---
_id: '10602'
abstract:
- lang: eng
  text: Transforming ω-automata into parity automata is traditionally done using appearance
    records. We present an efficient variant of this idea, tailored to Rabin automata,
    and several optimizations applicable to all appearance records. We compare the
    methods experimentally and show that our method produces significantly smaller
    automata than previous approaches.
acknowledgement: This work is partially funded by the German Research Foundation (DFG)
  projects Verified Model Checkers (No. 317422601) and Statistical Unbounded Verification
  (No. 383882557), and the Alexander von Humboldt Foundation with funds from the German
  Federal Ministry of Education and Research. It is an extended version of [21], including
  all proofs together with further explanations and examples. Moreover, we provide
  a new, more efficient construction based on (total) preorders, unifying previous
  optimizations. Experiments are performed with a new, performant implementation,
  comparing our approach to the current state of the art.
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Jan
  full_name: Kretinsky, Jan
  id: 44CEF464-F248-11E8-B48F-1D18A9856A87
  last_name: Kretinsky
  orcid: 0000-0002-8122-2881
- first_name: Tobias
  full_name: Meggendorfer, Tobias
  id: b21b0c15-30a2-11eb-80dc-f13ca25802e1
  last_name: Meggendorfer
  orcid: 0000-0002-1712-2165
- first_name: Clara
  full_name: Waldmann, Clara
  last_name: Waldmann
- first_name: Maximilian
  full_name: Weininger, Maximilian
  last_name: Weininger
citation:
  ama: Kretinsky J, Meggendorfer T, Waldmann C, Weininger M. Index appearance record
    with preorders. <i>Acta Informatica</i>. 2022;59:585-618. doi:<a href="https://doi.org/10.1007/s00236-021-00412-y">10.1007/s00236-021-00412-y</a>
  apa: Kretinsky, J., Meggendorfer, T., Waldmann, C., &#38; Weininger, M. (2022).
    Index appearance record with preorders. <i>Acta Informatica</i>. Springer Nature.
    <a href="https://doi.org/10.1007/s00236-021-00412-y">https://doi.org/10.1007/s00236-021-00412-y</a>
  chicago: Kretinsky, Jan, Tobias Meggendorfer, Clara Waldmann, and Maximilian Weininger.
    “Index Appearance Record with Preorders.” <i>Acta Informatica</i>. Springer Nature,
    2022. <a href="https://doi.org/10.1007/s00236-021-00412-y">https://doi.org/10.1007/s00236-021-00412-y</a>.
  ieee: J. Kretinsky, T. Meggendorfer, C. Waldmann, and M. Weininger, “Index appearance
    record with preorders,” <i>Acta Informatica</i>, vol. 59. Springer Nature, pp.
    585–618, 2022.
  ista: Kretinsky J, Meggendorfer T, Waldmann C, Weininger M. 2022. Index appearance
    record with preorders. Acta Informatica. 59, 585–618.
  mla: Kretinsky, Jan, et al. “Index Appearance Record with Preorders.” <i>Acta Informatica</i>,
    vol. 59, Springer Nature, 2022, pp. 585–618, doi:<a href="https://doi.org/10.1007/s00236-021-00412-y">10.1007/s00236-021-00412-y</a>.
  short: J. Kretinsky, T. Meggendorfer, C. Waldmann, M. Weininger, Acta Informatica
    59 (2022) 585–618.
date_created: 2022-01-06T12:37:27Z
date_published: 2022-10-01T00:00:00Z
date_updated: 2023-08-02T13:49:28Z
day: '01'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.1007/s00236-021-00412-y
external_id:
  isi:
  - '000735765500001'
file:
- access_level: open_access
  checksum: bf1c195b6aaf59e8530cf9e3a9d731f7
  content_type: application/pdf
  creator: cchlebak
  date_created: 2022-01-07T07:50:31Z
  date_updated: 2022-01-07T07:50:31Z
  file_id: '10603'
  file_name: 2021_ActaInfor_Křetínský.pdf
  file_size: 1066082
  relation: main_file
  success: 1
file_date_updated: 2022-01-07T07:50:31Z
has_accepted_license: '1'
intvolume: '        59'
isi: 1
keyword:
- computer networks and communications
- information systems
- software
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: 585-618
project:
- _id: B67AFEDC-15C9-11EA-A837-991A96BB2854
  name: IST Austria Open Access Fund
publication: Acta Informatica
publication_identifier:
  eissn:
  - 1432-0525
  issn:
  - 0001-5903
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Index appearance record with preorders
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 59
year: '2022'
...
---
_id: '10731'
abstract:
- lang: eng
  text: Motivated by COVID-19, we develop and analyze a simple stochastic model for
    the spread of disease in human population. We track how the number of infected
    and critically ill people develops over time in order to estimate the demand that
    is imposed on the hospital system. To keep this demand under control, we consider
    a class of simple policies for slowing down and reopening society and we compare
    their efficiency in mitigating the spread of the virus from several different
    points of view. We find that in order to avoid overwhelming of the hospital system,
    a policy must impose a harsh lockdown or it must react swiftly (or both). While
    reacting swiftly is universally beneficial, being harsh pays off only when the
    country is patient about reopening and when the neighboring countries coordinate
    their mitigation efforts. Our work highlights the importance of acting decisively
    when closing down and the importance of patience and coordination between neighboring
    countries when reopening.
acknowledgement: 'K.C. acknowledges support from ERC Consolidator Grant No. (863818:
  ForM-SMart). A.P. acknowledges support from FWF Grant No. J-4220. M.A.N. acknowledges
  support from Office of Naval Research grant N00014-16-1-2914 and from the John Templeton
  Foundation.'
article_number: '1526'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jakub
  full_name: Svoboda, Jakub
  id: 130759D2-D7DD-11E9-87D2-DE0DE6697425
  last_name: Svoboda
  orcid: 0000-0002-1419-3267
- first_name: Josef
  full_name: Tkadlec, Josef
  last_name: Tkadlec
- first_name: Andreas
  full_name: Pavlogiannis, Andreas
  id: 49704004-F248-11E8-B48F-1D18A9856A87
  last_name: Pavlogiannis
  orcid: 0000-0002-8943-0722
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Martin A.
  full_name: Nowak, Martin A.
  last_name: Nowak
citation:
  ama: Svoboda J, Tkadlec J, Pavlogiannis A, Chatterjee K, Nowak MA. Infection dynamics
    of COVID-19 virus under lockdown and reopening. <i>Scientific Reports</i>. 2022;12(1).
    doi:<a href="https://doi.org/10.1038/s41598-022-05333-5">10.1038/s41598-022-05333-5</a>
  apa: Svoboda, J., Tkadlec, J., Pavlogiannis, A., Chatterjee, K., &#38; Nowak, M.
    A. (2022). Infection dynamics of COVID-19 virus under lockdown and reopening.
    <i>Scientific Reports</i>. Springer Nature. <a href="https://doi.org/10.1038/s41598-022-05333-5">https://doi.org/10.1038/s41598-022-05333-5</a>
  chicago: Svoboda, Jakub, Josef Tkadlec, Andreas Pavlogiannis, Krishnendu Chatterjee,
    and Martin A. Nowak. “Infection Dynamics of COVID-19 Virus under Lockdown and
    Reopening.” <i>Scientific Reports</i>. Springer Nature, 2022. <a href="https://doi.org/10.1038/s41598-022-05333-5">https://doi.org/10.1038/s41598-022-05333-5</a>.
  ieee: J. Svoboda, J. Tkadlec, A. Pavlogiannis, K. Chatterjee, and M. A. Nowak, “Infection
    dynamics of COVID-19 virus under lockdown and reopening,” <i>Scientific Reports</i>,
    vol. 12, no. 1. Springer Nature, 2022.
  ista: Svoboda J, Tkadlec J, Pavlogiannis A, Chatterjee K, Nowak MA. 2022. Infection
    dynamics of COVID-19 virus under lockdown and reopening. Scientific Reports. 12(1),
    1526.
  mla: Svoboda, Jakub, et al. “Infection Dynamics of COVID-19 Virus under Lockdown
    and Reopening.” <i>Scientific Reports</i>, vol. 12, no. 1, 1526, Springer Nature,
    2022, doi:<a href="https://doi.org/10.1038/s41598-022-05333-5">10.1038/s41598-022-05333-5</a>.
  short: J. Svoboda, J. Tkadlec, A. Pavlogiannis, K. Chatterjee, M.A. Nowak, Scientific
    Reports 12 (2022).
date_created: 2022-02-06T23:01:30Z
date_published: 2022-01-27T00:00:00Z
date_updated: 2025-07-14T09:10:12Z
day: '27'
ddc:
- '570'
department:
- _id: KrCh
doi: 10.1038/s41598-022-05333-5
ec_funded: 1
external_id:
  arxiv:
  - '2012.15155'
  isi:
  - '000749198000039'
file:
- access_level: open_access
  checksum: 247afd30c173390940f099ead35a28ed
  content_type: application/pdf
  creator: alisjak
  date_created: 2022-02-07T14:57:59Z
  date_updated: 2022-02-07T14:57:59Z
  file_id: '10744'
  file_name: 2022_ScientificReports_Svoboda.pdf
  file_size: 2971922
  relation: main_file
  success: 1
file_date_updated: 2022-02-07T14:57:59Z
has_accepted_license: '1'
intvolume: '        12'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: Scientific Reports
publication_identifier:
  eissn:
  - 2045-2322
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Infection dynamics of COVID-19 virus under lockdown and reopening
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 12
year: '2022'
...
---
_id: '11402'
abstract:
- lang: eng
  text: Fixed-horizon planning considers a weighted graph and asks to construct a
    path that maximizes the sum of weights for a given time horizon T. However, in
    many scenarios, the time horizon is not fixed, but the stopping time is chosen
    according to some distribution such that the expected stopping time is T. If the
    stopping-time distribution is not known, then to ensure robustness, the distribution
    is chosen by an adversary as the worst-case scenario. A stationary plan for every
    vertex always chooses the same outgoing edge. For fixed horizon or fixed stopping-time
    distribution, stationary plans are not sufficient for optimality. Quite surprisingly
    we show that when an adversary chooses the stopping-time distribution with expected
    stopping-time T, then stationary plans are sufficient. While computing optimal
    stationary plans for fixed horizon is NP-complete, we show that computing optimal
    stationary plans under adversarial stopping-time distribution can be achieved
    in polynomial time.
acknowledgement: This work was partially supported by Austrian Science Fund (FWF)
  NFN Grant No RiSE/SHiNE S11407 and by the grant ERC CoG 863818 (ForM-SMArt).
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Laurent
  full_name: Doyen, Laurent
  last_name: Doyen
citation:
  ama: Chatterjee K, Doyen L. Graph planning with expected finite horizon. <i>Journal
    of Computer and System Sciences</i>. 2022;129:1-21. doi:<a href="https://doi.org/10.1016/j.jcss.2022.04.003">10.1016/j.jcss.2022.04.003</a>
  apa: Chatterjee, K., &#38; Doyen, L. (2022). Graph planning with expected finite
    horizon. <i>Journal of Computer and System Sciences</i>. Elsevier. <a href="https://doi.org/10.1016/j.jcss.2022.04.003">https://doi.org/10.1016/j.jcss.2022.04.003</a>
  chicago: Chatterjee, Krishnendu, and Laurent Doyen. “Graph Planning with Expected
    Finite Horizon.” <i>Journal of Computer and System Sciences</i>. Elsevier, 2022.
    <a href="https://doi.org/10.1016/j.jcss.2022.04.003">https://doi.org/10.1016/j.jcss.2022.04.003</a>.
  ieee: K. Chatterjee and L. Doyen, “Graph planning with expected finite horizon,”
    <i>Journal of Computer and System Sciences</i>, vol. 129. Elsevier, pp. 1–21,
    2022.
  ista: Chatterjee K, Doyen L. 2022. Graph planning with expected finite horizon.
    Journal of Computer and System Sciences. 129, 1–21.
  mla: Chatterjee, Krishnendu, and Laurent Doyen. “Graph Planning with Expected Finite
    Horizon.” <i>Journal of Computer and System Sciences</i>, vol. 129, Elsevier,
    2022, pp. 1–21, doi:<a href="https://doi.org/10.1016/j.jcss.2022.04.003">10.1016/j.jcss.2022.04.003</a>.
  short: K. Chatterjee, L. Doyen, Journal of Computer and System Sciences 129 (2022)
    1–21.
date_created: 2022-05-22T22:01:40Z
date_published: 2022-11-01T00:00:00Z
date_updated: 2025-07-14T09:09:54Z
day: '01'
department:
- _id: KrCh
doi: 10.1016/j.jcss.2022.04.003
ec_funded: 1
external_id:
  arxiv:
  - '1802.03642'
  isi:
  - '000805002800001'
intvolume: '       129'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: ' https://doi.org/10.48550/arXiv.1802.03642'
month: '11'
oa: 1
oa_version: Preprint
page: 1-21
project:
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11407
  name: Game Theory
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: Journal of Computer and System Sciences
publication_identifier:
  eissn:
  - 1090-2724
  issn:
  - 0022-0000
publication_status: published
publisher: Elsevier
quality_controlled: '1'
related_material:
  record:
  - id: '7402'
    relation: earlier_version
    status: public
scopus_import: '1'
status: public
title: Graph planning with expected finite horizon
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 129
year: '2022'
...
---
_id: '11459'
abstract:
- lang: eng
  text: 'We present a novel approach to differential cost analysis that, given a program
    revision, attempts to statically bound the difference in resource usage, or cost,
    between the two program versions. Differential cost analysis is particularly interesting
    because of the many compelling applications for it, such as detecting resource-use
    regressions at code-review time or proving the absence of certain side-channel
    vulnerabilities. One prior approach to differential cost analysis is to apply
    relational reasoning that conceptually constructs a product program on which one
    can over-approximate the difference in costs between the two program versions.
