---
_id: '10817'
abstract:
- lang: eng
  text: The Morse-Smale complex can be either explicitly or implicitly represented.
    Depending on the type of representation, the simplification of the Morse-Smale
    complex works differently. In the explicit representation, the Morse-Smale complex
    is directly simplified by explicitly reconnecting the critical points during the
    simplification. In the implicit representation, on the other hand, the Morse-Smale
    complex is given by a combinatorial gradient field. In this setting, the simplification
    changes the combinatorial flow, which yields an indirect simplification of the
    Morse-Smale complex. The topological complexity of the Morse-Smale complex is
    reduced in both representations. However, the simplifications generally yield
    different results. In this chapter, we emphasize properties of the two representations
    that cause these differences. We also provide a complexity analysis of the two
    schemes with respect to running time and memory consumption.
acknowledgement: This research is supported and funded by the Digiteo unTopoVis project,
  the TOPOSYS project FP7-ICT-318493-STREP, and MPC-VCC.
article_processing_charge: No
author:
- first_name: David
  full_name: Günther, David
  last_name: Günther
- first_name: Jan
  full_name: Reininghaus, Jan
  id: 4505473A-F248-11E8-B48F-1D18A9856A87
  last_name: Reininghaus
- first_name: Hans-Peter
  full_name: Seidel, Hans-Peter
  last_name: Seidel
- first_name: Tino
  full_name: Weinkauf, Tino
  last_name: Weinkauf
citation:
  ama: 'Günther D, Reininghaus J, Seidel H-P, Weinkauf T. Notes on the simplification
    of the Morse-Smale complex. In: Bremer P-T, Hotz I, Pascucci V, Peikert R, eds.
    <i>Topological Methods in Data Analysis and Visualization III.</i> Mathematics
    and Visualization. Cham: Springer Nature; 2014:135-150. doi:<a href="https://doi.org/10.1007/978-3-319-04099-8_9">10.1007/978-3-319-04099-8_9</a>'
  apa: 'Günther, D., Reininghaus, J., Seidel, H.-P., &#38; Weinkauf, T. (2014). Notes
    on the simplification of the Morse-Smale complex. In P.-T. Bremer, I. Hotz, V.
    Pascucci, &#38; R. Peikert (Eds.), <i>Topological Methods in Data Analysis and
    Visualization III.</i> (pp. 135–150). Cham: Springer Nature. <a href="https://doi.org/10.1007/978-3-319-04099-8_9">https://doi.org/10.1007/978-3-319-04099-8_9</a>'
  chicago: 'Günther, David, Jan Reininghaus, Hans-Peter Seidel, and Tino Weinkauf.
    “Notes on the Simplification of the Morse-Smale Complex.” In <i>Topological Methods
    in Data Analysis and Visualization III.</i>, edited by Peer-Timo Bremer, Ingrid
    Hotz, Valerio Pascucci, and Ronald Peikert, 135–50. Mathematics and Visualization.
    Cham: Springer Nature, 2014. <a href="https://doi.org/10.1007/978-3-319-04099-8_9">https://doi.org/10.1007/978-3-319-04099-8_9</a>.'
  ieee: 'D. Günther, J. Reininghaus, H.-P. Seidel, and T. Weinkauf, “Notes on the
    simplification of the Morse-Smale complex,” in <i>Topological Methods in Data
    Analysis and Visualization III.</i>, P.-T. Bremer, I. Hotz, V. Pascucci, and R.
    Peikert, Eds. Cham: Springer Nature, 2014, pp. 135–150.'
  ista: 'Günther D, Reininghaus J, Seidel H-P, Weinkauf T. 2014.Notes on the simplification
    of the Morse-Smale complex. In: Topological Methods in Data Analysis and Visualization
    III. , 135–150.'
  mla: Günther, David, et al. “Notes on the Simplification of the Morse-Smale Complex.”
    <i>Topological Methods in Data Analysis and Visualization III.</i>, edited by
    Peer-Timo Bremer et al., Springer Nature, 2014, pp. 135–50, doi:<a href="https://doi.org/10.1007/978-3-319-04099-8_9">10.1007/978-3-319-04099-8_9</a>.
  short: D. Günther, J. Reininghaus, H.-P. Seidel, T. Weinkauf, in:, P.-T. Bremer,
    I. Hotz, V. Pascucci, R. Peikert (Eds.), Topological Methods in Data Analysis
    and Visualization III., Springer Nature, Cham, 2014, pp. 135–150.
date_created: 2022-03-04T08:33:57Z
date_published: 2014-03-19T00:00:00Z
date_updated: 2023-09-05T15:33:45Z
day: '19'
department:
- _id: HeEd
doi: 10.1007/978-3-319-04099-8_9
ec_funded: 1
editor:
- first_name: Peer-Timo
  full_name: Bremer, Peer-Timo
  last_name: Bremer
- first_name: Ingrid
  full_name: Hotz, Ingrid
  last_name: Hotz
- first_name: Valerio
  full_name: Pascucci, Valerio
  last_name: Pascucci
- first_name: Ronald
  full_name: Peikert, Ronald
  last_name: Peikert
language:
- iso: eng
month: '03'
oa_version: None
page: 135-150
place: Cham
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: Topological Methods in Data Analysis and Visualization III.
publication_identifier:
  eisbn:
  - '9783319040998'
  eissn:
  - 2197-666X
  isbn:
  - '9783319040981'
  issn:
  - 1612-3786
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
series_title: Mathematics and Visualization
status: public
title: Notes on the simplification of the Morse-Smale complex
type: book_chapter
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2014'
...
---
_id: '10886'
abstract:
- lang: eng
  text: We propose a method for visualizing two-dimensional symmetric positive definite
    tensor fields using the Heat Kernel Signature (HKS). The HKS is derived from the
    heat kernel and was originally introduced as an isometry invariant shape signature.
    Each positive definite tensor field defines a Riemannian manifold by considering
    the tensor field as a Riemannian metric. On this Riemmanian manifold we can apply
    the definition of the HKS. The resulting scalar quantity is used for the visualization
    of tensor fields. The HKS is closely related to the Gaussian curvature of the
    Riemannian manifold and the time parameter of the heat kernel allows a multiscale
    analysis in a natural way. In this way, the HKS represents field related scale
    space properties, enabling a level of detail analysis of tensor fields. This makes
    the HKS an interesting new scalar quantity for tensor fields, which differs significantly
    from usual tensor invariants like the trace or the determinant. A method for visualization
    and a numerical realization of the HKS for tensor fields is proposed in this chapter.
    To validate the approach we apply it to some illustrating simple examples as isolated
    critical points and to a medical diffusion tensor data set.
acknowledgement: This research is partially supported by the TOPOSYS project FP7-ICT-318493-STREP.
alternative_title:
- Mathematics and Visualization
article_processing_charge: No
author:
- first_name: Valentin
  full_name: Zobel, Valentin
  last_name: Zobel
- first_name: Jan
  full_name: Reininghaus, Jan
  id: 4505473A-F248-11E8-B48F-1D18A9856A87
  last_name: Reininghaus
- first_name: Ingrid
  full_name: Hotz, Ingrid
  last_name: Hotz
citation:
  ama: 'Zobel V, Reininghaus J, Hotz I. Visualization of two-dimensional symmetric
    positive definite tensor fields using the heat kernel signature. In: <i>Topological
    Methods in Data Analysis and Visualization III </i>. Springer; 2014:249-262. doi:<a
    href="https://doi.org/10.1007/978-3-319-04099-8_16">10.1007/978-3-319-04099-8_16</a>'
  apa: Zobel, V., Reininghaus, J., &#38; Hotz, I. (2014). Visualization of two-dimensional
    symmetric positive definite tensor fields using the heat kernel signature. In
    <i>Topological Methods in Data Analysis and Visualization III </i> (pp. 249–262).
    Springer. <a href="https://doi.org/10.1007/978-3-319-04099-8_16">https://doi.org/10.1007/978-3-319-04099-8_16</a>
  chicago: Zobel, Valentin, Jan Reininghaus, and Ingrid Hotz. “Visualization of Two-Dimensional
    Symmetric Positive Definite Tensor Fields Using the Heat Kernel Signature.” In
    <i>Topological Methods in Data Analysis and Visualization III </i>, 249–62. Springer,
    2014. <a href="https://doi.org/10.1007/978-3-319-04099-8_16">https://doi.org/10.1007/978-3-319-04099-8_16</a>.
  ieee: V. Zobel, J. Reininghaus, and I. Hotz, “Visualization of two-dimensional symmetric
    positive definite tensor fields using the heat kernel signature,” in <i>Topological
    Methods in Data Analysis and Visualization III </i>, 2014, pp. 249–262.
  ista: Zobel V, Reininghaus J, Hotz I. 2014. Visualization of two-dimensional symmetric
    positive definite tensor fields using the heat kernel signature. Topological Methods
    in Data Analysis and Visualization III . , Mathematics and Visualization, , 249–262.
  mla: Zobel, Valentin, et al. “Visualization of Two-Dimensional Symmetric Positive
    Definite Tensor Fields Using the Heat Kernel Signature.” <i>Topological Methods
    in Data Analysis and Visualization III </i>, Springer, 2014, pp. 249–62, doi:<a
    href="https://doi.org/10.1007/978-3-319-04099-8_16">10.1007/978-3-319-04099-8_16</a>.
  short: V. Zobel, J. Reininghaus, I. Hotz, in:, Topological Methods in Data Analysis
    and Visualization III , Springer, 2014, pp. 249–262.
date_created: 2022-03-18T13:05:39Z
date_published: 2014-03-19T00:00:00Z
date_updated: 2023-09-05T14:13:16Z
day: '19'
department:
- _id: HeEd
doi: 10.1007/978-3-319-04099-8_16
language:
- iso: eng
month: '03'
oa_version: None
page: 249-262
publication: 'Topological Methods in Data Analysis and Visualization III '
publication_identifier:
  eisbn:
  - '9783319040998'
  eissn:
  - 2197-666X
  isbn:
  - '9783319040981'
  issn:
  - 1612-3786
publication_status: published
publisher: Springer
quality_controlled: '1'
scopus_import: '1'
status: public
title: Visualization of two-dimensional symmetric positive definite tensor fields
  using the heat kernel signature
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2014'
...
---
_id: '10892'
abstract:
- lang: eng
  text: "In this paper, we introduce planar matchings on directed pseudo-line arrangements,
    which yield a planar set of pseudo-line segments such that only matching-partners
    are adjacent. By translating the planar matching problem into a corresponding
    stable roommates problem we show that such matchings always exist.\r\nUsing our
    new framework, we establish, for the first time, a complete, rigorous definition
    of weighted straight skeletons, which are based on a so-called wavefront propagation
    process. We present a generalized and unified approach to treat structural changes
    in the wavefront that focuses on the restoration of weak planarity by finding
    planar matchings."
acknowledgement: 'T. Biedl was supported by NSERC and the Ross and Muriel Cheriton
  Fellowship. P. Palfrader was supported by Austrian Science Fund (FWF): P25816-N15.'
alternative_title:
- LNCS
article_processing_charge: No
author:
- first_name: Therese
  full_name: Biedl, Therese
  last_name: Biedl
- first_name: Stefan
  full_name: Huber, Stefan
  id: 4700A070-F248-11E8-B48F-1D18A9856A87
  last_name: Huber
  orcid: 0000-0002-8871-5814
- first_name: Peter
  full_name: Palfrader, Peter
  last_name: Palfrader
citation:
  ama: 'Biedl T, Huber S, Palfrader P. Planar matchings for weighted straight skeletons.
