{"date_published":"2016-08-01T00:00:00Z","license":"https://creativecommons.org/licenses/by/4.0/","publisher":"Schloss Dagstuhl- Leibniz-Zentrum fur Informatik","year":"2016","ec_funded":1,"day":"01","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"file":[{"content_type":"application/pdf","file_size":579225,"access_level":"open_access","relation":"main_file","file_name":"IST-2017-777-v1+1_LIPIcs-ESA-2016-28.pdf","date_created":"2018-12-12T10:14:31Z","file_id":"5084","creator":"system","date_updated":"2018-12-12T10:14:31Z"}],"intvolume":"        57","pubrep_id":"777","language":[{"iso":"eng"}],"publist_id":"6312","oa_version":"Published Version","scopus_import":1,"quality_controlled":"1","title":"Optimal reachability and a space time tradeoff for distance queries in constant treewidth graphs","citation":{"apa":"Chatterjee, K., Ibsen-Jensen, R., &#38; Pavlogiannis, A. (2016). Optimal reachability and a space time tradeoff for distance queries in constant treewidth graphs (Vol. 57). Presented at the ESA: European Symposium on Algorithms, Aarhus, Denmark: Schloss Dagstuhl- Leibniz-Zentrum fur Informatik. <a href=\"https://doi.org/10.4230/LIPIcs.ESA.2016.28\">https://doi.org/10.4230/LIPIcs.ESA.2016.28</a>","ista":"Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. 2016. Optimal reachability and a space time tradeoff for distance queries in constant treewidth graphs. ESA: European Symposium on Algorithms, LIPIcs, vol. 57, 28.","chicago":"Chatterjee, Krishnendu, Rasmus Ibsen-Jensen, and Andreas Pavlogiannis. “Optimal Reachability and a Space Time Tradeoff for Distance Queries in Constant Treewidth Graphs,” Vol. 57. Schloss Dagstuhl- Leibniz-Zentrum fur Informatik, 2016. <a href=\"https://doi.org/10.4230/LIPIcs.ESA.2016.28\">https://doi.org/10.4230/LIPIcs.ESA.2016.28</a>.","ieee":"K. Chatterjee, R. Ibsen-Jensen, and A. Pavlogiannis, “Optimal reachability and a space time tradeoff for distance queries in constant treewidth graphs,” presented at the ESA: European Symposium on Algorithms, Aarhus, Denmark, 2016, vol. 57.","mla":"Chatterjee, Krishnendu, et al. <i>Optimal Reachability and a Space Time Tradeoff for Distance Queries in Constant Treewidth Graphs</i>. Vol. 57, 28, Schloss Dagstuhl- Leibniz-Zentrum fur Informatik, 2016, doi:<a href=\"https://doi.org/10.4230/LIPIcs.ESA.2016.28\">10.4230/LIPIcs.ESA.2016.28</a>.","ama":"Chatterjee K, Ibsen-Jensen R, Pavlogiannis A. Optimal reachability and a space time tradeoff for distance queries in constant treewidth graphs. In: Vol 57. Schloss Dagstuhl- Leibniz-Zentrum fur Informatik; 2016. doi:<a href=\"https://doi.org/10.4230/LIPIcs.ESA.2016.28\">10.4230/LIPIcs.ESA.2016.28</a>","short":"K. Chatterjee, R. Ibsen-Jensen, A. Pavlogiannis, in:, Schloss Dagstuhl- Leibniz-Zentrum fur Informatik, 2016."},"month":"08","date_created":"2018-12-11T11:49:59Z","acknowledgement":"The research was partly supported by Austrian Science Fund (FWF) Grant No P23499-N23, FWF NFN Grant No S11407-N23 (RiSE/SHiNE) and ERC Start grant (279307: Graph Games).","department":[{"_id":"KrCh"}],"ddc":["004","006"],"user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","oa":1,"file_date_updated":"2018-12-12T10:14:31Z","project":[{"_id":"2584A770-B435-11E9-9278-68D0E5697425","grant_number":"P 23499-N23","name":"Modern Graph Algorithmic Techniques in Formal Verification","call_identifier":"FWF"},{"name":"Rigorous Systems Engineering","call_identifier":"FWF","grant_number":"S 11407_N23","_id":"25832EC2-B435-11E9-9278-68D0E5697425"},{"_id":"2581B60A-B435-11E9-9278-68D0E5697425","grant_number":"279307","name":"Quantitative Graph Games: Theory and Applications","call_identifier":"FP7"}],"status":"public","date_updated":"2023-09-07T12:01:58Z","volume":57,"has_accepted_license":"1","type":"conference","publication_status":"published","article_number":"28","abstract":[{"text":"We consider data-structures for answering reachability and distance queries on constant-treewidth graphs with n nodes, on the standard RAM computational model with wordsize W=Theta(log n). Our first contribution is a data-structure that after O(n) preprocessing time, allows (1) pair reachability queries in O(1) time; and (2) single-source reachability queries in O(n/log n) time. This is (asymptotically) optimal and is faster than DFS/BFS when answering more than a constant number of single-source queries. The data-structure uses at all times O(n) space. Our second contribution is a space-time tradeoff data-structure for distance queries. For any epsilon in [1/2,1], we provide a data-structure with polynomial preprocessing time that allows pair queries in O(n^{1-\\epsilon} alpha(n)) time, where alpha is the inverse of the Ackermann function, and at all times uses O(n^epsilon) space. The input graph G is not considered in the space complexity. ","lang":"eng"}],"_id":"1071","doi":"10.4230/LIPIcs.ESA.2016.28","author":[{"last_name":"Chatterjee","id":"2E5DCA20-F248-11E8-B48F-1D18A9856A87","first_name":"Krishnendu","full_name":"Chatterjee, Krishnendu","orcid":"0000-0002-4561-241X"},{"orcid":"0000-0003-4783-0389","first_name":"Rasmus","full_name":"Ibsen-Jensen, Rasmus","id":"3B699956-F248-11E8-B48F-1D18A9856A87","last_name":"Ibsen-Jensen"},{"orcid":"0000-0002-8943-0722","first_name":"Andreas","full_name":"Pavlogiannis, Andreas","id":"49704004-F248-11E8-B48F-1D18A9856A87","last_name":"Pavlogiannis"}],"conference":{"location":"Aarhus, Denmark","name":"ESA: European Symposium on Algorithms","end_date":"2016-08-24","start_date":"2016-08-22"},"related_material":{"record":[{"status":"public","id":"821","relation":"dissertation_contains"}]},"alternative_title":["LIPIcs"]}