    However, a significant challenge in any relational approach is effectively aligning
    the program versions to get precise results. In this paper, our key insight is
    that we can avoid the need for and the limitations of program alignment if, instead,
    we bound the difference of two cost-bound summaries rather than directly bounding
    the concrete cost difference. In particular, our method computes a threshold value
    for the maximal difference in cost between two program versions simultaneously
    using two kinds of cost-bound summaries---a potential function that evaluates
    to an upper bound for the cost incurred in the first program and an anti-potential
    function that evaluates to a lower bound for the cost incurred in the second.
    Our method has a number of desirable properties: it can be fully automated, it
    allows optimizing the threshold value on relative cost, it is suitable for programs
    that are not syntactically similar, and it supports non-determinism. We have evaluated
    an implementation of our approach on a number of program pairs collected from
    the literature, and we find that our method computes tight threshold values on
    relative cost in most examples.'
acknowledgement: "We thank Shaun Willows, Thomas Lugnet, and the Living Room Application
  Vending team for suggesting threshold\r\nbounds as a developer-friendly way to interact
  with a differential cost analyzer, and we thank Jim Christy, Daniel\r\nSchoepe,
  and the Prime Video Automated Reasoning team for their support and helpful suggestions
  throughout the\r\nproject. We also thank Michael Emmi for feedback on an earlier
  version of this paper. And finally, we thank the anonymous reviewers for their useful
  feedback and Aws Albarghouthi for shepherding the final version of the paper. Ðorđe
  Žikelić was also partially supported by ERC CoG 863818 (FoRM-SMArt)."
article_processing_charge: No
arxiv: 1
author:
- first_name: Dorde
  full_name: Zikelic, Dorde
  id: 294AA7A6-F248-11E8-B48F-1D18A9856A87
  last_name: Zikelic
  orcid: 0000-0002-4681-1699
- first_name: Bor-Yuh Evan
  full_name: Chang, Bor-Yuh Evan
  last_name: Chang
- first_name: Pauline
  full_name: Bolignano, Pauline
  last_name: Bolignano
- first_name: Franco
  full_name: Raimondi, Franco
  last_name: Raimondi
citation:
  ama: 'Zikelic D, Chang B-YE, Bolignano P, Raimondi F. Differential cost analysis
    with simultaneous potentials and anti-potentials. In: <i>Proceedings of the 43rd
    ACM SIGPLAN International Conference on Programming Language Design and Implementation</i>.
    Association for Computing Machinery; 2022:442-457. doi:<a href="https://doi.org/10.1145/3519939.3523435">10.1145/3519939.3523435</a>'
  apa: 'Zikelic, D., Chang, B.-Y. E., Bolignano, P., &#38; Raimondi, F. (2022). Differential
    cost analysis with simultaneous potentials and anti-potentials. In <i>Proceedings
    of the 43rd ACM SIGPLAN International Conference on Programming Language Design
    and Implementation</i> (pp. 442–457). San Diego, CA, United States: Association
    for Computing Machinery. <a href="https://doi.org/10.1145/3519939.3523435">https://doi.org/10.1145/3519939.3523435</a>'
  chicago: Zikelic, Dorde, Bor-Yuh Evan Chang, Pauline Bolignano, and Franco Raimondi.
    “Differential Cost Analysis with Simultaneous Potentials and Anti-Potentials.”
    In <i>Proceedings of the 43rd ACM SIGPLAN International Conference on Programming
    Language Design and Implementation</i>, 442–57. Association for Computing Machinery,
    2022. <a href="https://doi.org/10.1145/3519939.3523435">https://doi.org/10.1145/3519939.3523435</a>.
  ieee: D. Zikelic, B.-Y. E. Chang, P. Bolignano, and F. Raimondi, “Differential cost
    analysis with simultaneous potentials and anti-potentials,” in <i>Proceedings
    of the 43rd ACM SIGPLAN International Conference on Programming Language Design
    and Implementation</i>, San Diego, CA, United States, 2022, pp. 442–457.
  ista: 'Zikelic D, Chang B-YE, Bolignano P, Raimondi F. 2022. Differential cost analysis
    with simultaneous potentials and anti-potentials. Proceedings of the 43rd ACM
    SIGPLAN International Conference on Programming Language Design and Implementation.
    PLDI: Programming Language Design and Implementation, 442–457.'
  mla: Zikelic, Dorde, et al. “Differential Cost Analysis with Simultaneous Potentials
    and Anti-Potentials.” <i>Proceedings of the 43rd ACM SIGPLAN International Conference
    on Programming Language Design and Implementation</i>, Association for Computing
    Machinery, 2022, pp. 442–57, doi:<a href="https://doi.org/10.1145/3519939.3523435">10.1145/3519939.3523435</a>.
  short: D. Zikelic, B.-Y.E. Chang, P. Bolignano, F. Raimondi, in:, Proceedings of
    the 43rd ACM SIGPLAN International Conference on Programming Language Design and
    Implementation, Association for Computing Machinery, 2022, pp. 442–457.
conference:
  end_date: 2022-06-17
  location: San Diego, CA, United States
  name: 'PLDI: Programming Language Design and Implementation'
  start_date: 2022-06-13
date_created: 2022-06-21T09:26:15Z
date_published: 2022-06-09T00:00:00Z
date_updated: 2025-07-14T09:09:54Z
day: '09'
ddc:
- '000'
department:
- _id: GradSch
- _id: KrCh
doi: 10.1145/3519939.3523435
ec_funded: 1
external_id:
  arxiv:
  - '2204.00870'
  isi:
  - '000850435600030'
file:
- access_level: open_access
  checksum: 7eb915a2ca5b5ce4729321f33b2e16e1
  content_type: application/pdf
  creator: dernst
  date_created: 2022-06-27T07:38:21Z
  date_updated: 2022-06-27T07:38:21Z
  file_id: '11466'
  file_name: 2022_PLDI_Zikelic.pdf
  file_size: 318697
  relation: main_file
  success: 1
file_date_updated: 2022-06-27T07:38:21Z
has_accepted_license: '1'
isi: 1
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 442-457
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: Proceedings of the 43rd ACM SIGPLAN International Conference on Programming
  Language Design and Implementation
publication_identifier:
  isbn:
  - '9781450392655'
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: Differential cost analysis with simultaneous potentials and anti-potentials
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: conference
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
year: '2022'
...
---
_id: '11938'
abstract:
- lang: eng
  text: A matching is compatible to two or more labeled point sets of size n with
    labels {1, . . . , n} if its straight-line drawing on each of these point sets
    is crossing-free. We study the maximum number of edges in a matching compatible
    to two or more labeled point sets in general position in the plane. We show that
    for any two labeled sets of n points in convex position there exists a compatible
    matching with ⌊√2n + 1 − 1⌋ edges. More generally, for any ℓ labeled point sets
    we construct compatible matchings of size Ω(n1/ℓ). As a corresponding upper bound,
    we use probabilistic arguments to show that for any ℓ given sets of n points there
    exists a labeling of each set such that the largest compatible matching has O(n2/(ℓ+1))
    edges. Finally, we show that Θ(log n) copies of any set of n points are necessary
    and sufficient for the existence of labelings of these point sets such that any
    compatible matching consists only of a single edge.
acknowledgement: 'A.A. funded by the Marie Sklodowska-Curie grant agreement No 754411.
  Z.M. partially funded by Wittgenstein Prize, Austrian Science Fund (FWF), grant
  no. Z 342-N31. I.P., D.P., and B.V. partially supported by FWF within the collaborative
  DACH project Arrangements and Drawings as FWF project I 3340-N35. A.P. supported
  by a Schrödinger fellowship of the FWF: J-3847-N35. J.T. partially supported by
  ERC Start grant no. (279307: Graph Games), FWF grant no. P23499-N23 and S11407-N23
  (RiSE).'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Oswin
  full_name: Aichholzer, Oswin
  last_name: Aichholzer
- first_name: Alan M
  full_name: Arroyo Guevara, Alan M
  id: 3207FDC6-F248-11E8-B48F-1D18A9856A87
  last_name: Arroyo Guevara
  orcid: 0000-0003-2401-8670
- first_name: Zuzana
  full_name: Masárová, Zuzana
  id: 45CFE238-F248-11E8-B48F-1D18A9856A87
  last_name: Masárová
  orcid: 0000-0002-6660-1322
- first_name: Irene
  full_name: Parada, Irene
  last_name: Parada
- first_name: Daniel
  full_name: Perz, Daniel
  last_name: Perz
- first_name: Alexander
  full_name: Pilz, Alexander
  last_name: Pilz
- first_name: Josef
  full_name: Tkadlec, Josef
  id: 3F24CCC8-F248-11E8-B48F-1D18A9856A87
  last_name: Tkadlec
  orcid: 0000-0002-1097-9684
- first_name: Birgit
  full_name: Vogtenhuber, Birgit
  last_name: Vogtenhuber
citation:
  ama: Aichholzer O, Arroyo Guevara AM, Masárová Z, et al. On compatible matchings.
    <i>Journal of Graph Algorithms and Applications</i>. 2022;26(2):225-240. doi:<a
    href="https://doi.org/10.7155/jgaa.00591">10.7155/jgaa.00591</a>
  apa: Aichholzer, O., Arroyo Guevara, A. M., Masárová, Z., Parada, I., Perz, D.,
    Pilz, A., … Vogtenhuber, B. (2022). On compatible matchings. <i>Journal of Graph
    Algorithms and Applications</i>. Brown University. <a href="https://doi.org/10.7155/jgaa.00591">https://doi.org/10.7155/jgaa.00591</a>
  chicago: Aichholzer, Oswin, Alan M Arroyo Guevara, Zuzana Masárová, Irene Parada,
    Daniel Perz, Alexander Pilz, Josef Tkadlec, and Birgit Vogtenhuber. “On Compatible
    Matchings.” <i>Journal of Graph Algorithms and Applications</i>. Brown University,
    2022. <a href="https://doi.org/10.7155/jgaa.00591">https://doi.org/10.7155/jgaa.00591</a>.
  ieee: O. Aichholzer <i>et al.</i>, “On compatible matchings,” <i>Journal of Graph
    Algorithms and Applications</i>, vol. 26, no. 2. Brown University, pp. 225–240,
    2022.
  ista: Aichholzer O, Arroyo Guevara AM, Masárová Z, Parada I, Perz D, Pilz A, Tkadlec
    J, Vogtenhuber B. 2022. On compatible matchings. Journal of Graph Algorithms and
    Applications. 26(2), 225–240.
  mla: Aichholzer, Oswin, et al. “On Compatible Matchings.” <i>Journal of Graph Algorithms
    and Applications</i>, vol. 26, no. 2, Brown University, 2022, pp. 225–40, doi:<a
    href="https://doi.org/10.7155/jgaa.00591">10.7155/jgaa.00591</a>.
  short: O. Aichholzer, A.M. Arroyo Guevara, Z. Masárová, I. Parada, D. Perz, A. Pilz,
    J. Tkadlec, B. Vogtenhuber, Journal of Graph Algorithms and Applications 26 (2022)
    225–240.
date_created: 2022-08-21T22:01:56Z
date_published: 2022-06-01T00:00:00Z
date_updated: 2023-02-23T13:54:21Z
day: '01'
ddc:
- '000'
department:
- _id: UlWa
- _id: HeEd
- _id: KrCh
doi: 10.7155/jgaa.00591
ec_funded: 1
external_id:
  arxiv:
  - '2101.03928'
file:
- access_level: open_access
  checksum: dc6e255e3558faff924fd9e370886c11
  content_type: application/pdf
  creator: dernst
  date_created: 2022-08-22T06:42:42Z
  date_updated: 2022-08-22T06:42:42Z
  file_id: '11940'
  file_name: 2022_JourGraphAlgorithmsApplic_Aichholzer.pdf
  file_size: 694538
  relation: main_file
  success: 1
file_date_updated: 2022-08-22T06:42:42Z
has_accepted_license: '1'
intvolume: '        26'
issue: '2'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 225-240
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
- _id: 268116B8-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: Z00342
  name: The Wittgenstein Prize
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '279307'
  name: 'Quantitative Graph Games: Theory and Applications'
- _id: 2584A770-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: P 23499-N23
  name: Modern Graph Algorithmic Techniques in Formal Verification
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11407
  name: Game Theory
publication: Journal of Graph Algorithms and Applications
publication_identifier:
  issn:
  - 1526-1719
publication_status: published
publisher: Brown University
quality_controlled: '1'
related_material:
  record:
  - id: '9296'
    relation: earlier_version
    status: public
scopus_import: '1'
status: public
title: On compatible matchings
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 26
year: '2022'
...
---
_id: '12000'
abstract:
- lang: eng
  text: "We consider the quantitative problem of obtaining lower-bounds on the probability
    of termination of a given non-deterministic probabilistic program. Specifically,
    given a non-termination threshold p∈[0,1], we aim for certificates proving that
    the program terminates with probability at least 1−p. The basic idea of our approach
    is to find a terminating stochastic invariant, i.e. a subset SI of program states
    such that (i) the probability of the program ever leaving SI is no more than p,
    and (ii) almost-surely, the program either leaves SI or terminates.\r\n\r\nWhile
    stochastic invariants are already well-known, we provide the first proof that
    the idea above is not only sound, but also complete for quantitative termination
    analysis. We then introduce a novel sound and complete characterization of stochastic
    invariants that enables template-based approaches for easy synthesis of quantitative
    termination certificates, especially in affine or polynomial forms. Finally, by
    combining this idea with the existing martingale-based methods that are relatively
    complete for qualitative termination analysis, we obtain the first automated,
    sound, and relatively complete algorithm for quantitative termination analysis.