    In: <i>25th International Symposium, ISAAC 2014</i>. Vol 8889. Springer Nature;
    2014:117-127. doi:<a href="https://doi.org/10.1007/978-3-319-13075-0_10">10.1007/978-3-319-13075-0_10</a>'
  apa: 'Biedl, T., Huber, S., &#38; Palfrader, P. (2014). Planar matchings for weighted
    straight skeletons. In <i>25th International Symposium, ISAAC 2014</i> (Vol. 8889,
    pp. 117–127). Jeonju, Korea: Springer Nature. <a href="https://doi.org/10.1007/978-3-319-13075-0_10">https://doi.org/10.1007/978-3-319-13075-0_10</a>'
  chicago: Biedl, Therese, Stefan Huber, and Peter Palfrader. “Planar Matchings for
    Weighted Straight Skeletons.” In <i>25th International Symposium, ISAAC 2014</i>,
    8889:117–27. Springer Nature, 2014. <a href="https://doi.org/10.1007/978-3-319-13075-0_10">https://doi.org/10.1007/978-3-319-13075-0_10</a>.
  ieee: T. Biedl, S. Huber, and P. Palfrader, “Planar matchings for weighted straight
    skeletons,” in <i>25th International Symposium, ISAAC 2014</i>, Jeonju, Korea,
    2014, vol. 8889, pp. 117–127.
  ista: 'Biedl T, Huber S, Palfrader P. 2014. Planar matchings for weighted straight
    skeletons. 25th International Symposium, ISAAC 2014. ISAAC: International Symposium
    on Algorithms and Computation, LNCS, vol. 8889, 117–127.'
  mla: Biedl, Therese, et al. “Planar Matchings for Weighted Straight Skeletons.”
    <i>25th International Symposium, ISAAC 2014</i>, vol. 8889, Springer Nature, 2014,
    pp. 117–27, doi:<a href="https://doi.org/10.1007/978-3-319-13075-0_10">10.1007/978-3-319-13075-0_10</a>.
  short: T. Biedl, S. Huber, P. Palfrader, in:, 25th International Symposium, ISAAC
    2014, Springer Nature, 2014, pp. 117–127.
conference:
  end_date: 2014-12-17
  location: Jeonju, Korea
  name: 'ISAAC: International Symposium on Algorithms and Computation'
  start_date: 2014-12-15
date_created: 2022-03-21T07:09:03Z
date_published: 2014-11-08T00:00:00Z
date_updated: 2023-02-23T12:20:55Z
day: '08'
department:
- _id: HeEd
doi: 10.1007/978-3-319-13075-0_10
intvolume: '      8889'
language:
- iso: eng
month: '11'
oa_version: None
page: 117-127
publication: 25th International Symposium, ISAAC 2014
publication_identifier:
  eisbn:
  - '9783319130750'
  eissn:
  - 1611-3349
  isbn:
  - '9783319130743'
  issn:
  - 0302-9743
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
  record:
  - id: '481'
    relation: later_version
    status: public
scopus_import: '1'
status: public
title: Planar matchings for weighted straight skeletons
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8889
year: '2014'
...
---
_id: '10893'
abstract:
- lang: eng
  text: Saddle periodic orbits are an essential and stable part of the topological
    skeleton of a 3D vector field. Nevertheless, there is currently no efficient algorithm
    to robustly extract these features. In this chapter, we present a novel technique
    to extract saddle periodic orbits. Exploiting the analytic properties of such
    an orbit, we propose a scalar measure based on the finite-time Lyapunov exponent
    (FTLE) that indicates its presence. Using persistent homology, we can then extract
    the robust cycles of this field. These cycles thereby represent the saddle periodic
    orbits of the given vector field. We discuss the different existing FTLE approximation
    schemes regarding their applicability to this specific problem and propose an
    adapted version of FTLE called Normalized Velocity Separation. Finally, we evaluate
    our method using simple analytic vector field data.
acknowledgement: First, we thank the reviewers of this paper for their ideas and critical
  comments. In addition, we thank Ronny Peikert and Filip Sadlo for a fruitful discussions.
  This research is supported by the European Commission under the TOPOSYS project
  FP7-ICT-318493-STREP, the European Social Fund (ESF App. No. 100098251), and the
  European Science Foundation under the ACAT Research Network Program.
article_processing_charge: No
author:
- first_name: Jens
  full_name: Kasten, Jens
  last_name: Kasten
- first_name: Jan
  full_name: Reininghaus, Jan
  id: 4505473A-F248-11E8-B48F-1D18A9856A87
  last_name: Reininghaus
- first_name: Wieland
  full_name: Reich, Wieland
  last_name: Reich
- first_name: Gerik
  full_name: Scheuermann, Gerik
  last_name: Scheuermann
citation:
  ama: 'Kasten J, Reininghaus J, Reich W, Scheuermann G. Toward the extraction of
    saddle periodic orbits. In: Bremer P-T, Hotz I, Pascucci V, Peikert R, eds. <i>Topological
    Methods in Data Analysis and Visualization III </i>. Vol 1. Mathematics and Visualization.
    Cham: Springer; 2014:55-69. doi:<a href="https://doi.org/10.1007/978-3-319-04099-8_4">10.1007/978-3-319-04099-8_4</a>'
  apa: 'Kasten, J., Reininghaus, J., Reich, W., &#38; Scheuermann, G. (2014). Toward
    the extraction of saddle periodic orbits. In P.-T. Bremer, I. Hotz, V. Pascucci,
    &#38; R. Peikert (Eds.), <i>Topological Methods in Data Analysis and Visualization
    III </i> (Vol. 1, pp. 55–69). Cham: Springer. <a href="https://doi.org/10.1007/978-3-319-04099-8_4">https://doi.org/10.1007/978-3-319-04099-8_4</a>'
  chicago: 'Kasten, Jens, Jan Reininghaus, Wieland Reich, and Gerik Scheuermann. “Toward
    the Extraction of Saddle Periodic Orbits.” In <i>Topological Methods in Data Analysis
    and Visualization III </i>, edited by Peer-Timo Bremer, Ingrid Hotz, Valerio Pascucci,
    and Ronald Peikert, 1:55–69. Mathematics and Visualization. Cham: Springer, 2014.
    <a href="https://doi.org/10.1007/978-3-319-04099-8_4">https://doi.org/10.1007/978-3-319-04099-8_4</a>.'
  ieee: 'J. Kasten, J. Reininghaus, W. Reich, and G. Scheuermann, “Toward the extraction
    of saddle periodic orbits,” in <i>Topological Methods in Data Analysis and Visualization
    III </i>, vol. 1, P.-T. Bremer, I. Hotz, V. Pascucci, and R. Peikert, Eds. Cham:
    Springer, 2014, pp. 55–69.'
  ista: 'Kasten J, Reininghaus J, Reich W, Scheuermann G. 2014.Toward the extraction
    of saddle periodic orbits. In: Topological Methods in Data Analysis and Visualization
    III . vol. 1, 55–69.'
  mla: Kasten, Jens, et al. “Toward the Extraction of Saddle Periodic Orbits.” <i>Topological
    Methods in Data Analysis and Visualization III </i>, edited by Peer-Timo Bremer
    et al., vol. 1, Springer, 2014, pp. 55–69, doi:<a href="https://doi.org/10.1007/978-3-319-04099-8_4">10.1007/978-3-319-04099-8_4</a>.
  short: J. Kasten, J. Reininghaus, W. Reich, G. Scheuermann, in:, P.-T. Bremer, I.
    Hotz, V. Pascucci, R. Peikert (Eds.), Topological Methods in Data Analysis and
    Visualization III , Springer, Cham, 2014, pp. 55–69.
date_created: 2022-03-21T07:11:23Z
date_published: 2014-03-19T00:00:00Z
date_updated: 2022-06-21T12:01:47Z
day: '19'
department:
- _id: HeEd
doi: 10.1007/978-3-319-04099-8_4
ec_funded: 1
editor:
- first_name: Peer-Timo
  full_name: Bremer, Peer-Timo
  last_name: Bremer
- first_name: Ingrid
  full_name: Hotz, Ingrid
  last_name: Hotz
- first_name: Valerio
  full_name: Pascucci, Valerio
  last_name: Pascucci
- first_name: Ronald
  full_name: Peikert, Ronald
  last_name: Peikert
intvolume: '         1'
language:
- iso: eng
month: '03'
oa_version: None
page: 55-69
place: Cham
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: 'Topological Methods in Data Analysis and Visualization III '
publication_identifier:
  eisbn:
  - '9783319040998'
  eissn:
  - 2197-666X
  isbn:
  - '9783319040981'
  issn:
  - 1612-3786
publication_status: published
publisher: Springer
quality_controlled: '1'
scopus_import: '1'
series_title: Mathematics and Visualization
status: public
title: Toward the extraction of saddle periodic orbits
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1
year: '2014'
...
---
_id: '10894'
abstract:
- lang: eng
  text: PHAT is a C++ library for the computation of persistent homology by matrix
    reduction. We aim for a simple generic design that decouples algorithms from data
    structures without sacrificing efficiency or user-friendliness. This makes PHAT
    a versatile platform for experimenting with algorithmic ideas and comparing them
    to state of the art implementations.
article_processing_charge: No
author:
- first_name: Ulrich
  full_name: Bauer, Ulrich
  id: 2ADD483A-F248-11E8-B48F-1D18A9856A87
  last_name: Bauer
  orcid: 0000-0002-9683-0724
- first_name: Michael
  full_name: Kerber, Michael
  last_name: Kerber
- first_name: Jan
  full_name: Reininghaus, Jan
  id: 4505473A-F248-11E8-B48F-1D18A9856A87
  last_name: Reininghaus
- first_name: Hubert
  full_name: Wagner, Hubert
  last_name: Wagner
citation:
  ama: 'Bauer U, Kerber M, Reininghaus J, Wagner H. PHAT – Persistent Homology Algorithms
    Toolbox. In: <i>ICMS 2014: International Congress on Mathematical Software</i>.
    Vol 8592. LNCS. Berlin, Heidelberg: Springer Berlin Heidelberg; 2014:137-143.
    doi:<a href="https://doi.org/10.1007/978-3-662-44199-2_24">10.1007/978-3-662-44199-2_24</a>'
  apa: 'Bauer, U., Kerber, M., Reininghaus, J., &#38; Wagner, H. (2014). PHAT – Persistent
    Homology Algorithms Toolbox. In <i>ICMS 2014: International Congress on Mathematical
    Software</i> (Vol. 8592, pp. 137–143). Berlin, Heidelberg: Springer Berlin Heidelberg.
