--- _id: '2237' abstract: - lang: eng text: We describe new extensions of the Vampire theorem prover for computing tree interpolants. These extensions generalize Craig interpolation in Vampire, and can also be used to derive sequence interpolants. We evaluated our implementation on a large number of examples over the theory of linear integer arithmetic and integer-indexed arrays, with and without quantifiers. When compared to other methods, our experiments show that some examples could only be solved by our implementation. alternative_title: - LNCS article_processing_charge: No author: - first_name: Régis full_name: Blanc, Régis last_name: Blanc - first_name: Ashutosh full_name: Gupta, Ashutosh id: 335E5684-F248-11E8-B48F-1D18A9856A87 last_name: Gupta - first_name: Laura full_name: Kovács, Laura last_name: Kovács - first_name: Bernhard full_name: Kragl, Bernhard id: 320FC952-F248-11E8-B48F-1D18A9856A87 last_name: Kragl orcid: 0000-0001-7745-9117 citation: ama: Blanc R, Gupta A, Kovács L, Kragl B. Tree interpolation in Vampire. 2013;8312:173-181. doi:10.1007/978-3-642-45221-5_13 apa: 'Blanc, R., Gupta, A., Kovács, L., & Kragl, B. (2013). Tree interpolation in Vampire. Presented at the LPAR: Logic for Programming, Artificial Intelligence, and Reasoning, Stellenbosch, South Africa: Springer. https://doi.org/10.1007/978-3-642-45221-5_13' chicago: Blanc, Régis, Ashutosh Gupta, Laura Kovács, and Bernhard Kragl. “Tree Interpolation in Vampire.” Lecture Notes in Computer Science. Springer, 2013. https://doi.org/10.1007/978-3-642-45221-5_13. ieee: R. Blanc, A. Gupta, L. Kovács, and B. Kragl, “Tree interpolation in Vampire,” vol. 8312. Springer, pp. 173–181, 2013. ista: Blanc R, Gupta A, Kovács L, Kragl B. 2013. Tree interpolation in Vampire. 8312, 173–181. mla: Blanc, Régis, et al. Tree Interpolation in Vampire. Vol. 8312, Springer, 2013, pp. 173–81, doi:10.1007/978-3-642-45221-5_13. short: R. Blanc, A. Gupta, L. Kovács, B. Kragl, 8312 (2013) 173–181. conference: end_date: 2013-12-19 location: Stellenbosch, South Africa name: 'LPAR: Logic for Programming, Artificial Intelligence, and Reasoning' start_date: 2013-12-14 date_created: 2018-12-11T11:56:29Z date_published: 2013-01-14T00:00:00Z date_updated: 2020-08-11T10:09:42Z day: '14' ddc: - '000' department: - _id: ToHe doi: 10.1007/978-3-642-45221-5_13 file: - access_level: open_access checksum: 9cebaafca032e6769d273f393305c705 content_type: application/pdf creator: dernst date_created: 2020-05-15T11:10:40Z date_updated: 2020-07-14T12:45:34Z file_id: '7858' file_name: 2013_LPAR_Blanc.pdf file_size: 279206 relation: main_file file_date_updated: 2020-07-14T12:45:34Z has_accepted_license: '1' intvolume: ' 8312' language: - iso: eng month: '01' oa: 1 oa_version: Submitted Version page: 173 - 181 project: - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering publication_status: published publisher: Springer publist_id: '4724' quality_controlled: '1' scopus_import: 1 series_title: Lecture Notes in Computer Science status: public title: Tree interpolation in Vampire type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 8312 year: '2013' ... --- _id: '2238' abstract: - lang: eng text: "We study the problem of achieving a given value in Markov decision processes (MDPs) with several independent discounted reward objectives. We consider a generalised version of discounted reward objectives, in which the amount of discounting depends on the states visited and on the objective. This definition extends the usual definition of discounted reward, and allows to capture the systems in which the value of different commodities diminish at different and variable rates.\r\n\r\nWe establish results for two prominent subclasses of the problem, namely state-discount models where the discount factors are only dependent on the state of the MDP (and independent of the objective), and reward-discount models where they are only dependent on the objective (but not on the state of the MDP). For the state-discount models we use a straightforward reduction to expected total reward and show that the problem whether a value is achievable can be solved in polynomial time. For the reward-discount model we show that memory and randomisation of the strategies are required, but nevertheless that the problem is decidable and it is sufficient to consider strategies which after a certain number of steps behave in a memoryless way.