    Notably, our completeness guarantees for quantitative termination analysis are
    as strong as the best-known methods for the qualitative variant.\r\n\r\nOur prototype
    implementation demonstrates the effectiveness of our approach on various probabilistic
    programs. We also demonstrate that our algorithm certifies lower bounds on termination
    probability for probabilistic programs that are beyond the reach of previous methods."
acknowledgement: This research was partially supported by the ERC CoG 863818 (ForM-SMArt),
  the HKUST-Kaisa Joint Research Institute Project Grant HKJRI3A-055, the HKUST Startup
  Grant R9272 and the European Union’s Horizon 2020 research and innovation programme
  under the Marie Skłodowska-Curie Grant Agreement No. 665385.
alternative_title:
- LNCS
article_processing_charge: Yes (in subscription journal)
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Amir Kafshdar
  full_name: Goharshady, Amir Kafshdar
  id: 391365CE-F248-11E8-B48F-1D18A9856A87
  last_name: Goharshady
  orcid: 0000-0003-1702-6584
- first_name: Tobias
  full_name: Meggendorfer, Tobias
  id: b21b0c15-30a2-11eb-80dc-f13ca25802e1
  last_name: Meggendorfer
  orcid: 0000-0002-1712-2165
- first_name: Dorde
  full_name: Zikelic, Dorde
  id: 294AA7A6-F248-11E8-B48F-1D18A9856A87
  last_name: Zikelic
  orcid: 0000-0002-4681-1699
citation:
  ama: 'Chatterjee K, Goharshady AK, Meggendorfer T, Zikelic D. Sound and complete
    certificates for auantitative termination analysis of probabilistic programs.
    In: <i>Proceedings of the 34th International Conference on Computer Aided Verification</i>.
    Vol 13371. Springer; 2022:55-78. doi:<a href="https://doi.org/10.1007/978-3-031-13185-1_4">10.1007/978-3-031-13185-1_4</a>'
  apa: 'Chatterjee, K., Goharshady, A. K., Meggendorfer, T., &#38; Zikelic, D. (2022).
    Sound and complete certificates for auantitative termination analysis of probabilistic
    programs. In <i>Proceedings of the 34th International Conference on Computer Aided
    Verification</i> (Vol. 13371, pp. 55–78). Haifa, Israel: Springer. <a href="https://doi.org/10.1007/978-3-031-13185-1_4">https://doi.org/10.1007/978-3-031-13185-1_4</a>'
  chicago: Chatterjee, Krishnendu, Amir Kafshdar Goharshady, Tobias Meggendorfer,
    and Dorde Zikelic. “Sound and Complete Certificates for Auantitative Termination
    Analysis of Probabilistic Programs.” In <i>Proceedings of the 34th International
    Conference on Computer Aided Verification</i>, 13371:55–78. Springer, 2022. <a
    href="https://doi.org/10.1007/978-3-031-13185-1_4">https://doi.org/10.1007/978-3-031-13185-1_4</a>.
  ieee: K. Chatterjee, A. K. Goharshady, T. Meggendorfer, and D. Zikelic, “Sound and complete
    certificates for auantitative termination analysis of probabilistic programs,”
    in <i>Proceedings of the 34th International Conference on Computer Aided Verification</i>,
    Haifa, Israel, 2022, vol. 13371, pp. 55–78.
  ista: 'Chatterjee K, Goharshady AK, Meggendorfer T, Zikelic D. 2022. Sound and complete
    certificates for auantitative termination analysis of probabilistic programs.
    Proceedings of the 34th International Conference on Computer Aided Verification.
    CAV: Computer Aided Verification, LNCS, vol. 13371, 55–78.'
  mla: Chatterjee, Krishnendu, et al. “Sound and Complete Certificates for Auantitative
    Termination Analysis of Probabilistic Programs.” <i>Proceedings of the 34th International
    Conference on Computer Aided Verification</i>, vol. 13371, Springer, 2022, pp.
    55–78, doi:<a href="https://doi.org/10.1007/978-3-031-13185-1_4">10.1007/978-3-031-13185-1_4</a>.
  short: K. Chatterjee, A.K. Goharshady, T. Meggendorfer, D. Zikelic, in:, Proceedings
    of the 34th International Conference on Computer Aided Verification, Springer,
    2022, pp. 55–78.
conference:
  end_date: 2022-08-10
  location: Haifa, Israel
  name: 'CAV: Computer Aided Verification'
  start_date: 2022-08-07
date_created: 2022-08-28T22:02:02Z
date_published: 2022-08-07T00:00:00Z
date_updated: 2025-07-14T09:09:58Z
day: '07'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.1007/978-3-031-13185-1_4
ec_funded: 1
external_id:
  isi:
  - '000870304500004'
file:
- access_level: open_access
  checksum: 24e0f810ec52735a90ade95198bc641d
  content_type: application/pdf
  creator: alisjak
  date_created: 2022-08-29T09:17:01Z
  date_updated: 2022-08-29T09:17:01Z
  file_id: '12003'
  file_name: 2022_LNCS_Chatterjee.pdf
  file_size: 505094
  relation: main_file
  success: 1
file_date_updated: 2022-08-29T09:17:01Z
has_accepted_license: '1'
intvolume: '     13371'
isi: 1
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
page: 55-78
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
publication: Proceedings of the 34th International Conference on Computer Aided Verification
publication_identifier:
  eissn:
  - 1611-3349
  isbn:
  - '9783031131844'
  issn:
  - 0302-9743
publication_status: published
publisher: Springer
quality_controlled: '1'
related_material:
  record:
  - id: '14539'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: Sound and complete certificates for auantitative termination analysis of probabilistic
  programs
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: conference
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 13371
year: '2022'
...
---
_id: '12101'
abstract:
- lang: eng
  text: 'Spatial games form a widely-studied class of games from biology and physics
    modeling the evolution of social behavior. Formally, such a game is defined by
    a square (d by d) payoff matrix M and an undirected graph G. Each vertex of G
    represents an individual, that initially follows some strategy i ∈ {1,2,…,d}.
    In each round of the game, every individual plays the matrix game with each of
    its neighbors: An individual following strategy i meeting a neighbor following
    strategy j receives a payoff equal to the entry (i,j) of M. Then, each individual
    updates its strategy to its neighbors'' strategy with the highest sum of payoffs,
    and the next round starts. The basic computational problems consist of reachability
    between configurations and the average frequency of a strategy. For general spatial
    games and graphs, these problems are in PSPACE. In this paper, we examine restricted
    setting: the game is a prisoner’s dilemma; and G is a subgraph of grid. We prove
    that basic computational problems for spatial games with prisoner’s dilemma on
    a subgraph of a grid are PSPACE-hard.'
acknowledgement: "Krishnendu Chatterjee: The research was partially supported by the
  ERC CoG 863818\r\n(ForM-SMArt).\r\nIsmaël Jecker: The research was partially supported
  by the ERC grant 950398 (INFSYS).\r\nJakub Svoboda: The research was partially supported
  by the ERC CoG 863818 (ForM-SMArt)"
article_number: 11:1-11:14
article_processing_charge: No
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Rasmus
  full_name: Ibsen-Jensen, Rasmus
  id: 3B699956-F248-11E8-B48F-1D18A9856A87
  last_name: Ibsen-Jensen
  orcid: 0000-0003-4783-0389
- first_name: Ismael R
  full_name: Jecker, Ismael R
  id: 85D7C63E-7D5D-11E9-9C0F-98C4E5697425
  last_name: Jecker
- first_name: Jakub
  full_name: Svoboda, Jakub
  id: 130759D2-D7DD-11E9-87D2-DE0DE6697425
  last_name: Svoboda
  orcid: 0000-0002-1419-3267
citation:
  ama: 'Chatterjee K, Ibsen-Jensen R, Jecker IR, Svoboda J. Complexity of spatial
    games. In: <i>42nd IARCS Annual Conference on Foundations of Software Technology
    and Theoretical Computer Science</i>. Vol 250. Schloss Dagstuhl - Leibniz-Zentrum
    für Informatik; 2022. doi:<a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.11">10.4230/LIPIcs.FSTTCS.2022.11</a>'
  apa: 'Chatterjee, K., Ibsen-Jensen, R., Jecker, I. R., &#38; Svoboda, J. (2022).
    Complexity of spatial games. In <i>42nd IARCS Annual Conference on Foundations
    of Software Technology and Theoretical Computer Science</i> (Vol. 250). Madras,
    India: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. <a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.11">https://doi.org/10.4230/LIPIcs.FSTTCS.2022.11</a>'
  chicago: Chatterjee, Krishnendu, Rasmus Ibsen-Jensen, Ismael R Jecker, and Jakub
    Svoboda. “Complexity of Spatial Games.” In <i>42nd IARCS Annual Conference on
    Foundations of Software Technology and Theoretical Computer Science</i>, Vol.
    250. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2022. <a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.11">https://doi.org/10.4230/LIPIcs.FSTTCS.2022.11</a>.
  ieee: K. Chatterjee, R. Ibsen-Jensen, I. R. Jecker, and J. Svoboda, “Complexity
    of spatial games,” in <i>42nd IARCS Annual Conference on Foundations of Software
    Technology and Theoretical Computer Science</i>, Madras, India, 2022, vol. 250.
  ista: 'Chatterjee K, Ibsen-Jensen R, Jecker IR, Svoboda J. 2022. Complexity of spatial
    games. 42nd IARCS Annual Conference on Foundations of Software Technology and
    Theoretical Computer Science. FSTTC: Foundations of Software Technology and Theoretical
    Computer Science vol. 250, 11:1-11:14.'
  mla: Chatterjee, Krishnendu, et al. “Complexity of Spatial Games.” <i>42nd IARCS
    Annual Conference on Foundations of Software Technology and Theoretical Computer
    Science</i>, vol. 250, 11:1-11:14, Schloss Dagstuhl - Leibniz-Zentrum für Informatik,
    2022, doi:<a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.11">10.4230/LIPIcs.FSTTCS.2022.11</a>.
  short: K. Chatterjee, R. Ibsen-Jensen, I.R. Jecker, J. Svoboda, in:, 42nd IARCS
    Annual Conference on Foundations of Software Technology and Theoretical Computer
    Science, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2022.
conference:
  end_date: 2022-12-20
  location: Madras, India
  name: 'FSTTC: Foundations of Software Technology and Theoretical Computer Science'
  start_date: 2022-12-18
date_created: 2023-01-01T23:00:50Z
date_published: 2022-12-14T00:00:00Z
date_updated: 2025-07-14T09:09:55Z
day: '14'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.4230/LIPIcs.FSTTCS.2022.11
ec_funded: 1
file:
- access_level: open_access
  checksum: a21e3ba2421e2c4a06aa2cb6d530ede1
  content_type: application/pdf
  creator: dernst
  date_created: 2023-01-20T10:19:19Z
  date_updated: 2023-01-20T10:19:19Z
  file_id: '12323'
  file_name: 2022_LIPICs_Chatterjee.pdf
  file_size: 657396
  relation: main_file
  success: 1
file_date_updated: 2023-01-20T10:19:19Z
has_accepted_license: '1'
intvolume: '       250'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: 42nd IARCS Annual Conference on Foundations of Software Technology and
  Theoretical Computer Science
publication_identifier:
  isbn:
  - '9783959772617'
  issn:
  - 1868-8969
publication_status: published
publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
quality_controlled: '1'
scopus_import: '1'
status: public
title: Complexity of spatial games
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 250
year: '2022'
...