    <a href="https://doi.org/10.1007/978-3-662-44199-2_24">https://doi.org/10.1007/978-3-662-44199-2_24</a>'
  chicago: 'Bauer, Ulrich, Michael Kerber, Jan Reininghaus, and Hubert Wagner. “PHAT
    – Persistent Homology Algorithms Toolbox.” In <i>ICMS 2014: International Congress
    on Mathematical Software</i>, 8592:137–43. LNCS. Berlin, Heidelberg: Springer
    Berlin Heidelberg, 2014. <a href="https://doi.org/10.1007/978-3-662-44199-2_24">https://doi.org/10.1007/978-3-662-44199-2_24</a>.'
  ieee: 'U. Bauer, M. Kerber, J. Reininghaus, and H. Wagner, “PHAT – Persistent Homology
    Algorithms Toolbox,” in <i>ICMS 2014: International Congress on Mathematical Software</i>,
    Seoul, South Korea, 2014, vol. 8592, pp. 137–143.'
  ista: 'Bauer U, Kerber M, Reininghaus J, Wagner H. 2014. PHAT – Persistent Homology
    Algorithms Toolbox. ICMS 2014: International Congress on Mathematical Software.
    ICMS: International Congress on Mathematical SoftwareLNCS vol. 8592, 137–143.'
  mla: 'Bauer, Ulrich, et al. “PHAT – Persistent Homology Algorithms Toolbox.” <i>ICMS
    2014: International Congress on Mathematical Software</i>, vol. 8592, Springer
    Berlin Heidelberg, 2014, pp. 137–43, doi:<a href="https://doi.org/10.1007/978-3-662-44199-2_24">10.1007/978-3-662-44199-2_24</a>.'
  short: 'U. Bauer, M. Kerber, J. Reininghaus, H. Wagner, in:, ICMS 2014: International
    Congress on Mathematical Software, Springer Berlin Heidelberg, Berlin, Heidelberg,
    2014, pp. 137–143.'
conference:
  end_date: 2014-08-09
  location: Seoul, South Korea
  name: 'ICMS: International Congress on Mathematical Software'
  start_date: 2014-08-05
date_created: 2022-03-21T07:12:16Z
date_published: 2014-09-01T00:00:00Z
date_updated: 2023-09-20T09:42:40Z
day: '01'
department:
- _id: HeEd
doi: 10.1007/978-3-662-44199-2_24
intvolume: '      8592'
language:
- iso: eng
month: '09'
oa_version: None
page: 137-143
place: Berlin, Heidelberg
publication: 'ICMS 2014: International Congress on Mathematical Software'
publication_identifier:
  eisbn:
  - '9783662441992'
  eissn:
  - 1611-3349
  isbn:
  - '9783662441985'
  issn:
  - 0302-9743
publication_status: published
publisher: Springer Berlin Heidelberg
quality_controlled: '1'
related_material:
  record:
  - id: '1433'
    relation: later_version
    status: public
scopus_import: '1'
series_title: LNCS
status: public
title: PHAT – Persistent Homology Algorithms Toolbox
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 8592
year: '2014'
...
---
_id: '2153'
abstract:
- lang: eng
  text: 'We define a simple, explicit map sending a morphism f : M → N of pointwise
    finite dimensional persistence modules to a matching between the barcodes of M
    and N. Our main result is that, in a precise sense, the quality of this matching
    is tightly controlled by the lengths of the longest intervals in the barcodes
    of ker f and coker f . As an immediate corollary, we obtain a new proof of the
    algebraic stability theorem for persistence barcodes [5, 9], a fundamental result
    in the theory of persistent homology. In contrast to previous proofs, ours shows
    explicitly how a δ-interleaving morphism between two persistence modules induces
    a δ-matching between the barcodes of the two modules. Our main result also specializes
    to a structure theorem for submodules and quotients of persistence modules. Copyright
    is held by the owner/author(s).'
author:
- first_name: Ulrich
  full_name: Bauer, Ulrich
  id: 2ADD483A-F248-11E8-B48F-1D18A9856A87
  last_name: Bauer
  orcid: 0000-0002-9683-0724
- first_name: Michael
  full_name: Lesnick, Michael
  last_name: Lesnick
citation:
  ama: 'Bauer U, Lesnick M. Induced matchings of barcodes and the algebraic stability
    of persistence. In: <i>Proceedings of the Annual Symposium on Computational Geometry</i>.
    ACM; 2014:355-364. doi:<a href="https://doi.org/10.1145/2582112.2582168">10.1145/2582112.2582168</a>'
  apa: 'Bauer, U., &#38; Lesnick, M. (2014). Induced matchings of barcodes and the
    algebraic stability of persistence. In <i>Proceedings of the Annual Symposium
    on Computational Geometry</i> (pp. 355–364). Kyoto, Japan: ACM. <a href="https://doi.org/10.1145/2582112.2582168">https://doi.org/10.1145/2582112.2582168</a>'
  chicago: Bauer, Ulrich, and Michael Lesnick. “Induced Matchings of Barcodes and
    the Algebraic Stability of Persistence.” In <i>Proceedings of the Annual Symposium
    on Computational Geometry</i>, 355–64. ACM, 2014. <a href="https://doi.org/10.1145/2582112.2582168">https://doi.org/10.1145/2582112.2582168</a>.
  ieee: U. Bauer and M. Lesnick, “Induced matchings of barcodes and the algebraic
    stability of persistence,” in <i>Proceedings of the Annual Symposium on Computational
    Geometry</i>, Kyoto, Japan, 2014, pp. 355–364.
  ista: 'Bauer U, Lesnick M. 2014. Induced matchings of barcodes and the algebraic
    stability of persistence. Proceedings of the Annual Symposium on Computational
    Geometry. SoCG: Symposium on Computational Geometry, 355–364.'
  mla: Bauer, Ulrich, and Michael Lesnick. “Induced Matchings of Barcodes and the
    Algebraic Stability of Persistence.” <i>Proceedings of the Annual Symposium on
    Computational Geometry</i>, ACM, 2014, pp. 355–64, doi:<a href="https://doi.org/10.1145/2582112.2582168">10.1145/2582112.2582168</a>.
  short: U. Bauer, M. Lesnick, in:, Proceedings of the Annual Symposium on Computational
    Geometry, ACM, 2014, pp. 355–364.
conference:
  end_date: 2014-06-11
  location: Kyoto, Japan
  name: 'SoCG: Symposium on Computational Geometry'
  start_date: 2014-06-08
date_created: 2018-12-11T11:56:01Z
date_published: 2014-06-01T00:00:00Z
date_updated: 2021-01-12T06:55:38Z
day: '01'
department:
- _id: HeEd
doi: 10.1145/2582112.2582168
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://arxiv.org/abs/1311.3681
month: '06'
oa: 1
oa_version: Submitted Version
page: 355 - 364
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: Proceedings of the Annual Symposium on Computational Geometry
publication_status: published
publisher: ACM
publist_id: '4853'
quality_controlled: '1'
scopus_import: 1
status: public
title: Induced matchings of barcodes and the algebraic stability of persistence
type: conference
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '2155'
abstract:
- lang: eng
  text: Given a finite set of points in Rn and a positive radius, we study the Čech,
    Delaunay-Čech, alpha, and wrap complexes as instances of a generalized discrete
    Morse theory. We prove that the latter three complexes are simple-homotopy equivalent.
    Our results have applications in topological data analysis and in the reconstruction
    of shapes from sampled data. Copyright is held by the owner/author(s).
acknowledgement: This research is partially supported by ESF under the ACAT Research
  Network Programme, and by the Russian Government under mega project 11.G34.31.0053
author:
- first_name: Ulrich
  full_name: Bauer, Ulrich
  id: 2ADD483A-F248-11E8-B48F-1D18A9856A87
  last_name: Bauer
  orcid: 0000-0002-9683-0724
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
citation:
  ama: 'Bauer U, Edelsbrunner H. The morse theory of Čech and Delaunay filtrations.
    In: <i>Proceedings of the Annual Symposium on Computational Geometry</i>. ACM;
    2014:484-490. doi:<a href="https://doi.org/10.1145/2582112.2582167">10.1145/2582112.2582167</a>'
  apa: 'Bauer, U., &#38; Edelsbrunner, H. (2014). The morse theory of Čech and Delaunay
    filtrations. In <i>Proceedings of the Annual Symposium on Computational Geometry</i>
    (pp. 484–490). Kyoto, Japan: ACM. <a href="https://doi.org/10.1145/2582112.2582167">https://doi.org/10.1145/2582112.2582167</a>'
  chicago: Bauer, Ulrich, and Herbert Edelsbrunner. “The Morse Theory of Čech and
    Delaunay Filtrations.” In <i>Proceedings of the Annual Symposium on Computational
    Geometry</i>, 484–90. ACM, 2014. <a href="https://doi.org/10.1145/2582112.2582167">https://doi.org/10.1145/2582112.2582167</a>.
  ieee: U. Bauer and H. Edelsbrunner, “The morse theory of Čech and Delaunay filtrations,”
    in <i>Proceedings of the Annual Symposium on Computational Geometry</i>, Kyoto,
    Japan, 2014, pp. 484–490.
  ista: 'Bauer U, Edelsbrunner H. 2014. The morse theory of Čech and Delaunay filtrations.
    Proceedings of the Annual Symposium on Computational Geometry. SoCG: Symposium
    on Computational Geometry, 484–490.'
  mla: Bauer, Ulrich, and Herbert Edelsbrunner. “The Morse Theory of Čech and Delaunay
    Filtrations.” <i>Proceedings of the Annual Symposium on Computational Geometry</i>,
    ACM, 2014, pp. 484–90, doi:<a href="https://doi.org/10.1145/2582112.2582167">10.1145/2582112.2582167</a>.
  short: U. Bauer, H. Edelsbrunner, in:, Proceedings of the Annual Symposium on Computational
    Geometry, ACM, 2014, pp. 484–490.
conference:
  end_date: 2014-06-11
  location: Kyoto, Japan
  name: 'SoCG: Symposium on Computational Geometry'
  start_date: 2014-06-08
date_created: 2018-12-11T11:56:01Z
date_published: 2014-06-01T00:00:00Z
date_updated: 2021-01-12T06:55:38Z
day: '01'
department:
- _id: HeEd
doi: 10.1145/2582112.2582167
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://arxiv.org/abs/1312.1231
month: '06'
oa: 1
oa_version: Submitted Version
page: 484 - 490
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: Proceedings of the Annual Symposium on Computational Geometry
publication_status: published
publisher: ACM
publist_id: '4851'
quality_controlled: '1'
scopus_import: 1
status: public
title: The morse theory of Čech and Delaunay filtrations
type: conference
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '2156'
abstract:
- lang: eng
  text: We propose a metric for Reeb graphs, called the functional distortion distance.
    Under this distance, the Reeb graph is stable against small changes of input functions.
    At the same time, it remains discriminative at differentiating input functions.