---
_id: '12102'
abstract:
- lang: eng
  text: 'Given a Markov chain M = (V, v_0, δ), with state space V and a starting state
    v_0, and a probability threshold ε, an ε-core is a subset C of states that is
    left with probability at most ε. More formally, C ⊆ V is an ε-core, iff ℙ[reach
    (V\C)] ≤ ε. Cores have been applied in a wide variety of verification problems
    over Markov chains, Markov decision processes, and probabilistic programs, as
    a means of discarding uninteresting and low-probability parts of a probabilistic
    system and instead being able to focus on the states that are likely to be encountered
    in a real-world run. In this work, we focus on the problem of computing a minimal
    ε-core in a Markov chain. Our contributions include both negative and positive
    results: (i) We show that the decision problem on the existence of an ε-core of
    a given size is NP-complete. This solves an open problem posed in [Jan Kretínský
    and Tobias Meggendorfer, 2020]. We additionally show that the problem remains
    NP-complete even when limited to acyclic Markov chains with bounded maximal vertex
    degree; (ii) We provide a polynomial time algorithm for computing a minimal ε-core
    on Markov chains over control-flow graphs of structured programs. A straightforward
    combination of our algorithm with standard branch prediction techniques allows
    one to apply the idea of cores to find a subset of program lines that are left
    with low probability and then focus any desired static analysis on this core subset.'
acknowledgement: "The research was partially supported by the Hong Kong Research Grants
  Council ECS\r\nProject No. 26208122, ERC CoG 863818 (FoRM-SMArt), the European Union’s
  Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie
  Grant Agreement No. 665385, HKUST– Kaisa Joint Research Institute Project Grant
  HKJRI3A-055 and HKUST Startup Grant R9272. Ali Ahmadi and Roodabeh Safavi were interns
  at HKUST."
article_number: '29'
article_processing_charge: No
author:
- first_name: Ali
  full_name: Ahmadi, Ali
  last_name: Ahmadi
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Amir Kafshdar
  full_name: Goharshady, Amir Kafshdar
  id: 391365CE-F248-11E8-B48F-1D18A9856A87
  last_name: Goharshady
  orcid: 0000-0003-1702-6584
- first_name: Tobias
  full_name: Meggendorfer, Tobias
  id: b21b0c15-30a2-11eb-80dc-f13ca25802e1
  last_name: Meggendorfer
  orcid: 0000-0002-1712-2165
- first_name: Roodabeh
  full_name: Safavi Hemami, Roodabeh
  id: 72ed2640-8972-11ed-ae7b-f9c81ec75154
  last_name: Safavi Hemami
- first_name: Dorde
  full_name: Zikelic, Dorde
  id: 294AA7A6-F248-11E8-B48F-1D18A9856A87
  last_name: Zikelic
  orcid: 0000-0002-4681-1699
citation:
  ama: 'Ahmadi A, Chatterjee K, Goharshady AK, Meggendorfer T, Safavi Hemami R, Zikelic
    D. Algorithms and hardness results for computing cores of Markov chains. In: <i>42nd
    IARCS Annual Conference on Foundations of Software Technology and Theoretical
    Computer Science</i>. Vol 250. Schloss Dagstuhl - Leibniz-Zentrum für Informatik;
    2022. doi:<a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.29">10.4230/LIPIcs.FSTTCS.2022.29</a>'
  apa: 'Ahmadi, A., Chatterjee, K., Goharshady, A. K., Meggendorfer, T., Safavi Hemami,
    R., &#38; Zikelic, D. (2022). Algorithms and hardness results for computing cores
    of Markov chains. In <i>42nd IARCS Annual Conference on Foundations of Software
    Technology and Theoretical Computer Science</i> (Vol. 250). Madras, India: Schloss
    Dagstuhl - Leibniz-Zentrum für Informatik. <a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.29">https://doi.org/10.4230/LIPIcs.FSTTCS.2022.29</a>'
  chicago: Ahmadi, Ali, Krishnendu Chatterjee, Amir Kafshdar Goharshady, Tobias Meggendorfer,
    Roodabeh Safavi Hemami, and Dorde Zikelic. “Algorithms and Hardness Results for
    Computing Cores of Markov Chains.” In <i>42nd IARCS Annual Conference on Foundations
    of Software Technology and Theoretical Computer Science</i>, Vol. 250. Schloss
    Dagstuhl - Leibniz-Zentrum für Informatik, 2022. <a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.29">https://doi.org/10.4230/LIPIcs.FSTTCS.2022.29</a>.
  ieee: A. Ahmadi, K. Chatterjee, A. K. Goharshady, T. Meggendorfer, R. Safavi Hemami,
    and D. Zikelic, “Algorithms and hardness results for computing cores of Markov
    chains,” in <i>42nd IARCS Annual Conference on Foundations of Software Technology
    and Theoretical Computer Science</i>, Madras, India, 2022, vol. 250.
  ista: 'Ahmadi A, Chatterjee K, Goharshady AK, Meggendorfer T, Safavi Hemami R, Zikelic
    D. 2022. Algorithms and hardness results for computing cores of Markov chains.
    42nd IARCS Annual Conference on Foundations of Software Technology and Theoretical
    Computer Science. FSTTC: Foundations of Software Technology and Theoretical Computer
    Science vol. 250, 29.'
  mla: Ahmadi, Ali, et al. “Algorithms and Hardness Results for Computing Cores of
    Markov Chains.” <i>42nd IARCS Annual Conference on Foundations of Software Technology
    and Theoretical Computer Science</i>, vol. 250, 29, Schloss Dagstuhl - Leibniz-Zentrum
    für Informatik, 2022, doi:<a href="https://doi.org/10.4230/LIPIcs.FSTTCS.2022.29">10.4230/LIPIcs.FSTTCS.2022.29</a>.
  short: A. Ahmadi, K. Chatterjee, A.K. Goharshady, T. Meggendorfer, R. Safavi Hemami,
    D. Zikelic, in:, 42nd IARCS Annual Conference on Foundations of Software Technology
    and Theoretical Computer Science, Schloss Dagstuhl - Leibniz-Zentrum für Informatik,
    2022.
conference:
  end_date: 2022-12-20
  location: Madras, India
  name: 'FSTTC: Foundations of Software Technology and Theoretical Computer Science'
  start_date: 2022-12-18
date_created: 2023-01-01T23:00:50Z
date_published: 2022-12-14T00:00:00Z
date_updated: 2025-07-14T09:09:55Z
day: '14'
ddc:
- '000'
department:
- _id: KrCh
- _id: GradSch
doi: 10.4230/LIPIcs.FSTTCS.2022.29
ec_funded: 1
file:
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file_date_updated: 2023-01-20T10:39:44Z
has_accepted_license: '1'
intvolume: '       250'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
publication: 42nd IARCS Annual Conference on Foundations of Software Technology and
  Theoretical Computer Science
publication_identifier:
  isbn:
  - '9783959772617'
  issn:
  - 1868-8969
publication_status: published
publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik
quality_controlled: '1'
scopus_import: '1'
status: public
title: Algorithms and hardness results for computing cores of Markov chains
tmp:
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  short: CC BY (4.0)
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 250
year: '2022'
...
---
_id: '12767'
abstract:
- lang: eng
  text: "Several problems in planning and reactive synthesis can be reduced to the
    analysis of two-player quantitative graph games. Optimization is one form of analysis.
    We argue that in many cases it may be better to replace the optimization problem
    with the satisficing problem, where instead of searching for optimal solutions,
    the goal is to search for solutions that adhere to a given threshold bound.\r\nThis
    work defines and investigates the satisficing problem on a two-player graph game
    with the discounted-sum cost model. We show that while the satisficing problem
    can be solved using numerical methods just like the optimization problem, this
    approach does not render compelling benefits over optimization. When the discount
    factor is, however, an integer, we present another approach to satisficing, which
    is purely based on automata methods. We show that this approach is algorithmically
    more performant – both theoretically and empirically – and demonstrates the broader
    applicability of satisficing over optimization."
acknowledgement: We thank anonymous reviewers for valuable inputs. This work is supported
  in part by NSF grant 2030859 to the CRA for the CIFellows Project, NSF grants IIS-1527668,
  CCF-1704883, IIS-1830549, the ERC CoG 863818 (ForM-SMArt), and an award from the
  Maryland Procurement Office.
alternative_title:
- LNCS
article_processing_charge: No
arxiv: 1
author:
- first_name: Suguman
  full_name: Bansal, Suguman
  last_name: Bansal
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Moshe Y.
  full_name: Vardi, Moshe Y.
  last_name: Vardi
citation:
  ama: 'Bansal S, Chatterjee K, Vardi MY. On satisficing in quantitative games. In:
    <i>27th International Conference on Tools and Algorithms for the Construction
    and Analysis of Systems</i>. Vol 12651. Springer Nature; 2021:20-37. doi:<a href="https://doi.org/10.1007/978-3-030-72016-2">10.1007/978-3-030-72016-2</a>'
  apa: 'Bansal, S., Chatterjee, K., &#38; Vardi, M. Y. (2021). On satisficing in quantitative
    games. In <i>27th International Conference on Tools and Algorithms for the Construction
    and Analysis of Systems</i> (Vol. 12651, pp. 20–37). Luxembourg City, Luxembourg:
    Springer Nature. <a href="https://doi.org/10.1007/978-3-030-72016-2">https://doi.org/10.1007/978-3-030-72016-2</a>'
  chicago: Bansal, Suguman, Krishnendu Chatterjee, and Moshe Y. Vardi. “On Satisficing
    in Quantitative Games.” In <i>27th International Conference on Tools and Algorithms
    for the Construction and Analysis of Systems</i>, 12651:20–37. Springer Nature,
    2021. <a href="https://doi.org/10.1007/978-3-030-72016-2">https://doi.org/10.1007/978-3-030-72016-2</a>.
  ieee: S. Bansal, K. Chatterjee, and M. Y. Vardi, “On satisficing in quantitative
    games,” in <i>27th International Conference on Tools and Algorithms for the Construction
    and Analysis of Systems</i>, Luxembourg City, Luxembourg, 2021, vol. 12651, pp.
    20–37.
  ista: 'Bansal S, Chatterjee K, Vardi MY. 2021. On satisficing in quantitative games.
    27th International Conference on Tools and Algorithms for the Construction and
    Analysis of Systems. TACAS: Tools and Algorithms for the Construction and Analysis
    of Systems, LNCS, vol. 12651, 20–37.'
  mla: Bansal, Suguman, et al. “On Satisficing in Quantitative Games.” <i>27th International
    Conference on Tools and Algorithms for the Construction and Analysis of Systems</i>,
    vol. 12651, Springer Nature, 2021, pp. 20–37, doi:<a href="https://doi.org/10.1007/978-3-030-72016-2">10.1007/978-3-030-72016-2</a>.
  short: S. Bansal, K. Chatterjee, M.Y. Vardi, in:, 27th International Conference
    on Tools and Algorithms for the Construction and Analysis of Systems, Springer
    Nature, 2021, pp. 20–37.
conference:
  end_date: 2021-04-01
  location: Luxembourg City, Luxembourg
  name: 'TACAS: Tools and Algorithms for the Construction and Analysis of Systems'
  start_date: 2021-03-27
date_created: 2023-03-26T22:01:09Z
date_published: 2021-03-21T00:00:00Z
date_updated: 2025-07-14T09:09:51Z
day: '21'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.1007/978-3-030-72016-2
ec_funded: 1
external_id:
  arxiv:
  - '2101.02594'
file:
- access_level: open_access
  checksum: b020b78b23587ce7610b1aafb4e63438
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  creator: dernst
  date_created: 2023-03-28T11:00:33Z
  date_updated: 2023-03-28T11:00:33Z
  file_id: '12777'
  file_name: 2021_LNCS_Bansal.pdf
  file_size: 747418
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  success: 1
file_date_updated: 2023-03-28T11:00:33Z
has_accepted_license: '1'
intvolume: '     12651'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
page: 20-37
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: 27th International Conference on Tools and Algorithms for the Construction
  and Analysis of Systems
publication_identifier:
  eissn:
  - 1611-3349
  isbn:
  - '9783030720155'
  issn:
  - 0302-9743
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: On satisficing in quantitative games
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
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  short: CC BY (4.0)
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 12651
year: '2021'
...
---
_id: '8793'
abstract:
- lang: eng
  text: We study optimal election sequences for repeatedly selecting a (very) small
    group of leaders among a set of participants (players) with publicly known unique
    ids. In every time slot, every player has to select exactly one player that it
    considers to be the current leader, oblivious to the selection of the other players,
    but with the overarching goal of maximizing a given parameterized global (“social”)
    payoff function in the limit. We consider a quite generic model, where the local
    payoff achieved by a given player depends, weighted by some arbitrary but fixed
    real parameter, on the number of different leaders chosen in a round, the number
    of players that choose the given player as the leader, and whether the chosen
    leader has changed w.r.t. the previous round or not. The social payoff can be
    the maximum, average or minimum local payoff of the players. Possible applications
    include quite diverse examples such as rotating coordinator-based distributed
    algorithms and long-haul formation flying of social birds. Depending on the weights
    and the particular social payoff, optimal sequences can be very different, from
    simple round-robin where all players chose the same leader alternatingly every
    time slot to very exotic patterns, where a small group of leaders (at most 2)
    is elected in every time slot. Moreover, we study the question if and when a single
    player would not benefit w.r.t. its local payoff when deviating from the given
    optimal sequence, i.e., when our optimal sequences are Nash equilibria in the
    restricted strategy space of oblivious strategies. As this is the case for many
    parameterizations of our model, our results reveal that no punishment is needed
    to make it rational for the players to optimize the social payoff.
acknowledgement: "We are grateful to Matthias Függer and Thomas Nowak for having raised
  our interest in the problem studied in this paper.\r\nThis work has been supported
  the Austrian Science Fund (FWF) projects S11405, S11407 (RiSE), and P28182 (ADynNet)."
article_processing_charge: No
article_type: original
author:
- first_name: Martin
  full_name: Zeiner, Martin
  last_name: Zeiner
- first_name: Ulrich
  full_name: Schmid, Ulrich
  last_name: Schmid
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
citation:
  ama: Zeiner M, Schmid U, Chatterjee K. Optimal strategies for selecting coordinators.
    <i>Discrete Applied Mathematics</i>. 2021;289(1):392-415. doi:<a href="https://doi.org/10.1016/j.dam.2020.10.022">10.1016/j.dam.2020.10.022</a>
  apa: Zeiner, M., Schmid, U., &#38; Chatterjee, K. (2021). Optimal strategies for
    selecting coordinators. <i>Discrete Applied Mathematics</i>. Elsevier. <a href="https://doi.org/10.1016/j.dam.2020.10.022">https://doi.org/10.1016/j.dam.2020.10.022</a>
  chicago: Zeiner, Martin, Ulrich Schmid, and Krishnendu Chatterjee. “Optimal Strategies
    for Selecting Coordinators.” <i>Discrete Applied Mathematics</i>. Elsevier, 2021.
    <a href="https://doi.org/10.1016/j.dam.2020.10.022">https://doi.org/10.1016/j.dam.2020.10.022</a>.
  ieee: M. Zeiner, U. Schmid, and K. Chatterjee, “Optimal strategies for selecting
    coordinators,” <i>Discrete Applied Mathematics</i>, vol. 289, no. 1. Elsevier,
    pp. 392–415, 2021.
  ista: Zeiner M, Schmid U, Chatterjee K. 2021. Optimal strategies for selecting coordinators.
    Discrete Applied Mathematics. 289(1), 392–415.
  mla: Zeiner, Martin, et al. “Optimal Strategies for Selecting Coordinators.” <i>Discrete
    Applied Mathematics</i>, vol. 289, no. 1, Elsevier, 2021, pp. 392–415, doi:<a
    href="https://doi.org/10.1016/j.dam.2020.10.022">10.1016/j.dam.2020.10.022</a>.
  short: M. Zeiner, U. Schmid, K. Chatterjee, Discrete Applied Mathematics 289 (2021)
    392–415.
date_created: 2020-11-22T23:01:26Z
date_published: 2021-01-31T00:00:00Z
date_updated: 2023-08-04T11:12:41Z
day: '31'
ddc:
- '510'
department:
- _id: KrCh
doi: 10.1016/j.dam.2020.10.022
external_id:
  isi:
  - '000596823800035'
file:
- access_level: open_access
  checksum: f1039ff5a2d6ca116720efdb84ee9d5e
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  date_created: 2021-02-04T11:28:42Z
  date_updated: 2021-02-04T11:28:42Z
  file_id: '9089'
  file_name: 2021_DiscreteApplMath_Zeiner.pdf
  file_size: 652739
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  success: 1
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has_accepted_license: '1'
intvolume: '       289'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
page: 392-415
project:
- _id: 25F2ACDE-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11402-N23
  name: Rigorous Systems Engineering
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11407
  name: Game Theory
publication: Discrete Applied Mathematics
publication_identifier:
  issn:
  - 0166218X
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Optimal strategies for selecting coordinators
tmp:
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  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 289
year: '2021'
...
---
_id: '8934'
abstract:
- lang: eng
  text: "In this thesis, we consider several of the most classical and fundamental
    problems in static analysis and formal verification, including invariant generation,
    reachability analysis, termination analysis of probabilistic programs, data-flow
    analysis, quantitative analysis of Markov chains and Markov decision processes,
    and the problem of data packing in cache management.\r\nWe use techniques from
    parameterized complexity theory, polyhedral geometry, and real algebraic geometry
    to significantly improve the state-of-the-art, in terms of both scalability and
    completeness guarantees, for the mentioned problems. In some cases, our results
    are the first theoretical improvements for the respective problems in two or three
    decades."
acknowledgement: 'The research was partially supported by an IBM PhD fellowship, a
  Facebook PhD fellowship, and DOC fellowship #24956 of the Austrian Academy of Sciences
  (OeAW).'
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Amir Kafshdar
  full_name: Goharshady, Amir Kafshdar
  id: 391365CE-F248-11E8-B48F-1D18A9856A87
  last_name: Goharshady
  orcid: 0000-0003-1702-6584
citation:
  ama: Goharshady AK. Parameterized and algebro-geometric advances in static program
    analysis. 2021. doi:<a href="https://doi.org/10.15479/AT:ISTA:8934">10.15479/AT:ISTA:8934</a>
  apa: Goharshady, A. K. (2021). <i>Parameterized and algebro-geometric advances in
    static program analysis</i>. Institute of Science and Technology Austria. <a href="https://doi.org/10.15479/AT:ISTA:8934">https://doi.org/10.15479/AT:ISTA:8934</a>
  chicago: Goharshady, Amir Kafshdar. “Parameterized and Algebro-Geometric Advances
    in Static Program Analysis.” Institute of Science and Technology Austria, 2021.
    <a href="https://doi.org/10.15479/AT:ISTA:8934">https://doi.org/10.15479/AT:ISTA:8934</a>.
  ieee: A. K. Goharshady, “Parameterized and algebro-geometric advances in static
    program analysis,” Institute of Science and Technology Austria, 2021.
  ista: Goharshady AK. 2021. Parameterized and algebro-geometric advances in static
    program analysis. Institute of Science and Technology Austria.
  mla: Goharshady, Amir Kafshdar. <i>Parameterized and Algebro-Geometric Advances
    in Static Program Analysis</i>. Institute of Science and Technology Austria, 2021,
    doi:<a href="https://doi.org/10.15479/AT:ISTA:8934">10.15479/AT:ISTA:8934</a>.
  short: A.K. Goharshady, Parameterized and Algebro-Geometric Advances in Static Program
    Analysis, Institute of Science and Technology Austria, 2021.
date_created: 2020-12-10T12:17:07Z
date_published: 2021-01-01T00:00:00Z
date_updated: 2025-06-02T08:53:47Z
day: '01'
ddc:
- '005'
degree_awarded: PhD
department:
- _id: KrCh
- _id: GradSch
doi: 10.15479/AT:ISTA:8934
file:
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  date_updated: 2021-12-23T23:30:04Z
  embargo: 2021-12-22
  file_id: '8969'
  file_name: Thesis-pdfa.pdf
  file_size: 5251507
  relation: main_file
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  date_created: 2020-12-22T20:08:50Z
  date_updated: 2021-03-04T23:30:04Z
  embargo_to: open_access
  file_id: '8970'
  file_name: source.zip
  file_size: 10636756
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has_accepted_license: '1'
language:
- iso: eng
license: https://creativecommons.org/publicdomain/zero/1.0/
month: '01'
oa: 1
oa_version: Published Version
page: '278'
project:
- _id: 267066CE-B435-11E9-9278-68D0E5697425
  name: Quantitative Analysis of Probablistic Systems with a focus on Crypto-currencies
- _id: 266EEEC0-B435-11E9-9278-68D0E5697425
  name: Quantitative Game-theoretic Analysis of Blockchain Applications and Smart
    Contracts
publication_identifier:
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
  record:
  - id: '1386'
    relation: part_of_dissertation
    status: public
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    relation: part_of_dissertation
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    relation: part_of_dissertation
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  - id: '6918'
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  - id: '6490'
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  - id: '949'
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    relation: part_of_dissertation
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  - id: '7810'
    relation: part_of_dissertation
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  - id: '8089'
    relation: part_of_dissertation
    status: public
  - id: '8728'
    relation: part_of_dissertation
    status: public
  - id: '5977'
    relation: part_of_dissertation
    status: public
  - id: '6056'
    relation: part_of_dissertation
    status: public
  - id: '6175'
    relation: part_of_dissertation
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  - id: '6340'
    relation: part_of_dissertation
    status: public
  - id: '6378'
    relation: part_of_dissertation
    status: public
  - id: '6380'
    relation: part_of_dissertation
    status: public
  - id: '66'
    relation: part_of_dissertation
    status: public
  - id: '6780'
    relation: part_of_dissertation
    status: public
  - id: '7014'
    relation: part_of_dissertation
    status: public
status: public
supervisor:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
title: Parameterized and algebro-geometric advances in static program analysis
tmp:
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  legal_code_url: https://creativecommons.org/publicdomain/zero/1.0/legalcode
  name: Creative Commons Public Domain Dedication (CC0 1.0)
  short: CC0 (1.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2021'
...
---
_id: '9293'
abstract:
- lang: eng
  text: 'We consider planning problems for graphs, Markov Decision Processes (MDPs),
    and games on graphs in an explicit state space. While graphs represent the most
    basic planning model, MDPs represent interaction with nature and games on graphs
    represent interaction with an adversarial environment. We consider two planning
    problems with k different target sets: (a) the coverage problem asks whether there
    is a plan for each individual target set; and (b) the sequential target reachability
    problem asks whether the targets can be reached in a given sequence. For the coverage
    problem, we present a linear-time algorithm for graphs, and quadratic conditional
    lower bound for MDPs and games on graphs. For the sequential target problem, we
    present a linear-time algorithm for graphs, a sub-quadratic algorithm for MDPs,
    and a quadratic conditional lower bound for games on graphs. Our results with
    conditional lower bounds, based on the boolean matrix multiplication (BMM) conjecture
    and strong exponential time hypothesis (SETH), establish (i) model-separation
    results showing that for the coverage problem MDPs and games on graphs are harder
    than graphs, and for the sequential reachability problem games on graphs are harder
    than MDPs and graphs; and (ii) problem-separation results showing that for MDPs
    the coverage problem is harder than the sequential target problem.'
article_number: '103499'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Wolfgang
  full_name: Dvořák, Wolfgang
  last_name: Dvořák
- first_name: Monika H
  full_name: Henzinger, Monika H
  id: 540c9bbd-f2de-11ec-812d-d04a5be85630
  last_name: Henzinger
  orcid: 0000-0002-5008-6530
- first_name: Alexander
  full_name: Svozil, Alexander
  last_name: Svozil
citation:
  ama: Chatterjee K, Dvořák W, Henzinger MH, Svozil A. Algorithms and conditional
    lower bounds for planning problems. <i>Artificial Intelligence</i>. 2021;297(8).
    doi:<a href="https://doi.org/10.1016/j.artint.2021.103499">10.1016/j.artint.2021.103499</a>
  apa: Chatterjee, K., Dvořák, W., Henzinger, M. H., &#38; Svozil, A. (2021). Algorithms
    and conditional lower bounds for planning problems. <i>Artificial Intelligence</i>.
    Elsevier. <a href="https://doi.org/10.1016/j.artint.2021.103499">https://doi.org/10.1016/j.artint.2021.103499</a>
  chicago: Chatterjee, Krishnendu, Wolfgang Dvořák, Monika H Henzinger, and Alexander
    Svozil. “Algorithms and Conditional Lower Bounds for Planning Problems.” <i>Artificial
    Intelligence</i>. Elsevier, 2021. <a href="https://doi.org/10.1016/j.artint.2021.103499">https://doi.org/10.1016/j.artint.2021.103499</a>.
  ieee: K. Chatterjee, W. Dvořák, M. H. Henzinger, and A. Svozil, “Algorithms and
    conditional lower bounds for planning problems,” <i>Artificial Intelligence</i>,
    vol. 297, no. 8. Elsevier, 2021.
  ista: Chatterjee K, Dvořák W, Henzinger MH, Svozil A. 2021. Algorithms and conditional
    lower bounds for planning problems. Artificial Intelligence. 297(8), 103499.
  mla: Chatterjee, Krishnendu, et al. “Algorithms and Conditional Lower Bounds for
    Planning Problems.” <i>Artificial Intelligence</i>, vol. 297, no. 8, 103499, Elsevier,
    2021, doi:<a href="https://doi.org/10.1016/j.artint.2021.103499">10.1016/j.artint.2021.103499</a>.
  short: K. Chatterjee, W. Dvořák, M.H. Henzinger, A. Svozil, Artificial Intelligence
    297 (2021).
date_created: 2021-03-28T22:01:40Z
date_published: 2021-03-16T00:00:00Z
date_updated: 2023-09-26T10:41:42Z
day: '16'
department:
- _id: KrCh
doi: 10.1016/j.artint.2021.103499
external_id:
  arxiv:
  - '1804.07031'
  isi:
  - '000657537500003'
intvolume: '       297'
isi: 1
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1804.07031
month: '03'
oa: 1
oa_version: Preprint
publication: Artificial Intelligence
publication_identifier:
  issn:
  - 0004-3702
publication_status: published
publisher: Elsevier
quality_controlled: '1'
related_material:
  record:
  - id: '35'
    relation: earlier_version
    status: public
scopus_import: '1'
status: public
title: Algorithms and conditional lower bounds for planning problems
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 297
year: '2021'
...
---
_id: '9296'
abstract:
- lang: eng
  text: ' matching is compatible to two or more labeled point sets of size n with
    labels   {1,…,n}  if its straight-line drawing on each of these point sets is
    crossing-free. We study the maximum number of edges in a matching compatible to
    two or more labeled point sets in general position in the plane. We show that
    for any two labeled convex sets of n points there exists a compatible matching
    with   ⌊2n−−√⌋  edges. More generally, for any   ℓ  labeled point sets we construct
    compatible matchings of size   Ω(n1/ℓ) . As a corresponding upper bound, we use
    probabilistic arguments to show that for any   ℓ  given sets of n points there
    exists a labeling of each set such that the largest compatible matching has   O(n2/(ℓ+1))  edges.
    Finally, we show that   Θ(logn)  copies of any set of n points are necessary and
    sufficient for the existence of a labeling such that any compatible matching consists
    only of a single edge.'
acknowledgement: 'A.A. funded by the Marie Skłodowska-Curie grant agreement No. 754411.
  Z.M. partially funded by Wittgenstein Prize, Austrian Science Fund (FWF), grant
  no. Z 342-N31. I.P., D.P., and B.V. partially supported by FWF within the collaborative
  DACH project Arrangements and Drawings as FWF project I 3340-N35. A.P. supported
  by a Schrödinger fellowship of the FWF: J-3847-N35. J.T. partially supported by
  ERC Start grant no. (279307: Graph Games), FWF grant no. P23499-N23 and S11407-N23
  (RiSE).'
alternative_title:
- LNCS
article_processing_charge: No
arxiv: 1
author:
- first_name: Oswin
  full_name: Aichholzer, Oswin
  last_name: Aichholzer
- first_name: Alan M
  full_name: Arroyo Guevara, Alan M
  id: 3207FDC6-F248-11E8-B48F-1D18A9856A87
  last_name: Arroyo Guevara
  orcid: 0000-0003-2401-8670
- first_name: Zuzana
  full_name: Masárová, Zuzana
  id: 45CFE238-F248-11E8-B48F-1D18A9856A87
  last_name: Masárová
  orcid: 0000-0002-6660-1322
- first_name: Irene
  full_name: Parada, Irene
  last_name: Parada
- first_name: Daniel
  full_name: Perz, Daniel
  last_name: Perz
- first_name: Alexander
  full_name: Pilz, Alexander
  last_name: Pilz
- first_name: Josef
  full_name: Tkadlec, Josef
  id: 3F24CCC8-F248-11E8-B48F-1D18A9856A87
  last_name: Tkadlec
  orcid: 0000-0002-1097-9684
- first_name: Birgit
  full_name: Vogtenhuber, Birgit
  last_name: Vogtenhuber
citation:
  ama: 'Aichholzer O, Arroyo Guevara AM, Masárová Z, et al. On compatible matchings.