    In particular, the main result is that the functional distortion distance between
    two Reeb graphs is bounded from below by the bottleneck distance between both
    the ordinary and extended persistence diagrams for appropriate dimensions. As
    an application of our results, we analyze a natural simplification scheme for
    Reeb graphs, and show that persistent features in Reeb graph remains persistent
    under simplification. Understanding the stability of important features of the
    Reeb graph under simplification is an interesting problem on its own right, and
    critical to the practical usage of Reeb graphs. Copyright is held by the owner/author(s).
acknowledgement: National Science Foundation under grants CCF-1319406, CCF-1116258.
author:
- first_name: Ulrich
  full_name: Bauer, Ulrich
  id: 2ADD483A-F248-11E8-B48F-1D18A9856A87
  last_name: Bauer
  orcid: 0000-0002-9683-0724
- first_name: Xiaoyin
  full_name: Ge, Xiaoyin
  last_name: Ge
- first_name: Yusu
  full_name: Wang, Yusu
  last_name: Wang
citation:
  ama: 'Bauer U, Ge X, Wang Y. Measuring distance between Reeb graphs. In: <i>Proceedings
    of the Annual Symposium on Computational Geometry</i>. ACM; 2014:464-473. doi:<a
    href="https://doi.org/10.1145/2582112.2582169">10.1145/2582112.2582169</a>'
  apa: 'Bauer, U., Ge, X., &#38; Wang, Y. (2014). Measuring distance between Reeb
    graphs. In <i>Proceedings of the Annual Symposium on Computational Geometry</i>
    (pp. 464–473). Kyoto, Japan: ACM. <a href="https://doi.org/10.1145/2582112.2582169">https://doi.org/10.1145/2582112.2582169</a>'
  chicago: Bauer, Ulrich, Xiaoyin Ge, and Yusu Wang. “Measuring Distance between Reeb
    Graphs.” In <i>Proceedings of the Annual Symposium on Computational Geometry</i>,
    464–73. ACM, 2014. <a href="https://doi.org/10.1145/2582112.2582169">https://doi.org/10.1145/2582112.2582169</a>.
  ieee: U. Bauer, X. Ge, and Y. Wang, “Measuring distance between Reeb graphs,” in
    <i>Proceedings of the Annual Symposium on Computational Geometry</i>, Kyoto, Japan,
    2014, pp. 464–473.
  ista: 'Bauer U, Ge X, Wang Y. 2014. Measuring distance between Reeb graphs. Proceedings
    of the Annual Symposium on Computational Geometry. SoCG: Symposium on Computational
    Geometry, 464–473.'
  mla: Bauer, Ulrich, et al. “Measuring Distance between Reeb Graphs.” <i>Proceedings
    of the Annual Symposium on Computational Geometry</i>, ACM, 2014, pp. 464–73,
    doi:<a href="https://doi.org/10.1145/2582112.2582169">10.1145/2582112.2582169</a>.
  short: U. Bauer, X. Ge, Y. Wang, in:, Proceedings of the Annual Symposium on Computational
    Geometry, ACM, 2014, pp. 464–473.
conference:
  end_date: 2014-06-11
  location: Kyoto, Japan
  name: 'SoCG: Symposium on Computational Geometry'
  start_date: 2014-06-08
date_created: 2018-12-11T11:56:02Z
date_published: 2014-06-01T00:00:00Z
date_updated: 2021-01-12T06:55:39Z
day: '01'
department:
- _id: HeEd
doi: 10.1145/2582112.2582169
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://arxiv.org/abs/1307.2839
month: '06'
oa: 1
oa_version: Submitted Version
page: 464 - 473
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: Proceedings of the Annual Symposium on Computational Geometry
publication_status: published
publisher: ACM
publist_id: '4850'
quality_controlled: '1'
scopus_import: 1
status: public
title: Measuring distance between Reeb graphs
type: conference
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '2177'
abstract:
- lang: eng
  text: We give evidence for the difficulty of computing Betti numbers of simplicial
    complexes over a finite field. We do this by reducing the rank computation for
    sparse matrices with to non-zero entries to computing Betti numbers of simplicial
    complexes consisting of at most a constant times to simplices. Together with the
    known reduction in the other direction, this implies that the two problems have
    the same computational complexity.
author:
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
- first_name: Salman
  full_name: Parsa, Salman
  id: 4BDBD4F2-F248-11E8-B48F-1D18A9856A87
  last_name: Parsa
citation:
  ama: 'Edelsbrunner H, Parsa S. On the computational complexity of betti numbers
    reductions from matrix rank. In: <i>Proceedings of the Annual ACM-SIAM Symposium
    on Discrete Algorithms</i>. SIAM; 2014:152-160. doi:<a href="https://doi.org/10.1137/1.9781611973402.11">10.1137/1.9781611973402.11</a>'
  apa: 'Edelsbrunner, H., &#38; Parsa, S. (2014). On the computational complexity
    of betti numbers reductions from matrix rank. In <i>Proceedings of the Annual
    ACM-SIAM Symposium on Discrete Algorithms</i> (pp. 152–160). Portland, USA: SIAM.
    <a href="https://doi.org/10.1137/1.9781611973402.11">https://doi.org/10.1137/1.9781611973402.11</a>'
  chicago: Edelsbrunner, Herbert, and Salman Parsa. “On the Computational Complexity
    of Betti Numbers Reductions from Matrix Rank.” In <i>Proceedings of the Annual
    ACM-SIAM Symposium on Discrete Algorithms</i>, 152–60. SIAM, 2014. <a href="https://doi.org/10.1137/1.9781611973402.11">https://doi.org/10.1137/1.9781611973402.11</a>.
  ieee: H. Edelsbrunner and S. Parsa, “On the computational complexity of betti numbers
    reductions from matrix rank,” in <i>Proceedings of the Annual ACM-SIAM Symposium
    on Discrete Algorithms</i>, Portland, USA, 2014, pp. 152–160.
  ista: 'Edelsbrunner H, Parsa S. 2014. On the computational complexity of betti numbers
    reductions from matrix rank. Proceedings of the Annual ACM-SIAM Symposium on Discrete
    Algorithms. SODA: Symposium on Discrete Algorithms, 152–160.'
  mla: Edelsbrunner, Herbert, and Salman Parsa. “On the Computational Complexity of
    Betti Numbers Reductions from Matrix Rank.” <i>Proceedings of the Annual ACM-SIAM
    Symposium on Discrete Algorithms</i>, SIAM, 2014, pp. 152–60, doi:<a href="https://doi.org/10.1137/1.9781611973402.11">10.1137/1.9781611973402.11</a>.
  short: H. Edelsbrunner, S. Parsa, in:, Proceedings of the Annual ACM-SIAM Symposium
    on Discrete Algorithms, SIAM, 2014, pp. 152–160.
conference:
  end_date: 2014-01-07
  location: Portland, USA
  name: 'SODA: Symposium on Discrete Algorithms'
  start_date: 2014-01-05
date_created: 2018-12-11T11:56:09Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2021-01-12T06:55:48Z
day: '01'
department:
- _id: HeEd
doi: 10.1137/1.9781611973402.11
language:
- iso: eng
month: '01'
oa_version: None
page: 152 - 160
publication: Proceedings of the Annual ACM-SIAM Symposium on Discrete Algorithms
publication_status: published
publisher: SIAM
publist_id: '4805'
quality_controlled: '1'
scopus_import: 1
status: public
title: On the computational complexity of betti numbers reductions from matrix rank
type: conference
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '2184'
abstract:
- lang: eng
  text: 'Given topological spaces X,Y, a fundamental problem of algebraic topology
    is understanding the structure of all continuous maps X→ Y. We consider a computational
    version, where X,Y are given as finite simplicial complexes, and the goal is to
    compute [X,Y], that is, all homotopy classes of suchmaps.We solve this problem
    in the stable range, where for some d ≥ 2, we have dim X ≤ 2d-2 and Y is (d-1)-connected;
    in particular, Y can be the d-dimensional sphere Sd. The algorithm combines classical
    tools and ideas from homotopy theory (obstruction theory, Postnikov systems, and
    simplicial sets) with algorithmic tools from effective algebraic topology (locally
    effective simplicial sets and objects with effective homology). In contrast, [X,Y]
    is known to be uncomputable for general X,Y, since for X = S1 it includes a well
    known undecidable problem: testing triviality of the fundamental group of Y. In
    follow-up papers, the algorithm is shown to run in polynomial time for d fixed,
    and extended to other problems, such as the extension problem, where we are given
    a subspace A ⊂ X and a map A→ Y and ask whether it extends to a map X → Y, or
    computing the Z2-index-everything in the stable range. Outside the stable range,
    the extension problem is undecidable.'
acknowledgement: The research by M. K. was supported by project GAUK 49209. The research
  by M. K. was also supported by project 1M0545 by the Ministry of Education of the
  Czech Republic and by Center of Excellence { Inst. for Theor. Comput. Sci., Prague
  (project P202/12/G061 of GACR). The research by U. W. was supported by the Swiss
  National Science Foundation (SNF Projects 200021-125309, 200020-138230, and PP00P2-138948).
article_number: '17 '
author:
- first_name: Martin
  full_name: Čadek, Martin
  last_name: Čadek
- first_name: Marek
  full_name: Krcál, Marek
  id: 33E21118-F248-11E8-B48F-1D18A9856A87
  last_name: Krcál
- first_name: Jiří
  full_name: Matoušek, Jiří
  last_name: Matoušek
- first_name: Francis
  full_name: Sergeraert, Francis
  last_name: Sergeraert
- first_name: Lukáš
  full_name: Vokřínek, Lukáš
  last_name: Vokřínek
- first_name: Uli
  full_name: Wagner, Uli
  id: 36690CA2-F248-11E8-B48F-1D18A9856A87
  last_name: Wagner
  orcid: 0000-0002-1494-0568
citation:
  ama: Čadek M, Krcál M, Matoušek J, Sergeraert F, Vokřínek L, Wagner U. Computing
    all maps into a sphere. <i>Journal of the ACM</i>. 2014;61(3). doi:<a href="https://doi.org/10.1145/2597629">10.1145/2597629</a>
  apa: Čadek, M., Krcál, M., Matoušek, J., Sergeraert, F., Vokřínek, L., &#38; Wagner,
    U. (2014). Computing all maps into a sphere. <i>Journal of the ACM</i>. ACM. <a
    href="https://doi.org/10.1145/2597629">https://doi.org/10.1145/2597629</a>
  chicago: Čadek, Martin, Marek Krcál, Jiří Matoušek, Francis Sergeraert, Lukáš Vokřínek,
    and Uli Wagner. “Computing All Maps into a Sphere.” <i>Journal of the ACM</i>.
    ACM, 2014. <a href="https://doi.org/10.1145/2597629">https://doi.org/10.1145/2597629</a>.
  ieee: M. Čadek, M. Krcál, J. Matoušek, F. Sergeraert, L. Vokřínek, and U. Wagner,
    “Computing all maps into a sphere,” <i>Journal of the ACM</i>, vol. 61, no. 3.
    ACM, 2014.
  ista: Čadek M, Krcál M, Matoušek J, Sergeraert F, Vokřínek L, Wagner U. 2014. Computing
    all maps into a sphere. Journal of the ACM. 61(3), 17.
  mla: Čadek, Martin, et al. “Computing All Maps into a Sphere.” <i>Journal of the
    ACM</i>, vol. 61, no. 3, 17, ACM, 2014, doi:<a href="https://doi.org/10.1145/2597629">10.1145/2597629</a>.
  short: M. Čadek, M. Krcál, J. Matoušek, F. Sergeraert, L. Vokřínek, U. Wagner, Journal
    of the ACM 61 (2014).
date_created: 2018-12-11T11:56:12Z
date_published: 2014-05-01T00:00:00Z
date_updated: 2021-01-12T06:55:50Z
day: '01'
department:
- _id: UlWa
- _id: HeEd
doi: 10.1145/2597629
intvolume: '        61'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://arxiv.org/abs/1105.6257
month: '05'
oa: 1
oa_version: Preprint
publication: Journal of the ACM
publication_status: published
publisher: ACM
publist_id: '4797'
quality_controlled: '1'
scopus_import: 1
status: public
title: Computing all maps into a sphere
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 61
year: '2014'
...
---
_id: '2255'
abstract:
- lang: eng
  text: Motivated by applications in biology, we present an algorithm for estimating
    the length of tube-like shapes in 3-dimensional Euclidean space. In a first step,
    we combine the tube formula of Weyl with integral geometric methods to obtain
    an integral representation of the length, which we approximate using a variant
    of the Koksma-Hlawka Theorem. In a second step, we use tools from computational
    topology to decrease the dependence on small perturbations of the shape. We present
    computational experiments that shed light on the stability and the convergence
    rate of our algorithm.
author:
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
- first_name: Florian
  full_name: Pausinger, Florian
  id: 2A77D7A2-F248-11E8-B48F-1D18A9856A87
  last_name: Pausinger
  orcid: 0000-0002-8379-3768
citation:
  ama: Edelsbrunner H, Pausinger F. Stable length estimates of tube-like shapes. <i>Journal
    of Mathematical Imaging and Vision</i>. 2014;50(1):164-177. doi:<a href="https://doi.org/10.1007/s10851-013-0468-x">10.1007/s10851-013-0468-x</a>
  apa: Edelsbrunner, H., &#38; Pausinger, F. (2014). Stable length estimates of tube-like
    shapes. <i>Journal of Mathematical Imaging and Vision</i>. Springer. <a href="https://doi.org/10.1007/s10851-013-0468-x">https://doi.org/10.1007/s10851-013-0468-x</a>
  chicago: Edelsbrunner, Herbert, and Florian Pausinger. “Stable Length Estimates
    of Tube-like Shapes.” <i>Journal of Mathematical Imaging and Vision</i>. Springer,
    2014. <a href="https://doi.org/10.1007/s10851-013-0468-x">https://doi.org/10.1007/s10851-013-0468-x</a>.
  ieee: H. Edelsbrunner and F. Pausinger, “Stable length estimates of tube-like shapes,”
    <i>Journal of Mathematical Imaging and Vision</i>, vol. 50, no. 1. Springer, pp.
    164–177, 2014.
  ista: Edelsbrunner H, Pausinger F. 2014. Stable length estimates of tube-like shapes.
    Journal of Mathematical Imaging and Vision. 50(1), 164–177.
  mla: Edelsbrunner, Herbert, and Florian Pausinger. “Stable Length Estimates of Tube-like
    Shapes.” <i>Journal of Mathematical Imaging and Vision</i>, vol. 50, no. 1, Springer,
    2014, pp. 164–77, doi:<a href="https://doi.org/10.1007/s10851-013-0468-x">10.1007/s10851-013-0468-x</a>.
  short: H. Edelsbrunner, F. Pausinger, Journal of Mathematical Imaging and Vision
    50 (2014) 164–177.
date_created: 2018-12-11T11:56:36Z
date_published: 2014-09-01T00:00:00Z
date_updated: 2023-09-07T11:41:25Z
day: '01'
ddc:
- '000'
department:
- _id: HeEd
doi: 10.1007/s10851-013-0468-x
ec_funded: 1
file:
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file_date_updated: 2020-07-14T12:45:35Z
has_accepted_license: '1'
intvolume: '        50'
issue: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Submitted Version
page: 164 - 177
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: Journal of Mathematical Imaging and Vision
publication_identifier:
  issn:
  - '09249907'
publication_status: published
publisher: Springer
publist_id: '4691'
pubrep_id: '549'
quality_controlled: '1'
related_material:
  record:
  - id: '2843'
    relation: earlier_version
    status: public
  - id: '1399'
    relation: dissertation_contains
    status: public
scopus_import: 1
status: public
title: Stable length estimates of tube-like shapes
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 50
year: '2014'
...
---
_id: '2905'
abstract:
- lang: eng
  text: "Persistent homology is a recent grandchild of homology that has found use
    in\r\nscience and engineering as well as in mathematics. This paper surveys the
    method as well\r\nas the applications, neglecting completeness in favor of highlighting
    ideas and directions."
acknowledgement: This research is partially supported by NSF under grant DBI-0820624,
  by ESF under the Research Networking Programme, and by the Russian Government Project
  11.G34.31.0053.
article_processing_charge: No
author:
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
- first_name: Dmitriy
  full_name: Morozovy, Dmitriy
  last_name: Morozovy
citation:
  ama: 'Edelsbrunner H, Morozovy D. Persistent homology: Theory and practice. In:
    European Mathematical Society Publishing House; 2014:31-50. doi:<a href="https://doi.org/10.4171/120-1/3">10.4171/120-1/3</a>'
  apa: 'Edelsbrunner, H., &#38; Morozovy, D. (2014). Persistent homology: Theory and
    practice (pp. 31–50). Presented at the ECM: European Congress of Mathematics,
    Kraków, Poland: European Mathematical Society Publishing House. <a href="https://doi.org/10.4171/120-1/3">https://doi.org/10.4171/120-1/3</a>'
  chicago: 'Edelsbrunner, Herbert, and Dmitriy Morozovy. “Persistent Homology: Theory
    and Practice,” 31–50. European Mathematical Society Publishing House, 2014. <a
    href="https://doi.org/10.4171/120-1/3">https://doi.org/10.4171/120-1/3</a>.'
  ieee: 'H. Edelsbrunner and D. Morozovy, “Persistent homology: Theory and practice,”
    presented at the ECM: European Congress of Mathematics, Kraków, Poland, 2014,
    pp. 31–50.'
  ista: 'Edelsbrunner H, Morozovy D. 2014. Persistent homology: Theory and practice.
    ECM: European Congress of Mathematics, 31–50.'
  mla: 'Edelsbrunner, Herbert, and Dmitriy Morozovy. <i>Persistent Homology: Theory
    and Practice</i>. European Mathematical Society Publishing House, 2014, pp. 31–50,
    doi:<a href="https://doi.org/10.4171/120-1/3">10.4171/120-1/3</a>.'
  short: H. Edelsbrunner, D. Morozovy, in:, European Mathematical Society Publishing
    House, 2014, pp. 31–50.
conference:
  end_date: 2012-07-07
  location: Kraków, Poland
  name: 'ECM: European Congress of Mathematics'
  start_date: 2012-07-02
date_created: 2018-12-11T12:00:16Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2021-01-12T07:00:36Z
day: '01'
ddc:
- '000'
department:
- _id: HeEd
doi: 10.4171/120-1/3
file:
- access_level: open_access
  checksum: 1d4a046f1af945c407c5c4d411d4c5e4
  content_type: application/pdf
  creator: system
  date_created: 2018-12-12T10:16:43Z
  date_updated: 2020-07-14T12:45:52Z
  file_id: '5232'
  file_name: IST-2016-544-v1+1_2012-P-11-PHTheoryPractice.pdf
  file_size: 435320
  relation: main_file
file_date_updated: 2020-07-14T12:45:52Z
has_accepted_license: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 31 - 50
publication_status: published
publisher: European Mathematical Society Publishing House
publist_id: '3842'
pubrep_id: '544'
quality_controlled: '1'
status: public
title: 'Persistent homology: Theory and practice'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '10897'
abstract:
- lang: eng
  text: Taking images is an efficient way to collect data about the physical world.
    It can be done fast and in exquisite detail. By definition, image processing is
    the field that concerns itself with the computation aimed at harnessing the information
    contained in images [10]. This talk is concerned with topological information.
    Our main thesis is that persistent homology [5] is a useful method to quantify
    and summarize topological information, building a bridge that connects algebraic
    topology with applications. We provide supporting evidence for this thesis by
    touching upon four technical developments in the overlap between persistent homology
    and image processing.
acknowledgement: This research is partially supported by the European Science Foundation
  (ESF) under the Research Network Programme, the European Union under the Toposys
  Project FP7-ICT-318493-STREP, the Russian Government under the Mega Project 11.G34.31.0053.
article_processing_charge: No
author:
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
citation:
  ama: 'Edelsbrunner H. Persistent homology in image processing. In: <i>Graph-Based
    Representations in Pattern Recognition</i>. Vol 7877. LNCS. Berlin, Heidelberg:
    Springer Nature; 2013:182-183. doi:<a href="https://doi.org/10.1007/978-3-642-38221-5_19">10.1007/978-3-642-38221-5_19</a>'
  apa: 'Edelsbrunner, H. (2013). Persistent homology in image processing. In <i>Graph-Based
    Representations in Pattern Recognition</i> (Vol. 7877, pp. 182–183). Berlin, Heidelberg:
    Springer Nature. <a href="https://doi.org/10.1007/978-3-642-38221-5_19">https://doi.org/10.1007/978-3-642-38221-5_19</a>'
  chicago: 'Edelsbrunner, Herbert. “Persistent Homology in Image Processing.” In <i>Graph-Based
    Representations in Pattern Recognition</i>, 7877:182–83. LNCS. Berlin, Heidelberg:
    Springer Nature, 2013. <a href="https://doi.org/10.1007/978-3-642-38221-5_19">https://doi.org/10.1007/978-3-642-38221-5_19</a>.'
  ieee: H. Edelsbrunner, “Persistent homology in image processing,” in <i>Graph-Based
    Representations in Pattern Recognition</i>, Vienna, Austria, 2013, vol. 7877,
    pp. 182–183.
  ista: 'Edelsbrunner H. 2013. Persistent homology in image processing. Graph-Based
    Representations in Pattern Recognition. GbRPR: Graph-based Representations in
    Pattern RecognitionLNCS vol. 7877, 182–183.'
  mla: Edelsbrunner, Herbert. “Persistent Homology in Image Processing.” <i>Graph-Based
    Representations in Pattern Recognition</i>, vol. 7877, Springer Nature, 2013,
    pp. 182–83, doi:<a href="https://doi.org/10.1007/978-3-642-38221-5_19">10.1007/978-3-642-38221-5_19</a>.
  short: H. Edelsbrunner, in:, Graph-Based Representations in Pattern Recognition,
    Springer Nature, Berlin, Heidelberg, 2013, pp. 182–183.
conference:
  end_date: 2013-05-17
  location: Vienna, Austria
  name: 'GbRPR: Graph-based Representations in Pattern Recognition'
  start_date: 2013-05-15
date_created: 2022-03-21T07:30:33Z
date_published: 2013-06-01T00:00:00Z
date_updated: 2023-09-05T15:10:20Z
day: '01'
department:
- _id: HeEd
doi: 10.1007/978-3-642-38221-5_19
ec_funded: 1
intvolume: '      7877'
language:
- iso: eng
month: '06'
oa_version: None
page: 182-183
place: Berlin, Heidelberg
project:
- _id: 255D761E-B435-11E9-9278-68D0E5697425
  call_identifier: FP7
  grant_number: '318493'
  name: Topological Complex Systems
publication: Graph-Based Representations in Pattern Recognition
publication_identifier:
  eisbn:
  - '9783642382215'
  eissn:
  - 1611-3349
  isbn:
  - '9783642382208'
  issn:
  - 0302-9743
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
series_title: LNCS
status: public
title: Persistent homology in image processing
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 7877
year: '2013'
...