    In: <i>15th International Conference on Algorithms and Computation</i>. Vol 12635.
    Springer Nature; 2021:221-233. doi:<a href="https://doi.org/10.1007/978-3-030-68211-8_18">10.1007/978-3-030-68211-8_18</a>'
  apa: 'Aichholzer, O., Arroyo Guevara, A. M., Masárová, Z., Parada, I., Perz, D.,
    Pilz, A., … Vogtenhuber, B. (2021). On compatible matchings. In <i>15th International
    Conference on Algorithms and Computation</i> (Vol. 12635, pp. 221–233). Yangon,
    Myanmar: Springer Nature. <a href="https://doi.org/10.1007/978-3-030-68211-8_18">https://doi.org/10.1007/978-3-030-68211-8_18</a>'
  chicago: Aichholzer, Oswin, Alan M Arroyo Guevara, Zuzana Masárová, Irene Parada,
    Daniel Perz, Alexander Pilz, Josef Tkadlec, and Birgit Vogtenhuber. “On Compatible
    Matchings.” In <i>15th International Conference on Algorithms and Computation</i>,
    12635:221–33. Springer Nature, 2021. <a href="https://doi.org/10.1007/978-3-030-68211-8_18">https://doi.org/10.1007/978-3-030-68211-8_18</a>.
  ieee: O. Aichholzer <i>et al.</i>, “On compatible matchings,” in <i>15th International
    Conference on Algorithms and Computation</i>, Yangon, Myanmar, 2021, vol. 12635,
    pp. 221–233.
  ista: 'Aichholzer O, Arroyo Guevara AM, Masárová Z, Parada I, Perz D, Pilz A, Tkadlec
    J, Vogtenhuber B. 2021. On compatible matchings. 15th International Conference
    on Algorithms and Computation. WALCOM: Algorithms and Computation, LNCS, vol.
    12635, 221–233.'
  mla: Aichholzer, Oswin, et al. “On Compatible Matchings.” <i>15th International
    Conference on Algorithms and Computation</i>, vol. 12635, Springer Nature, 2021,
    pp. 221–33, doi:<a href="https://doi.org/10.1007/978-3-030-68211-8_18">10.1007/978-3-030-68211-8_18</a>.
  short: O. Aichholzer, A.M. Arroyo Guevara, Z. Masárová, I. Parada, D. Perz, A. Pilz,
    J. Tkadlec, B. Vogtenhuber, in:, 15th International Conference on Algorithms and
    Computation, Springer Nature, 2021, pp. 221–233.
conference:
  end_date: 2021-03-02
  location: Yangon, Myanmar
  name: 'WALCOM: Algorithms and Computation'
  start_date: 2021-02-28
date_created: 2021-03-28T22:01:41Z
date_published: 2021-02-16T00:00:00Z
date_updated: 2023-02-21T16:33:44Z
day: '16'
department:
- _id: UlWa
- _id: HeEd
- _id: KrCh
doi: 10.1007/978-3-030-68211-8_18
ec_funded: 1
external_id:
  arxiv:
  - '2101.03928'
intvolume: '     12635'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2101.03928
month: '02'
oa: 1
oa_version: Preprint
page: 221-233
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
- _id: 268116B8-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: Z00342
  name: The Wittgenstein Prize
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '279307'
  name: 'Quantitative Graph Games: Theory and Applications'
- _id: 2584A770-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: P 23499-N23
  name: Modern Graph Algorithmic Techniques in Formal Verification
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11407
  name: Game Theory
publication: 15th International Conference on Algorithms and Computation
publication_identifier:
  eissn:
  - '16113349'
  isbn:
  - '9783030682101'
  issn:
  - '03029743'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
  record:
  - id: '11938'
    relation: later_version
    status: public
scopus_import: '1'
status: public
title: On compatible matchings
type: conference
user_id: D865714E-FA4E-11E9-B85B-F5C5E5697425
volume: 12635
year: '2021'
...
---
_id: '9381'
abstract:
- lang: eng
  text: 'A game of rock-paper-scissors is an interesting example of an interaction
    where none of the pure strategies strictly dominates all others, leading to a
    cyclic pattern. In this work, we consider an unstable version of rock-paper-scissors
    dynamics and allow individuals to make behavioural mistakes during the strategy
    execution. We show that such an assumption can break a cyclic relationship leading
    to a stable equilibrium emerging with only one strategy surviving. We consider
    two cases: completely random mistakes when individuals have no bias towards any
    strategy and a general form of mistakes. Then, we determine conditions for a strategy
    to dominate all other strategies. However, given that individuals who adopt a
    dominating strategy are still prone to behavioural mistakes in the observed behaviour,
    we may still observe extinct strategies. That is, behavioural mistakes in strategy
    execution stabilise evolutionary dynamics leading to an evolutionary stable and,
    potentially, mixed co-existence equilibrium.'
acknowledgement: Authors would like to thank Christian Hilbe and Martin Nowak for
  their inspiring and very helpful feedback on the manuscript.
article_number: e1008523
article_processing_charge: No
article_type: original
author:
- first_name: Maria
  full_name: Kleshnina, Maria
  id: 4E21749C-F248-11E8-B48F-1D18A9856A87
  last_name: Kleshnina
- first_name: Sabrina S.
  full_name: Streipert, Sabrina S.
  last_name: Streipert
- first_name: Jerzy A.
  full_name: Filar, Jerzy A.
  last_name: Filar
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
citation:
  ama: Kleshnina M, Streipert SS, Filar JA, Chatterjee K. Mistakes can stabilise the
    dynamics of rock-paper-scissors games. <i>PLoS Computational Biology</i>. 2021;17(4).
    doi:<a href="https://doi.org/10.1371/journal.pcbi.1008523">10.1371/journal.pcbi.1008523</a>
  apa: Kleshnina, M., Streipert, S. S., Filar, J. A., &#38; Chatterjee, K. (2021).
    Mistakes can stabilise the dynamics of rock-paper-scissors games. <i>PLoS Computational
    Biology</i>. Public Library of Science. <a href="https://doi.org/10.1371/journal.pcbi.1008523">https://doi.org/10.1371/journal.pcbi.1008523</a>
  chicago: Kleshnina, Maria, Sabrina S. Streipert, Jerzy A. Filar, and Krishnendu
    Chatterjee. “Mistakes Can Stabilise the Dynamics of Rock-Paper-Scissors Games.”
    <i>PLoS Computational Biology</i>. Public Library of Science, 2021. <a href="https://doi.org/10.1371/journal.pcbi.1008523">https://doi.org/10.1371/journal.pcbi.1008523</a>.
  ieee: M. Kleshnina, S. S. Streipert, J. A. Filar, and K. Chatterjee, “Mistakes can
    stabilise the dynamics of rock-paper-scissors games,” <i>PLoS Computational Biology</i>,
    vol. 17, no. 4. Public Library of Science, 2021.
  ista: Kleshnina M, Streipert SS, Filar JA, Chatterjee K. 2021. Mistakes can stabilise
    the dynamics of rock-paper-scissors games. PLoS Computational Biology. 17(4),
    e1008523.
  mla: Kleshnina, Maria, et al. “Mistakes Can Stabilise the Dynamics of Rock-Paper-Scissors
    Games.” <i>PLoS Computational Biology</i>, vol. 17, no. 4, e1008523, Public Library
    of Science, 2021, doi:<a href="https://doi.org/10.1371/journal.pcbi.1008523">10.1371/journal.pcbi.1008523</a>.
  short: M. Kleshnina, S.S. Streipert, J.A. Filar, K. Chatterjee, PLoS Computational
    Biology 17 (2021).
date_created: 2021-05-09T22:01:38Z
date_published: 2021-04-01T00:00:00Z
date_updated: 2025-07-14T09:10:04Z
day: '01'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.1371/journal.pcbi.1008523
ec_funded: 1
external_id:
  isi:
  - '000639711200001'
file:
- access_level: open_access
  checksum: a94ebe0c4116f5047eaa6029e54d2dac
  content_type: application/pdf
  creator: kschuh
  date_created: 2021-05-11T13:50:06Z
  date_updated: 2021-05-11T13:50:06Z
  file_id: '9385'
  file_name: 2021_pcbi_Kleshnina.pdf
  file_size: 1323820
  relation: main_file
  success: 1
file_date_updated: 2021-05-11T13:50:06Z
has_accepted_license: '1'
intvolume: '        17'
isi: 1
issue: '4'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: PLoS Computational Biology
publication_identifier:
  eissn:
  - '15537358'
  issn:
  - 1553734X
publication_status: published
publisher: Public Library of Science
quality_controlled: '1'
scopus_import: '1'
status: public
title: Mistakes can stabilise the dynamics of rock-paper-scissors games
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 17
year: '2021'
...
---
_id: '9393'
abstract:
- lang: eng
  text: "We consider the core algorithmic problems related to verification of systems
    with respect to three classical quantitative properties, namely, the mean-payoff,
    the ratio, and the minimum initial credit for energy property. The algorithmic
    problem given a graph and a quantitative property asks to compute the optimal
    value (the infimum value over all traces) from every node of the graph. We consider
    graphs with bounded treewidth—a class that contains the control flow graphs of
    most programs. Let n denote the number of nodes of a graph, m the number of edges
    (for bounded treewidth \U0001D45A=\U0001D442(\U0001D45B)) and W the largest absolute
    value of the weights. Our main theoretical results are as follows. First, for
    the minimum initial credit problem we show that (1) for general graphs the problem
    can be solved in \U0001D442(\U0001D45B2⋅\U0001D45A) time and the associated decision
    problem in \U0001D442(\U0001D45B⋅\U0001D45A) time, improving the previous known
    \U0001D442(\U0001D45B3⋅\U0001D45A⋅log(\U0001D45B⋅\U0001D44A)) and \U0001D442(\U0001D45B2⋅\U0001D45A)
    bounds, respectively; and (2) for bounded treewidth graphs we present an algorithm
    that requires \U0001D442(\U0001D45B⋅log\U0001D45B) time. Second, for bounded treewidth
    graphs we present an algorithm that approximates the mean-payoff value within
    a factor of 1+\U0001D716 in time \U0001D442(\U0001D45B⋅log(\U0001D45B/\U0001D716))
    as compared to the classical exact algorithms on general graphs that require quadratic
    time. Third, for the ratio property we present an algorithm that for bounded treewidth
    graphs works in time \U0001D442(\U0001D45B⋅log(|\U0001D44E⋅\U0001D44F|))=\U0001D442(\U0001D45B⋅log(\U0001D45B⋅\U0001D44A)),
    when the output is \U0001D44E\U0001D44F, as compared to the previously best known
    algorithm on general graphs with running time \U0001D442(\U0001D45B2⋅log(\U0001D45B⋅\U0001D44A)).
    We have implemented some of our algorithms and show that they present a significant
    speedup on standard benchmarks."
acknowledgement: 'The research was partly supported by Austrian Science Fund (FWF)
  Grant No P23499- N23, FWF NFN Grant No S11407-N23 (RiSE/SHiNE), ERC Start Grant
  (279307: Graph Games), and Microsoft faculty fellows award.'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Rasmus
  full_name: Ibsen-Jensen, Rasmus
  id: 3B699956-F248-11E8-B48F-1D18A9856A87
  last_name: Ibsen-Jensen
  orcid: 0000-0003-4783-0389
- first_name: Andreas
  full_name: Pavlogiannis, Andreas
  id: 49704004-F248-11E8-B48F-1D18A9856A87
  last_name: Pavlogiannis
  orcid: 0000-0002-8943-0722
citation:
  ama: Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. Faster algorithms for quantitative
    verification in bounded treewidth graphs. <i>Formal Methods in System Design</i>.
    2021;57:401-428. doi:<a href="https://doi.org/10.1007/s10703-021-00373-5">10.1007/s10703-021-00373-5</a>
  apa: Chatterjee, K., Ibsen-Jensen, R., &#38; Pavlogiannis, A. (2021). Faster algorithms
    for quantitative verification in bounded treewidth graphs. <i>Formal Methods in
    System Design</i>. Springer. <a href="https://doi.org/10.1007/s10703-021-00373-5">https://doi.org/10.1007/s10703-021-00373-5</a>
  chicago: Chatterjee, Krishnendu, Rasmus Ibsen-Jensen, and Andreas Pavlogiannis.
    “Faster Algorithms for Quantitative Verification in Bounded Treewidth Graphs.”