---
_id: '2209'
abstract:
- lang: eng
  text: "A straight skeleton is a well-known geometric structure, and several algorithms
    exist to construct the straight skeleton for a given polygon or planar straight-line
    graph. In this paper, we ask the reverse question: Given the straight skeleton
    (in form of a planar straight-line graph, with some rays to infinity), can we
    reconstruct a planar straight-line graph for which this was the straight skeleton?
    We show how to reduce this problem to the problem of finding a line that intersects
    a set of convex polygons. We can find these convex polygons and all such lines
    in $O(nlog n)$ time in the Real RAM computer model, where $n$ denotes the number
    of edges of the input graph. We also explain how our approach can be used for
    recognizing Voronoi diagrams of points, thereby completing a partial solution
    provided by Ash and Bolker in 1985.\r\n"
alternative_title:
- '2013 10th International Symposium on Voronoi Diagrams in Science and Engineering
  (ISVD 2013) '
author:
- first_name: Therese
  full_name: Biedl, Therese
  last_name: Biedl
- first_name: Martin
  full_name: Held, Martin
  last_name: Held
- first_name: Stefan
  full_name: Huber, Stefan
  id: 4700A070-F248-11E8-B48F-1D18A9856A87
  last_name: Huber
  orcid: 0000-0002-8871-5814
citation:
  ama: 'Biedl T, Held M, Huber S. Recognizing straight skeletons and Voronoi diagrams
    and reconstructing their input. In: IEEE; 2013:37-46. doi:<a href="https://doi.org/10.1109/ISVD.2013.11">10.1109/ISVD.2013.11</a>'
  apa: 'Biedl, T., Held, M., &#38; Huber, S. (2013). Recognizing straight skeletons
    and Voronoi diagrams and reconstructing their input (pp. 37–46). Presented at
    the ISVD: Voronoi Diagrams in Science and Engineering, St. Petersburg, Russia:
    IEEE. <a href="https://doi.org/10.1109/ISVD.2013.11">https://doi.org/10.1109/ISVD.2013.11</a>'
  chicago: Biedl, Therese, Martin Held, and Stefan Huber. “Recognizing Straight Skeletons
    and Voronoi Diagrams and Reconstructing Their Input,” 37–46. IEEE, 2013. <a href="https://doi.org/10.1109/ISVD.2013.11">https://doi.org/10.1109/ISVD.2013.11</a>.
  ieee: 'T. Biedl, M. Held, and S. Huber, “Recognizing straight skeletons and Voronoi
    diagrams and reconstructing their input,” presented at the ISVD: Voronoi Diagrams
    in Science and Engineering, St. Petersburg, Russia, 2013, pp. 37–46.'
  ista: 'Biedl T, Held M, Huber S. 2013. Recognizing straight skeletons and Voronoi
    diagrams and reconstructing their input. ISVD: Voronoi Diagrams in Science and
    Engineering, 2013 10th International Symposium on Voronoi Diagrams in Science
    and Engineering (ISVD 2013) , , 37–46.'
  mla: Biedl, Therese, et al. <i>Recognizing Straight Skeletons and Voronoi Diagrams
    and Reconstructing Their Input</i>. IEEE, 2013, pp. 37–46, doi:<a href="https://doi.org/10.1109/ISVD.2013.11">10.1109/ISVD.2013.11</a>.
  short: T. Biedl, M. Held, S. Huber, in:, IEEE, 2013, pp. 37–46.
conference:
  end_date: 2013-07-10
  location: St. Petersburg, Russia
  name: 'ISVD: Voronoi Diagrams in Science and Engineering'
  start_date: 2013-07-08
date_created: 2018-12-11T11:56:20Z
date_published: 2013-12-01T00:00:00Z
date_updated: 2021-01-12T06:56:00Z
day: '01'
department:
- _id: HeEd
doi: 10.1109/ISVD.2013.11
language:
- iso: eng
month: '12'
oa_version: None
page: 37 - 46
publication_identifier:
  eisbn:
  - '978-0-7695-5037-4 '
publication_status: published
publisher: IEEE
publist_id: '4763'
quality_controlled: '1'
scopus_import: 1
status: public
title: Recognizing straight skeletons and Voronoi diagrams and reconstructing their
  input
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2013'
...
---
_id: '2210'
abstract:
- lang: eng
  text: 'A straight skeleton is a well-known geometric structure, and several algorithms
    exist to construct the straight skeleton for a given polygon. In this paper, we
    ask the reverse question: Given the straight skeleton (in form of a tree with
    a drawing in the plane, but with the exact position of the leaves unspecified),
    can we reconstruct the polygon? We show that in most cases there exists at most
    one polygon; in the remaining case there is an infinite number of polygons determined
    by one angle that can range in an interval. We can find this (set of) polygon(s)
    in linear time in the Real RAM computer model.'
author:
- first_name: Therese
  full_name: Biedl, Therese
  last_name: Biedl
- first_name: Martin
  full_name: Held, Martin
  last_name: Held
- first_name: Stefan
  full_name: Huber, Stefan
  id: 4700A070-F248-11E8-B48F-1D18A9856A87
  last_name: Huber
  orcid: 0000-0002-8871-5814
citation:
  ama: 'Biedl T, Held M, Huber S. Reconstructing polygons from embedded straight skeletons.
    In: <i>29th European Workshop on Computational Geometry</i>. TU Braunschweig;
    2013:95-98.'
  apa: 'Biedl, T., Held, M., &#38; Huber, S. (2013). Reconstructing polygons from
    embedded straight skeletons. In <i>29th European Workshop on Computational Geometry</i>
    (pp. 95–98). Braunschweig, Germany: TU Braunschweig.'
  chicago: Biedl, Therese, Martin Held, and Stefan Huber. “Reconstructing Polygons
    from Embedded Straight Skeletons.” In <i>29th European Workshop on Computational
    Geometry</i>, 95–98. TU Braunschweig, 2013.
  ieee: T. Biedl, M. Held, and S. Huber, “Reconstructing polygons from embedded straight
    skeletons,” in <i>29th European Workshop on Computational Geometry</i>, Braunschweig,
    Germany, 2013, pp. 95–98.
  ista: 'Biedl T, Held M, Huber S. 2013. Reconstructing polygons from embedded straight
    skeletons. 29th European Workshop on Computational Geometry. EuroCG: European
    Workshop on Computational Geometry, 95–98.'
  mla: Biedl, Therese, et al. “Reconstructing Polygons from Embedded Straight Skeletons.”
    <i>29th European Workshop on Computational Geometry</i>, TU Braunschweig, 2013,
    pp. 95–98.
  short: T. Biedl, M. Held, S. Huber, in:, 29th European Workshop on Computational
    Geometry, TU Braunschweig, 2013, pp. 95–98.
conference:
  end_date: 2013-03-20
  location: Braunschweig, Germany
  name: 'EuroCG: European Workshop on Computational Geometry'
  start_date: 2013-03-17
date_created: 2018-12-11T11:56:21Z
date_published: 2013-03-01T00:00:00Z
date_updated: 2021-01-12T06:56:00Z
day: '01'
department:
- _id: HeEd
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://www.ibr.cs.tu-bs.de/alg/eurocg13/booklet_eurocg13.pdf
month: '03'
oa: 1
oa_version: Submitted Version
page: 95 - 98
publication: 29th European Workshop on Computational Geometry
publication_status: published
publisher: TU Braunschweig
publist_id: '4762'
status: public
title: Reconstructing polygons from embedded straight skeletons
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2013'
...
---
_id: '2304'
abstract:
- lang: eng
  text: This extended abstract is concerned with the irregularities of distribution
    of one-dimensional permuted van der Corput sequences that are generated from linear
    permutations. We show how to obtain upper bounds for the discrepancy and diaphony
    of these sequences, by relating them to Kronecker sequences and applying earlier
    results of Faure and Niederreiter.
acknowledgement: This research is supported by the Graduate school of IST Austria
  (Institute of Science and Technology Austria).
author:
- first_name: Florian
  full_name: Pausinger, Florian
  id: 2A77D7A2-F248-11E8-B48F-1D18A9856A87
  last_name: Pausinger
  orcid: 0000-0002-8379-3768
citation:
  ama: Pausinger F. Van der Corput sequences and linear permutations. <i>Electronic
    Notes in Discrete Mathematics</i>. 2013;43:43-50. doi:<a href="https://doi.org/10.1016/j.endm.2013.07.008">10.1016/j.endm.2013.07.008</a>
  apa: Pausinger, F. (2013). Van der Corput sequences and linear permutations. <i>Electronic
    Notes in Discrete Mathematics</i>. Elsevier. <a href="https://doi.org/10.1016/j.endm.2013.07.008">https://doi.org/10.1016/j.endm.2013.07.008</a>
  chicago: Pausinger, Florian. “Van Der Corput Sequences and Linear Permutations.”
    <i>Electronic Notes in Discrete Mathematics</i>. Elsevier, 2013. <a href="https://doi.org/10.1016/j.endm.2013.07.008">https://doi.org/10.1016/j.endm.2013.07.008</a>.
  ieee: F. Pausinger, “Van der Corput sequences and linear permutations,” <i>Electronic
    Notes in Discrete Mathematics</i>, vol. 43. Elsevier, pp. 43–50, 2013.
  ista: Pausinger F. 2013. Van der Corput sequences and linear permutations. Electronic
    Notes in Discrete Mathematics. 43, 43–50.
  mla: Pausinger, Florian. “Van Der Corput Sequences and Linear Permutations.” <i>Electronic
    Notes in Discrete Mathematics</i>, vol. 43, Elsevier, 2013, pp. 43–50, doi:<a
    href="https://doi.org/10.1016/j.endm.2013.07.008">10.1016/j.endm.2013.07.008</a>.
  short: F. Pausinger, Electronic Notes in Discrete Mathematics 43 (2013) 43–50.
date_created: 2018-12-11T11:56:53Z
date_published: 2013-09-05T00:00:00Z
date_updated: 2021-01-12T06:56:39Z
day: '05'
department:
- _id: HeEd
doi: 10.1016/j.endm.2013.07.008
intvolume: '        43'
language:
- iso: eng
month: '09'
oa_version: None
page: 43 - 50
publication: Electronic Notes in Discrete Mathematics
publication_status: published
publisher: Elsevier
publist_id: '4623'
quality_controlled: '1'
scopus_import: 1
status: public
title: Van der Corput sequences and linear permutations
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 43
year: '2013'
...