    <i>Formal Methods in System Design</i>. Springer, 2021. <a href="https://doi.org/10.1007/s10703-021-00373-5">https://doi.org/10.1007/s10703-021-00373-5</a>.
  ieee: K. Chatterjee, R. Ibsen-Jensen, and A. Pavlogiannis, “Faster algorithms for
    quantitative verification in bounded treewidth graphs,” <i>Formal Methods in System
    Design</i>, vol. 57. Springer, pp. 401–428, 2021.
  ista: Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. 2021. Faster algorithms for
    quantitative verification in bounded treewidth graphs. Formal Methods in System
    Design. 57, 401–428.
  mla: Chatterjee, Krishnendu, et al. “Faster Algorithms for Quantitative Verification
    in Bounded Treewidth Graphs.” <i>Formal Methods in System Design</i>, vol. 57,
    Springer, 2021, pp. 401–28, doi:<a href="https://doi.org/10.1007/s10703-021-00373-5">10.1007/s10703-021-00373-5</a>.
  short: K. Chatterjee, R. Ibsen-Jensen, A. Pavlogiannis, Formal Methods in System
    Design 57 (2021) 401–428.
date_created: 2021-05-16T22:01:47Z
date_published: 2021-09-01T00:00:00Z
date_updated: 2023-10-10T11:13:20Z
day: '01'
department:
- _id: KrCh
doi: 10.1007/s10703-021-00373-5
ec_funded: 1
external_id:
  arxiv:
  - '1504.07384'
  isi:
  - '000645490300001'
intvolume: '        57'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1504.07384
month: '09'
oa: 1
oa_version: Preprint
page: 401-428
project:
- _id: 2584A770-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: P 23499-N23
  name: Modern Graph Algorithmic Techniques in Formal Verification
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S 11407_N23
  name: Rigorous Systems Engineering
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '279307'
  name: 'Quantitative Graph Games: Theory and Applications'
- _id: 2587B514-B435-11E9-9278-68D0E5697425
  name: Microsoft Research Faculty Fellowship
publication: Formal Methods in System Design
publication_identifier:
  eissn:
  - 1572-8102
  issn:
  - 0925-9856
publication_status: published
publisher: Springer
quality_controlled: '1'
scopus_import: '1'
status: public
title: Faster algorithms for quantitative verification in bounded treewidth graphs
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 57
year: '2021'
...
---
_id: '9402'
abstract:
- lang: eng
  text: Direct and indirect reciprocity are key mechanisms for the evolution of cooperation.
    Direct reciprocity means that individuals use their own experience to decide whether
    to cooperate with another person. Indirect reciprocity means that they also consider
    the experiences of others. Although these two mechanisms are intertwined, they
    are typically studied in isolation. Here, we introduce a mathematical framework
    that allows us to explore both kinds of reciprocity simultaneously. We show that
    the well-known ‘generous tit-for-tat’ strategy of direct reciprocity has a natural
    analogue in indirect reciprocity, which we call ‘generous scoring’. Using an equilibrium
    analysis, we characterize under which conditions either of the two strategies
    can maintain cooperation. With simulations, we additionally explore which kind
    of reciprocity evolves when members of a population engage in social learning
    to adapt to their environment. Our results draw unexpected connections between
    direct and indirect reciprocity while highlighting important differences regarding
    their evolvability.
acknowledgement: 'This work was supported by the European Research Council CoG 863818
  (ForM-SMArt) (to K.C.), the European Research Council Start Grant 279307: Graph
  Games (to K.C.), and the European Research Council Starting Grant 850529: E-DIRECT
  (to C.H.). The funders had no role in study design, data collection and analysis,
  decision to publish or preparation of the manuscript.'
article_processing_charge: No
article_type: original
author:
- first_name: Laura
  full_name: Schmid, Laura
  id: 38B437DE-F248-11E8-B48F-1D18A9856A87
  last_name: Schmid
  orcid: 0000-0002-6978-7329
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Christian
  full_name: Hilbe, Christian
  id: 2FDF8F3C-F248-11E8-B48F-1D18A9856A87
  last_name: Hilbe
  orcid: 0000-0001-5116-955X
- first_name: Martin A.
  full_name: Nowak, Martin A.
  last_name: Nowak
citation:
  ama: Schmid L, Chatterjee K, Hilbe C, Nowak MA. A unified framework of direct and
    indirect reciprocity. <i>Nature Human Behaviour</i>. 2021;5(10):1292–1302. doi:<a
    href="https://doi.org/10.1038/s41562-021-01114-8">10.1038/s41562-021-01114-8</a>
  apa: Schmid, L., Chatterjee, K., Hilbe, C., &#38; Nowak, M. A. (2021). A unified
    framework of direct and indirect reciprocity. <i>Nature Human Behaviour</i>. Springer
    Nature. <a href="https://doi.org/10.1038/s41562-021-01114-8">https://doi.org/10.1038/s41562-021-01114-8</a>
  chicago: Schmid, Laura, Krishnendu Chatterjee, Christian Hilbe, and Martin A. Nowak.
    “A Unified Framework of Direct and Indirect Reciprocity.” <i>Nature Human Behaviour</i>.
    Springer Nature, 2021. <a href="https://doi.org/10.1038/s41562-021-01114-8">https://doi.org/10.1038/s41562-021-01114-8</a>.
  ieee: L. Schmid, K. Chatterjee, C. Hilbe, and M. A. Nowak, “A unified framework
    of direct and indirect reciprocity,” <i>Nature Human Behaviour</i>, vol. 5, no.
    10. Springer Nature, pp. 1292–1302, 2021.
  ista: Schmid L, Chatterjee K, Hilbe C, Nowak MA. 2021. A unified framework of direct
    and indirect reciprocity. Nature Human Behaviour. 5(10), 1292–1302.
  mla: Schmid, Laura, et al. “A Unified Framework of Direct and Indirect Reciprocity.”
    <i>Nature Human Behaviour</i>, vol. 5, no. 10, Springer Nature, 2021, pp. 1292–1302,
    doi:<a href="https://doi.org/10.1038/s41562-021-01114-8">10.1038/s41562-021-01114-8</a>.
  short: L. Schmid, K. Chatterjee, C. Hilbe, M.A. Nowak, Nature Human Behaviour 5
    (2021) 1292–1302.
date_created: 2021-05-18T16:56:57Z
date_published: 2021-05-13T00:00:00Z
date_updated: 2025-07-14T09:10:09Z
day: '13'
ddc:
- '000'
department:
- _id: KrCh
- _id: GradSch
doi: 10.1038/s41562-021-01114-8
ec_funded: 1
external_id:
  isi:
  - '000650304000002'
  pmid:
  - '33986519'
file:
- access_level: open_access
  checksum: 34f55e173f90dc1dab731063458ac780
  content_type: application/pdf
  creator: dernst
  date_created: 2023-11-07T08:27:23Z
  date_updated: 2023-11-07T08:27:23Z
  file_id: '14496'
  file_name: 2021_NatureHumanBehaviour_Schmid_accepted.pdf
  file_size: 5232761
  relation: main_file
  success: 1
file_date_updated: 2023-11-07T08:27:23Z
has_accepted_license: '1'
intvolume: '         5'
isi: 1
issue: '10'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 1292–1302
pmid: 1
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '279307'
  name: 'Quantitative Graph Games: Theory and Applications'
publication: Nature Human Behaviour
publication_identifier:
  eissn:
  - 2397-3374
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
  link:
  - description: News on IST Homepage
    relation: press_release
    url: https://ist.ac.at/en/news/the-emergence-of-cooperation/
  record:
  - id: '10293'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: A unified framework of direct and indirect reciprocity
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2021'
...
---
_id: '9403'
abstract:
- lang: eng
  text: Optimal decision making requires individuals to know their available options
    and to anticipate correctly what consequences these options have. In many social
    interactions, however, we refrain from gathering all relevant information, even
    if this information would help us make better decisions and is costless to obtain.
    This chapter examines several examples of “deliberate ignorance.” Two simple models
    are proposed to illustrate how ignorance can evolve among self-interested and
    payoff - maximizing individuals, and open problems are highlighted that lie ahead
    for future research to explore.
article_processing_charge: No
author:
- first_name: Laura
  full_name: Schmid, Laura
  id: 38B437DE-F248-11E8-B48F-1D18A9856A87
  last_name: Schmid
  orcid: 0000-0002-6978-7329
- first_name: Christian
  full_name: Hilbe, Christian
  last_name: Hilbe
citation:
  ama: 'Schmid L, Hilbe C. The evolution of strategic ignorance in strategic interaction.
    In: Hertwig R, Engel C, eds. <i>Deliberate Ignorance: Choosing Not To Know</i>.
    Vol 29. Strüngmann Forum Reports. MIT Press; 2021:139-152.'
  apa: 'Schmid, L., &#38; Hilbe, C. (2021). The evolution of strategic ignorance in
    strategic interaction. In R. Hertwig &#38; C. Engel (Eds.), <i>Deliberate Ignorance:
    Choosing Not To Know</i> (Vol. 29, pp. 139–152). MIT Press.'
  chicago: 'Schmid, Laura, and Christian Hilbe. “The Evolution of Strategic Ignorance
    in Strategic Interaction.” In <i>Deliberate Ignorance: Choosing Not To Know</i>,
    edited by Ralph Hertwig and Christoph Engel, 29:139–52. Strüngmann Forum Reports.
    MIT Press, 2021.'
  ieee: 'L. Schmid and C. Hilbe, “The evolution of strategic ignorance in strategic
    interaction,” in <i>Deliberate Ignorance: Choosing Not To Know</i>, vol. 29, R.
    Hertwig and C. Engel, Eds. MIT Press, 2021, pp. 139–152.'
  ista: 'Schmid L, Hilbe C. 2021.The evolution of strategic ignorance in strategic
    interaction. In: Deliberate Ignorance: Choosing Not To Know. vol. 29, 139–152.'
  mla: 'Schmid, Laura, and Christian Hilbe. “The Evolution of Strategic Ignorance
    in Strategic Interaction.” <i>Deliberate Ignorance: Choosing Not To Know</i>,
    edited by Ralph Hertwig and Christoph Engel, vol. 29, MIT Press, 2021, pp. 139–52.'
  short: 'L. Schmid, C. Hilbe, in:, R. Hertwig, C. Engel (Eds.), Deliberate Ignorance:
    Choosing Not To Know, MIT Press, 2021, pp. 139–152.'
date_created: 2021-05-19T12:25:42Z
date_published: 2021-03-01T00:00:00Z
date_updated: 2023-02-23T13:57:04Z
day: '01'
department:
- _id: GradSch
- _id: KrCh
editor:
- first_name: Ralph
  full_name: Hertwig, Ralph
  last_name: Hertwig
- first_name: Christoph
  full_name: Engel, Christoph
  last_name: Engel
intvolume: '        29'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://esforum.de/publications/PDFs/sfr29/SFR29_09_Hilbe%20and%20Schmid.pdf
month: '03'
oa: 1
oa_version: Published Version
page: 139-152
publication: 'Deliberate Ignorance: Choosing Not To Know'
publication_identifier:
  isbn:
  - 978-0-262-04559-9
publisher: MIT Press
quality_controlled: '1'
series_title: Strüngmann Forum Reports
status: public
title: The evolution of strategic ignorance in strategic interaction
type: book_chapter
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 29
year: '2021'
...
---
_id: '10002'
abstract:
- lang: eng
  text: 'We present a faster symbolic algorithm for the following central problem
    in probabilistic verification: Compute the maximal end-component (MEC) decomposition
    of Markov decision processes (MDPs). This problem generalizes the SCC decomposition
    problem of graphs and closed recurrent sets of Markov chains. The model of symbolic
    algorithms is widely used in formal verification and model-checking, where access
    to the input model is restricted to only symbolic operations (e.g., basic set
    operations and computation of one-step neighborhood). For an input MDP with  n  vertices
    and  m  edges, the classical symbolic algorithm from the 1990s for the MEC decomposition
    requires  O(n2)  symbolic operations and  O(1)  symbolic space. The only other
    symbolic algorithm for the MEC decomposition requires  O(nm−−√)  symbolic operations
    and  O(m−−√)  symbolic space. A main open question is whether the worst-case  O(n2)  bound
    for symbolic operations can be beaten. We present a symbolic algorithm that requires  O˜(n1.5)  symbolic
    operations and  O˜(n−−√)  symbolic space. Moreover, the parametrization of our
    algorithm provides a trade-off between symbolic operations and symbolic space:
    for all  0<ϵ≤1/2  the symbolic algorithm requires  O˜(n2−ϵ)  symbolic operations
    and  O˜(nϵ)  symbolic space ( O˜  hides poly-logarithmic factors). Using our techniques
    we present faster algorithms for computing the almost-sure winning regions of  ω
    -regular objectives for MDPs. We consider the canonical parity objectives for  ω
    -regular objectives, and for parity objectives with  d -priorities we present
    an algorithm that computes the almost-sure winning region with  O˜(n2−ϵ)  symbolic
    operations and  O˜(nϵ)  symbolic space, for all  0<ϵ≤1/2 .'
acknowledgement: The authors are grateful to the anonymous referees for their valuable
  comments. A. S. is fully supported by the Vienna Science and Technology Fund (WWTF)
  through project ICT15–003. K. C. is supported by the Austrian Science Fund (FWF)
  NFN Grant No S11407-N23 (RiSE/SHiNE) and by the ERC CoG 863818 (ForM-SMArt). For
  M. H. the research leading to these results has received funding from the European
  Research Council under the European Unions Seventh Framework Programme (FP/2007–2013)
  / ERC Grant Agreement no. 340506.
article_processing_charge: No
arxiv: 1
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Wolfgang
  full_name: Dvorak, Wolfgang
  last_name: Dvorak
- first_name: Monika H
  full_name: Henzinger, Monika H
  id: 540c9bbd-f2de-11ec-812d-d04a5be85630
  last_name: Henzinger
  orcid: 0000-0002-5008-6530
- first_name: Alexander
  full_name: Svozil, Alexander
  last_name: Svozil
citation:
  ama: 'Chatterjee K, Dvorak W, Henzinger MH, Svozil A. Symbolic time and space tradeoffs
    for probabilistic verification. In: <i>Proceedings of the 36th Annual ACM/IEEE
    Symposium on Logic in Computer Science</i>. Institute of Electrical and Electronics
    Engineers; 2021:1-13. doi:<a href="https://doi.org/10.1109/LICS52264.2021.9470739">10.1109/LICS52264.2021.9470739</a>'
  apa: 'Chatterjee, K., Dvorak, W., Henzinger, M. H., &#38; Svozil, A. (2021). Symbolic
    time and space tradeoffs for probabilistic verification. In <i>Proceedings of
    the 36th Annual ACM/IEEE Symposium on Logic in Computer Science</i> (pp. 1–13).