---
_id: '2807'
abstract:
- lang: eng
  text: 'We consider several basic problems of algebraic topology, with connections
    to combinatorial and geometric questions, from the point of view of computational
    complexity. The extension problem asks, given topological spaces X; Y , a subspace
    A ⊆ X, and a (continuous) map f : A → Y , whether f can be extended to a map X
    → Y . For computational purposes, we assume that X and Y are represented as finite
    simplicial complexes, A is a subcomplex of X, and f is given as a simplicial map.
    In this generality the problem is undecidable, as follows from Novikov''s result
    from the 1950s on uncomputability of the fundamental group π1(Y ). We thus study
    the problem under the assumption that, for some k ≥ 2, Y is (k - 1)-connected;
    informally, this means that Y has \no holes up to dimension k-1&quot; (a basic
    example of such a Y is the sphere Sk). We prove that, on the one hand, this problem
    is still undecidable for dimX = 2k. On the other hand, for every fixed k ≥ 2,
    we obtain an algorithm that solves the extension problem in polynomial time assuming
    Y (k - 1)-connected and dimX ≤ 2k - 1. For dimX ≤ 2k - 2, the algorithm also provides
    a classification of all extensions up to homotopy (continuous deformation). This
    relies on results of our SODA 2012 paper, and the main new ingredient is a machinery
    of objects with polynomial-time homology, which is a polynomial-time analog of
    objects with effective homology developed earlier by Sergeraert et al. We also
    consider the computation of the higher homotopy groups πk(Y ), k ≥ 2, for a 1-connected
    Y . Their computability was established by Brown in 1957; we show that πk(Y )
    can be computed in polynomial time for every fixed k ≥ 2. On the other hand, Anick
    proved in 1989 that computing πk(Y ) is #P-hard if k is a part of input, where
    Y is a cell complex with certain rather compact encoding. We strengthen his result
    to #P-hardness for Y given as a simplicial complex. '
author:
- first_name: Martin
  full_name: Čadek, Martin
  last_name: Čadek
- first_name: Marek
  full_name: Krcál, Marek
  id: 33E21118-F248-11E8-B48F-1D18A9856A87
  last_name: Krcál
- first_name: Jiří
  full_name: Matoušek, Jiří
  last_name: Matoušek
- first_name: Lukáš
  full_name: Vokřínek, Lukáš
  last_name: Vokřínek
- first_name: Uli
  full_name: Wagner, Uli
  id: 36690CA2-F248-11E8-B48F-1D18A9856A87
  last_name: Wagner
  orcid: 0000-0002-1494-0568
citation:
  ama: 'Čadek M, Krcál M, Matoušek J, Vokřínek L, Wagner U. Extending continuous maps:
    Polynomiality and undecidability. In: <i>45th Annual ACM Symposium on Theory of
    Computing</i>. ACM; 2013:595-604. doi:<a href="https://doi.org/10.1145/2488608.2488683">10.1145/2488608.2488683</a>'
  apa: 'Čadek, M., Krcál, M., Matoušek, J., Vokřínek, L., &#38; Wagner, U. (2013).
    Extending continuous maps: Polynomiality and undecidability. In <i>45th Annual
    ACM Symposium on theory of computing</i> (pp. 595–604). Palo Alto, CA, United
    States: ACM. <a href="https://doi.org/10.1145/2488608.2488683">https://doi.org/10.1145/2488608.2488683</a>'
  chicago: 'Čadek, Martin, Marek Krcál, Jiří Matoušek, Lukáš Vokřínek, and Uli Wagner.
    “Extending Continuous Maps: Polynomiality and Undecidability.” In <i>45th Annual
    ACM Symposium on Theory of Computing</i>, 595–604. ACM, 2013. <a href="https://doi.org/10.1145/2488608.2488683">https://doi.org/10.1145/2488608.2488683</a>.'
  ieee: 'M. Čadek, M. Krcál, J. Matoušek, L. Vokřínek, and U. Wagner, “Extending continuous
    maps: Polynomiality and undecidability,” in <i>45th Annual ACM Symposium on theory
    of computing</i>, Palo Alto, CA, United States, 2013, pp. 595–604.'
  ista: 'Čadek M, Krcál M, Matoušek J, Vokřínek L, Wagner U. 2013. Extending continuous
    maps: Polynomiality and undecidability. 45th Annual ACM Symposium on theory of
    computing. STOC: Symposium on the Theory of Computing, 595–604.'
  mla: 'Čadek, Martin, et al. “Extending Continuous Maps: Polynomiality and Undecidability.”
    <i>45th Annual ACM Symposium on Theory of Computing</i>, ACM, 2013, pp. 595–604,
    doi:<a href="https://doi.org/10.1145/2488608.2488683">10.1145/2488608.2488683</a>.'
  short: M. Čadek, M. Krcál, J. Matoušek, L. Vokřínek, U. Wagner, in:, 45th Annual
    ACM Symposium on Theory of Computing, ACM, 2013, pp. 595–604.
conference:
  end_date: 2013-06-04
  location: Palo Alto, CA, United States
  name: 'STOC: Symposium on the Theory of Computing'
  start_date: 2013-06-01
date_created: 2018-12-11T11:59:42Z
date_published: 2013-06-01T00:00:00Z
date_updated: 2021-01-12T06:59:51Z
day: '01'
ddc:
- '510'
department:
- _id: UlWa
- _id: HeEd
doi: 10.1145/2488608.2488683
file:
- access_level: open_access
  checksum: 06c2ce5c1135fbc1f71ca15eeb242dcf
  content_type: application/pdf
  creator: system
  date_created: 2018-12-12T10:14:29Z
  date_updated: 2020-07-14T12:45:48Z
  file_id: '5081'
  file_name: IST-2016-533-v1+1_Extending_continuous_maps_polynomiality_and_undecidability.pdf
  file_size: 447945
  relation: main_file
file_date_updated: 2020-07-14T12:45:48Z
has_accepted_license: '1'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Submitted Version
page: 595 - 604
publication: 45th Annual ACM Symposium on theory of computing
publication_status: published
publisher: ACM
publist_id: '4078'
pubrep_id: '533'
quality_controlled: '1'
scopus_import: 1
status: public
title: 'Extending continuous maps: Polynomiality and undecidability'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2013'
...
---
_id: '2812'
abstract:
- lang: eng
  text: 'We consider the problem of deciding whether the persistent homology group
    of a simplicial pair (K, L) can be realized as the homology H* (X) of some complex
    X with L ⊂ X ⊂ K. We show that this problem is NP-complete even if K is embedded
    in ℝ3. As a consequence, we show that it is NP-hard to simplify level and sublevel
    sets of scalar functions on S3 within a given tolerance constraint. This problem
    has relevance to the visualization of medical images by isosurfaces. We also show
    an implication to the theory of well groups of scalar functions: not every well
    group can be realized by some level set, and deciding whether a well group can
    be realized is NP-hard.'
acknowledgement: Some of the authors were partially supported by the GIGA ANR grant
  (contract ANR-09-BLAN-0331-01) and the European project CG-Learning (contract 255827).
author:
- first_name: Dominique
  full_name: Attali, Dominique
  last_name: Attali
- first_name: Ulrich
  full_name: Bauer, Ulrich
  id: 2ADD483A-F248-11E8-B48F-1D18A9856A87
  last_name: Bauer
  orcid: 0000-0002-9683-0724
- first_name: Olivier
  full_name: Devillers, Olivier
  last_name: Devillers
- first_name: Marc
  full_name: Glisse, Marc
  last_name: Glisse
- first_name: André
  full_name: Lieutier, André
  last_name: Lieutier
citation:
  ama: 'Attali D, Bauer U, Devillers O, Glisse M, Lieutier A. Homological reconstruction
    and simplification in R3. In: <i>Proceedings of the 29th Annual Symposium on Computational
    Geometry</i>. ACM; 2013:117-125. doi:<a href="https://doi.org/10.1145/2462356.2462373">10.1145/2462356.2462373</a>'
  apa: 'Attali, D., Bauer, U., Devillers, O., Glisse, M., &#38; Lieutier, A. (2013).
    Homological reconstruction and simplification in R3. In <i>Proceedings of the
    29th annual symposium on Computational Geometry</i> (pp. 117–125). Rio de Janeiro,
    Brazil: ACM. <a href="https://doi.org/10.1145/2462356.2462373">https://doi.org/10.1145/2462356.2462373</a>'
  chicago: Attali, Dominique, Ulrich Bauer, Olivier Devillers, Marc Glisse, and André
    Lieutier. “Homological Reconstruction and Simplification in R3.” In <i>Proceedings
    of the 29th Annual Symposium on Computational Geometry</i>, 117–25. ACM, 2013.
    <a href="https://doi.org/10.1145/2462356.2462373">https://doi.org/10.1145/2462356.2462373</a>.
  ieee: D. Attali, U. Bauer, O. Devillers, M. Glisse, and A. Lieutier, “Homological
    reconstruction and simplification in R3,” in <i>Proceedings of the 29th annual
    symposium on Computational Geometry</i>, Rio de Janeiro, Brazil, 2013, pp. 117–125.
  ista: 'Attali D, Bauer U, Devillers O, Glisse M, Lieutier A. 2013. Homological reconstruction
    and simplification in R3. Proceedings of the 29th annual symposium on Computational
    Geometry. SoCG: Symposium on Computational Geometry, 117–125.'
  mla: Attali, Dominique, et al. “Homological Reconstruction and Simplification in
    R3.” <i>Proceedings of the 29th Annual Symposium on Computational Geometry</i>,
    ACM, 2013, pp. 117–25, doi:<a href="https://doi.org/10.1145/2462356.2462373">10.1145/2462356.2462373</a>.
  short: D. Attali, U. Bauer, O. Devillers, M. Glisse, A. Lieutier, in:, Proceedings
    of the 29th Annual Symposium on Computational Geometry, ACM, 2013, pp. 117–125.
conference:
  end_date: 2013-06-20
  location: Rio de Janeiro, Brazil
  name: 'SoCG: Symposium on Computational Geometry'
  start_date: 2013-06-17
date_created: 2018-12-11T11:59:44Z
date_published: 2013-06-01T00:00:00Z
date_updated: 2023-02-23T10:15:15Z
day: '01'
department:
- _id: HeEd
doi: 10.1145/2462356.2462373
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://hal.archives-ouvertes.fr/hal-00833791/
month: '06'
oa: 1
oa_version: Submitted Version
page: 117 - 125
publication: Proceedings of the 29th annual symposium on Computational Geometry
publication_status: published
publisher: ACM
publist_id: '4072'
quality_controlled: '1'
related_material:
  record:
  - id: '1805'
    relation: later_version
    status: public
scopus_import: 1
status: public
title: Homological reconstruction and simplification in R3
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2013'
...
---
_id: '2815'
abstract:
- lang: eng
  text: The fact that a sum of isotropic Gaussian kernels can have more modes than
    kernels is surprising. Extra (ghost) modes do not exist in ℝ1 and are generally
    not well studied in higher dimensions. We study a configuration of n+1 Gaussian
    kernels for which there are exactly n+2 modes. We show that all modes lie on a
    finite set of lines, which we call axes, and study the restriction of the Gaussian
    mixture to these axes in order to discover that there are an exponential number
    of critical points in this configuration. Although the existence of ghost modes
    remained unknown due to the difficulty of finding examples in ℝ2, we show that
    the resilience of ghost modes grows like the square root of the dimension. In
    addition, we exhibit finite configurations of isotropic Gaussian kernels with
    superlinearly many modes.
acknowledgement: This research is partially supported by the National Science Foundation
  (NSF) under Grant DBI-0820624, by the European Science Foundation under the Research
  Networking Programme, and the Russian Government Project 11.G34.31.0053.
article_processing_charge: No
article_type: original
author:
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
- first_name: Brittany Terese
  full_name: Fasy, Brittany Terese
  id: F65D502E-E68D-11E9-9252-C644099818F6
  last_name: Fasy
- first_name: Günter
  full_name: Rote, Günter
  last_name: Rote
citation:
  ama: 'Edelsbrunner H, Fasy BT, Rote G. Add isotropic Gaussian kernels at own risk:
    More and more resilient modes in higher dimensions. <i>Discrete &#38; Computational
    Geometry</i>. 2013;49(4):797-822. doi:<a href="https://doi.org/10.1007/s00454-013-9517-x">10.1007/s00454-013-9517-x</a>'
  apa: 'Edelsbrunner, H., Fasy, B. T., &#38; Rote, G. (2013). Add isotropic Gaussian
    kernels at own risk: More and more resilient modes in higher dimensions. <i>Discrete
    &#38; Computational Geometry</i>. Springer. <a href="https://doi.org/10.1007/s00454-013-9517-x">https://doi.org/10.1007/s00454-013-9517-x</a>'
  chicago: 'Edelsbrunner, Herbert, Brittany Terese Fasy, and Günter Rote. “Add Isotropic
    Gaussian Kernels at Own Risk: More and More Resilient Modes in Higher Dimensions.”
    <i>Discrete &#38; Computational Geometry</i>. Springer, 2013. <a href="https://doi.org/10.1007/s00454-013-9517-x">https://doi.org/10.1007/s00454-013-9517-x</a>.'
  ieee: 'H. Edelsbrunner, B. T. Fasy, and G. Rote, “Add isotropic Gaussian kernels
    at own risk: More and more resilient modes in higher dimensions,” <i>Discrete
    &#38; Computational Geometry</i>, vol. 49, no. 4. Springer, pp. 797–822, 2013.'
  ista: 'Edelsbrunner H, Fasy BT, Rote G. 2013. Add isotropic Gaussian kernels at
    own risk: More and more resilient modes in higher dimensions. Discrete &#38; Computational
    Geometry. 49(4), 797–822.'
  mla: 'Edelsbrunner, Herbert, et al. “Add Isotropic Gaussian Kernels at Own Risk:
    More and More Resilient Modes in Higher Dimensions.” <i>Discrete &#38; Computational
    Geometry</i>, vol. 49, no. 4, Springer, 2013, pp. 797–822, doi:<a href="https://doi.org/10.1007/s00454-013-9517-x">10.1007/s00454-013-9517-x</a>.'
  short: H. Edelsbrunner, B.T. Fasy, G. Rote, Discrete &#38; Computational Geometry
    49 (2013) 797–822.
date_created: 2018-12-11T11:59:44Z
date_published: 2013-06-01T00:00:00Z
date_updated: 2023-02-23T11:13:49Z
day: '01'
department:
- _id: HeEd
doi: 10.1007/s00454-013-9517-x
intvolume: '        49'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1007/s00454-013-9517-x
month: '06'
oa: 1
oa_version: Published Version
page: 797 - 822
publication: Discrete & Computational Geometry
publication_identifier:
  eissn:
  - 1432-0444
  issn:
  - 0179-5376
publication_status: published
publisher: Springer
publist_id: '3991'
quality_controlled: '1'
related_material:
  record:
  - id: '3134'
    relation: earlier_version
    status: public
scopus_import: '1'
status: public
title: 'Add isotropic Gaussian kernels at own risk: More and more resilient modes
  in higher dimensions'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 49
year: '2013'
...
---
_id: '2822'
abstract:
- lang: eng
  text: Identification of genes that control root system architecture in crop plants
    requires innovations that enable high-throughput and accurate measurements of
    root system architecture through time. We demonstrate the ability of a semiautomated
    3D in vivo imaging and digital phenotyping pipeline to interrogate the quantitative
    genetic basis of root system growth in a rice biparental mapping population, Bala
    x Azucena. We phenotyped &gt;1,400 3D root models and &gt;57,000 2D images for
    a suite of 25 traits that quantified the distribution, shape, extent of exploration,
    and the intrinsic size of root networks at days 12, 14, and 16 of growth in a
    gellan gum medium. From these data we identified 89 quantitative trait loci, some
    of which correspond to those found previously in soil-grown plants, and provide
    evidence for genetic tradeoffs in root growth allocations, such as between the
    extent and thoroughness of exploration. We also developed a multivariate method
    for generating and mapping central root architecture phenotypes and used it to
    identify five major quantitative trait loci (r2 = 24-37%), two of which were not
    identified by our univariate analysis. Our imaging and analytical platform provides
    a means to identify genes with high potential for improving root traits and agronomic
    qualities of crops.
author:
- first_name: Christopher
  full_name: Topp, Christopher
  last_name: Topp
- first_name: Anjali
  full_name: Iyer Pascuzzi, Anjali
  last_name: Iyer Pascuzzi
- first_name: Jill
  full_name: Anderson, Jill
  last_name: Anderson
- first_name: Cheng
  full_name: Lee, Cheng
  last_name: Lee
- first_name: Paul
  full_name: Zurek, Paul
  last_name: Zurek
- first_name: Olga
  full_name: Symonova, Olga
  id: 3C0C7BC6-F248-11E8-B48F-1D18A9856A87
  last_name: Symonova
- first_name: Ying
  full_name: Zheng, Ying
  last_name: Zheng
- first_name: Alexander
  full_name: Bucksch, Alexander
  last_name: Bucksch
- first_name: Yuriy
  full_name: Mileyko, Yuriy
  last_name: Mileyko
- first_name: Taras
  full_name: Galkovskyi, Taras
  last_name: Galkovskyi
- first_name: Brad
  full_name: Moore, Brad
  last_name: Moore
- first_name: John
  full_name: Harer, John
  last_name: Harer
- first_name: Herbert
  full_name: Edelsbrunner, Herbert
  id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
  last_name: Edelsbrunner
  orcid: 0000-0002-9823-6833
- first_name: Thomas
  full_name: Mitchell Olds, Thomas
  last_name: Mitchell Olds
- first_name: Joshua
  full_name: Weitz, Joshua
  last_name: Weitz
- first_name: Philip
  full_name: Benfey, Philip
  last_name: Benfey
citation:
  ama: Topp C, Iyer Pascuzzi A, Anderson J, et al. 3D phenotyping and quantitative
    trait locus mapping identify core regions of the rice genome controlling root
    architecture. <i>PNAS</i>. 2013;110(18):E1695-E1704. doi:<a href="https://doi.org/10.1073/pnas.1304354110">10.1073/pnas.1304354110</a>
  apa: Topp, C., Iyer Pascuzzi, A., Anderson, J., Lee, C., Zurek, P., Symonova, O.,
    … Benfey, P. (2013). 3D phenotyping and quantitative trait locus mapping identify
    core regions of the rice genome controlling root architecture. <i>PNAS</i>. National
    Academy of Sciences. <a href="https://doi.org/10.1073/pnas.1304354110">https://doi.org/10.1073/pnas.1304354110</a>
  chicago: Topp, Christopher, Anjali Iyer Pascuzzi, Jill Anderson, Cheng Lee, Paul
    Zurek, Olga Symonova, Ying Zheng, et al. “3D Phenotyping and Quantitative Trait
    Locus Mapping Identify Core Regions of the Rice Genome Controlling Root Architecture.”
    <i>PNAS</i>. National Academy of Sciences, 2013. <a href="https://doi.org/10.1073/pnas.1304354110">https://doi.org/10.1073/pnas.1304354110</a>.
  ieee: C. Topp <i>et al.</i>, “3D phenotyping and quantitative trait locus mapping
    identify core regions of the rice genome controlling root architecture,” <i>PNAS</i>,
    vol. 110, no. 18. National Academy of Sciences, pp. E1695–E1704, 2013.
  ista: Topp C, Iyer Pascuzzi A, Anderson J, Lee C, Zurek P, Symonova O, Zheng Y,
    Bucksch A, Mileyko Y, Galkovskyi T, Moore B, Harer J, Edelsbrunner H, Mitchell
    Olds T, Weitz J, Benfey P. 2013. 3D phenotyping and quantitative trait locus mapping
    identify core regions of the rice genome controlling root architecture. PNAS.
    110(18), E1695–E1704.
  mla: Topp, Christopher, et al. “3D Phenotyping and Quantitative Trait Locus Mapping
    Identify Core Regions of the Rice Genome Controlling Root Architecture.” <i>PNAS</i>,
    vol. 110, no. 18, National Academy of Sciences, 2013, pp. E1695–704, doi:<a href="https://doi.org/10.1073/pnas.1304354110">10.1073/pnas.1304354110</a>.
  short: C. Topp, A. Iyer Pascuzzi, J. Anderson, C. Lee, P. Zurek, O. Symonova, Y.
    Zheng, A. Bucksch, Y. Mileyko, T. Galkovskyi, B. Moore, J. Harer, H. Edelsbrunner,
    T. Mitchell Olds, J. Weitz, P. Benfey, PNAS 110 (2013) E1695–E1704.
date_created: 2018-12-11T11:59:47Z
date_published: 2013-04-30T00:00:00Z
date_updated: 2021-01-12T06:59:58Z
day: '30'
department:
- _id: MaJö
- _id: HeEd
doi: 10.1073/pnas.1304354110
external_id:
  pmid:
  - '25673779'
intvolume: '       110'
issue: '18'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4378147/
month: '04'
oa: 1
oa_version: Submitted Version
page: E1695 - E1704
pmid: 1
publication: PNAS
publication_status: published
publisher: National Academy of Sciences
publist_id: '3979'
quality_controlled: '1'
scopus_import: 1
status: public
title: 3D phenotyping and quantitative trait locus mapping identify core regions of
  the rice genome controlling root architecture
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 110
year: '2013'
...