    Rome, Italy: Institute of Electrical and Electronics Engineers. <a href="https://doi.org/10.1109/LICS52264.2021.9470739">https://doi.org/10.1109/LICS52264.2021.9470739</a>'
  chicago: Chatterjee, Krishnendu, Wolfgang Dvorak, Monika H Henzinger, and Alexander
    Svozil. “Symbolic Time and Space Tradeoffs for Probabilistic Verification.” In
    <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science</i>,
    1–13. Institute of Electrical and Electronics Engineers, 2021. <a href="https://doi.org/10.1109/LICS52264.2021.9470739">https://doi.org/10.1109/LICS52264.2021.9470739</a>.
  ieee: K. Chatterjee, W. Dvorak, M. H. Henzinger, and A. Svozil, “Symbolic time and
    space tradeoffs for probabilistic verification,” in <i>Proceedings of the 36th
    Annual ACM/IEEE Symposium on Logic in Computer Science</i>, Rome, Italy, 2021,
    pp. 1–13.
  ista: 'Chatterjee K, Dvorak W, Henzinger MH, Svozil A. 2021. Symbolic time and space
    tradeoffs for probabilistic verification. Proceedings of the 36th Annual ACM/IEEE
    Symposium on Logic in Computer Science. LICS: Symposium on Logic in Computer Science,
    1–13.'
  mla: Chatterjee, Krishnendu, et al. “Symbolic Time and Space Tradeoffs for Probabilistic
    Verification.” <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in
    Computer Science</i>, Institute of Electrical and Electronics Engineers, 2021,
    pp. 1–13, doi:<a href="https://doi.org/10.1109/LICS52264.2021.9470739">10.1109/LICS52264.2021.9470739</a>.
  short: K. Chatterjee, W. Dvorak, M.H. Henzinger, A. Svozil, in:, Proceedings of
    the 36th Annual ACM/IEEE Symposium on Logic in Computer Science, Institute of
    Electrical and Electronics Engineers, 2021, pp. 1–13.
conference:
  end_date: 2021-07-02
  location: Rome, Italy
  name: 'LICS: Symposium on Logic in Computer Science'
  start_date: 2021-06-29
date_created: 2021-09-12T22:01:24Z
date_published: 2021-07-07T00:00:00Z
date_updated: 2025-07-14T09:10:07Z
day: '07'
department:
- _id: KrCh
doi: 10.1109/LICS52264.2021.9470739
ec_funded: 1
external_id:
  arxiv:
  - '2104.07466'
  isi:
  - '000947350400089'
isi: 1
keyword:
- Computer science
- Computational modeling
- Markov processes
- Probabilistic logic
- Formal verification
- Game Theory
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2104.07466
month: '07'
oa: 1
oa_version: Preprint
page: 1-13
project:
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: S11407
  name: Game Theory
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer
  Science
publication_identifier:
  eisbn:
  - 978-1-6654-4895-6
  isbn:
  - 978-1-6654-4896-3
  issn:
  - 1043-6871
publication_status: published
publisher: Institute of Electrical and Electronics Engineers
quality_controlled: '1'
scopus_import: '1'
status: public
title: Symbolic time and space tradeoffs for probabilistic verification
type: conference
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
year: '2021'
...
---
_id: '10004'
abstract:
- lang: eng
  text: 'Markov chains are the de facto finite-state model for stochastic dynamical
    systems, and Markov decision processes (MDPs) extend Markov chains by incorporating
    non-deterministic behaviors. Given an MDP and rewards on states, a classical optimization
    criterion is the maximal expected total reward where the MDP stops after T steps,
    which can be computed by a simple dynamic programming algorithm. We consider a
    natural generalization of the problem where the stopping times can be chosen according
    to a probability distribution, such that the expected stopping time is T, to optimize
    the expected total reward. Quite surprisingly we establish inter-reducibility
    of the expected stopping-time problem for Markov chains with the Positivity problem
    (which is related to the well-known Skolem problem), for which establishing either
    decidability or undecidability would be a major breakthrough. Given the hardness
    of the exact problem, we consider the approximate version of the problem: we show
    that it can be solved in exponential time for Markov chains and in exponential
    space for MDPs.'
acknowledgement: We are grateful to the anonymous reviewers of LICS 2021 and of a
  previous version of this paper for insightful comments that helped improving the
  presentation. This research was partially supported by the grant ERC CoG 863818
  (ForM-SMArt).
article_processing_charge: No
arxiv: 1
author:
- first_name: Krishnendu
  full_name: Chatterjee, Krishnendu
  id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
  last_name: Chatterjee
  orcid: 0000-0002-4561-241X
- first_name: Laurent
  full_name: Doyen, Laurent
  last_name: Doyen
citation:
  ama: 'Chatterjee K, Doyen L. Stochastic processes with expected stopping time. In:
    <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science</i>.
    Institute of Electrical and Electronics Engineers; 2021:1-13. doi:<a href="https://doi.org/10.1109/LICS52264.2021.9470595">10.1109/LICS52264.2021.9470595</a>'
  apa: 'Chatterjee, K., &#38; Doyen, L. (2021). Stochastic processes with expected
    stopping time. In <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic
    in Computer Science</i> (pp. 1–13). Rome, Italy: Institute of Electrical and Electronics
    Engineers. <a href="https://doi.org/10.1109/LICS52264.2021.9470595">https://doi.org/10.1109/LICS52264.2021.9470595</a>'
  chicago: Chatterjee, Krishnendu, and Laurent Doyen. “Stochastic Processes with Expected
    Stopping Time.” In <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic
    in Computer Science</i>, 1–13. Institute of Electrical and Electronics Engineers,
    2021. <a href="https://doi.org/10.1109/LICS52264.2021.9470595">https://doi.org/10.1109/LICS52264.2021.9470595</a>.
  ieee: K. Chatterjee and L. Doyen, “Stochastic processes with expected stopping time,”
    in <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science</i>,
    Rome, Italy, 2021, pp. 1–13.
  ista: 'Chatterjee K, Doyen L. 2021. Stochastic processes with expected stopping
    time. Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science.
    LICS: Symposium on Logic in Computer Science, 1–13.'
  mla: Chatterjee, Krishnendu, and Laurent Doyen. “Stochastic Processes with Expected
    Stopping Time.” <i>Proceedings of the 36th Annual ACM/IEEE Symposium on Logic
    in Computer Science</i>, Institute of Electrical and Electronics Engineers, 2021,
    pp. 1–13, doi:<a href="https://doi.org/10.1109/LICS52264.2021.9470595">10.1109/LICS52264.2021.9470595</a>.
  short: K. Chatterjee, L. Doyen, in:, Proceedings of the 36th Annual ACM/IEEE Symposium
    on Logic in Computer Science, Institute of Electrical and Electronics Engineers,
    2021, pp. 1–13.
conference:
  end_date: 2021-07-02
  location: Rome, Italy
  name: 'LICS: Symposium on Logic in Computer Science'
  start_date: 2021-06-29
date_created: 2021-09-12T22:01:25Z
date_published: 2021-07-07T00:00:00Z
date_updated: 2025-07-14T09:10:08Z
day: '07'
department:
- _id: KrCh
doi: 10.1109/LICS52264.2021.9470595
ec_funded: 1
external_id:
  arxiv:
  - '2104.07278'
  isi:
  - '000947350400036'
isi: 1
keyword:
- Computer science
- Heuristic algorithms
- Memory management
- Automata
- Markov processes
- Probability distribution
- Complexity theory
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2104.07278
month: '07'
oa: 1
oa_version: Preprint
page: 1-13
project:
- _id: 0599E47C-7A3F-11EA-A408-12923DDC885E
  call_identifier: H2020
  grant_number: '863818'
  name: 'Formal Methods for Stochastic Models: Algorithms and Applications'
publication: Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer
  Science
publication_identifier:
  eisbn:
  - 978-1-6654-4895-6
  isbn:
  - 978-1-6654-4896-3
  issn:
  - 1043-6871
publication_status: published
publisher: Institute of Electrical and Electronics Engineers
quality_controlled: '1'
scopus_import: '1'
status: public
title: Stochastic processes with expected stopping time
type: conference
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
year: '2021'
...
---
_id: '10052'
abstract:
- lang: eng
  text: "A deterministic finite automaton (DFA) \U0001D49C is composite if its language
    L(\U0001D49C) can be decomposed into an intersection ⋂_{i = 1}^k L(\U0001D49C_i)
    of languages of smaller DFAs. Otherwise, \U0001D49C is prime. This notion of primality
    was introduced by Kupferman and Mosheiff in 2013, and while they proved that we
    can decide whether a DFA is composite, the precise complexity of this problem
    is still open, with a doubly-exponential gap between the upper and lower bounds.
    In this work, we focus on permutation DFAs, i.e., those for which the transition
    monoid is a group. We provide an NP algorithm to decide whether a permutation
    DFA is composite, and show that the difficulty of this problem comes from the
    number of non-accepting states of the instance: we give a fixed-parameter tractable
    algorithm with the number of rejecting states as the parameter. Moreover, we investigate
    the class of commutative permutation DFAs. Their structural properties allow us
    to decide compositionality in NL, and even in LOGSPACE if the alphabet size is
    fixed. Despite this low complexity, we show that complex behaviors still arise
    in this class: we provide a family of composite DFAs each requiring polynomially
    many factors with respect to its size. We also consider the variant of the problem
    that asks whether a DFA is k-factor composite, that is, decomposable into k smaller
    DFAs, for some given integer k ∈ ℕ. We show that, for commutative permutation
    DFAs, restricting the number of factors makes the decision computationally harder,
    and yields a problem with tight bounds: it is NP-complete. Finally, we show that
    in general, this problem is in PSPACE, and it is in LOGSPACE for DFAs with a singleton
    alphabet."
acknowledgement: "Ismaël Jecker: Marie Skłodowska-Curie Grant Agreement No. 754411.
  Nicolas Mazzocchi: BOSCO project PGC2018-102210-B-I00 (MCIU/AEI/FEDER, UE), BLOQUESCM
  project S2018/TCS-4339, and MINECO grant RYC-2016-20281.\r\nPetra Wolf : DFG project
  FE 560/9-1.\r\n"
alternative_title:
- LIPIcs
article_number: '18'
article_processing_charge: No
arxiv: 1
author:
- first_name: Ismael R
  full_name: Jecker, Ismael R
  id: 85D7C63E-7D5D-11E9-9C0F-98C4E5697425
  last_name: Jecker
- first_name: Nicolas
  full_name: Mazzocchi, Nicolas
  last_name: Mazzocchi
- first_name: Petra
  full_name: Wolf, Petra
  last_name: Wolf
citation:
  ama: 'Jecker IR, Mazzocchi N, Wolf P. Decomposing permutation automata. In: <i>32nd
    International Conference on Concurrency Theory</i>. Vol 203. Schloss Dagstuhl
    - Leibniz Zentrum für Informatik; 2021. doi:<a href="https://doi.org/10.4230/LIPIcs.CONCUR.2021.18">10.4230/LIPIcs.CONCUR.2021.18</a>'
  apa: 'Jecker, I. R., Mazzocchi, N., &#38; Wolf, P. (2021). Decomposing permutation
    automata. In <i>32nd International Conference on Concurrency Theory</i> (Vol.
    203). Paris, France: Schloss Dagstuhl - Leibniz Zentrum für Informatik. <a href="https://doi.org/10.4230/LIPIcs.CONCUR.2021.18">https://doi.org/10.4230/LIPIcs.CONCUR.2021.18</a>'
  chicago: Jecker, Ismael R, Nicolas Mazzocchi, and Petra Wolf. “Decomposing Permutation
    Automata.” In <i>32nd International Conference on Concurrency Theory</i>, Vol.
    203. Schloss Dagstuhl - Leibniz Zentrum für Informatik, 2021. <a href="https://doi.org/10.4230/LIPIcs.CONCUR.2021.18">https://doi.org/10.4230/LIPIcs.CONCUR.2021.18</a>.
  ieee: I. R. Jecker, N. Mazzocchi, and P. Wolf, “Decomposing permutation automata,”
    in <i>32nd International Conference on Concurrency Theory</i>, Paris, France,
    2021, vol. 203.
  ista: 'Jecker IR, Mazzocchi N, Wolf P. 2021. Decomposing permutation automata. 32nd
    International Conference on Concurrency Theory. CONCUR: Conference on Concurrency
    Theory, LIPIcs, vol. 203, 18.'
  mla: Jecker, Ismael R., et al. “Decomposing Permutation Automata.” <i>32nd International
    Conference on Concurrency Theory</i>, vol. 203, 18, Schloss Dagstuhl - Leibniz
    Zentrum für Informatik, 2021, doi:<a href="https://doi.org/10.4230/LIPIcs.CONCUR.2021.18">10.4230/LIPIcs.CONCUR.2021.18</a>.
  short: I.R. Jecker, N. Mazzocchi, P. Wolf, in:, 32nd International Conference on
    Concurrency Theory, Schloss Dagstuhl - Leibniz Zentrum für Informatik, 2021.
conference:
  end_date: 2021-08-27
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date_published: 2021-08-13T00:00:00Z
date_updated: 2022-05-13T08:12:52Z
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ddc:
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doi: 10.4230/LIPIcs.CONCUR.2021.18
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  arxiv:
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title: Decomposing permutation automata
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