\r\n\r\nFor the general case, we show that when restricted to graphs (i.e. MDPs with no randomisation), pure strategies and discount factors of the form 1/n where n is an integer, the problem is in PSPACE and finite memory suffices for achieving a given value. We also show that when the discount factors are not of the form 1/n, the memory required by a strategy can be infinite.\r\n" alternative_title: - LNCS author: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Vojtěch full_name: Forejt, Vojtěch last_name: Forejt - first_name: Dominik full_name: Wojtczak, Dominik last_name: Wojtczak citation: ama: Chatterjee K, Forejt V, Wojtczak D. Multi-objective discounted reward verification in graphs and MDPs. 2013;8312:228-242. doi:10.1007/978-3-642-45221-5_17 apa: 'Chatterjee, K., Forejt, V., & Wojtczak, D. (2013). Multi-objective discounted reward verification in graphs and MDPs. Presented at the LPAR: Logic for Programming, Artificial Intelligence, and Reasoning, Stellenbosch, South Africa: Springer. https://doi.org/10.1007/978-3-642-45221-5_17' chicago: Chatterjee, Krishnendu, Vojtěch Forejt, and Dominik Wojtczak. “Multi-Objective Discounted Reward Verification in Graphs and MDPs.” Lecture Notes in Computer Science. Springer, 2013. https://doi.org/10.1007/978-3-642-45221-5_17. ieee: K. Chatterjee, V. Forejt, and D. Wojtczak, “Multi-objective discounted reward verification in graphs and MDPs,” vol. 8312. Springer, pp. 228–242, 2013. ista: Chatterjee K, Forejt V, Wojtczak D. 2013. Multi-objective discounted reward verification in graphs and MDPs. 8312, 228–242. mla: Chatterjee, Krishnendu, et al. Multi-Objective Discounted Reward Verification in Graphs and MDPs. Vol. 8312, Springer, 2013, pp. 228–42, doi:10.1007/978-3-642-45221-5_17. short: K. Chatterjee, V. Forejt, D. Wojtczak, 8312 (2013) 228–242. conference: end_date: 2013-12-19 location: Stellenbosch, South Africa name: 'LPAR: Logic for Programming, Artificial Intelligence, and Reasoning' start_date: 2013-12-14 date_created: 2018-12-11T11:56:30Z date_published: 2013-12-01T00:00:00Z date_updated: 2020-08-11T10:09:42Z day: '01' department: - _id: KrCh doi: 10.1007/978-3-642-45221-5_17 ec_funded: 1 intvolume: ' 8312' language: - iso: eng month: '12' oa_version: None page: 228 - 242 project: - _id: 2581B60A-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '279307' name: 'Quantitative Graph Games: Theory and Applications' publication_status: published publisher: Springer publist_id: '4723' quality_controlled: '1' scopus_import: 1 series_title: Lecture Notes in Computer Science status: public title: Multi-objective discounted reward verification in graphs and MDPs type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 8312 year: '2013' ... --- _id: '2243' abstract: - lang: eng text: We show that modal logic over universally first-order definable classes of transitive frames is decidable. More precisely, let K be an arbitrary class of transitive Kripke frames definable by a universal first-order sentence. We show that the global and finite global satisfiability problems of modal logic over K are decidable in NP, regardless of choice of K. We also show that the local satisfiability and the finite local satisfiability problems of modal logic over K are decidable in NEXPTIME. alternative_title: - LIPIcs author: - first_name: Jakub full_name: Michaliszyn, Jakub last_name: Michaliszyn - first_name: Jan full_name: Otop, Jan id: 2FC5DA74-F248-11E8-B48F-1D18A9856A87 last_name: Otop citation: ama: Michaliszyn J, Otop J. Elementary modal logics over transitive structures. 2013;23:563-577. doi:10.4230/LIPIcs.CSL.2013.563 apa: 'Michaliszyn, J., & Otop, J. (2013). Elementary modal logics over transitive structures. Presented at the CSL: Computer Science Logic, Torino, Italy: Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.CSL.2013.563' chicago: Michaliszyn, Jakub, and Jan Otop. “Elementary Modal Logics over Transitive Structures.” Leibniz International Proceedings in Informatics. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2013. https://doi.org/10.4230/LIPIcs.CSL.2013.563. ieee: J. Michaliszyn and J. Otop, “Elementary modal logics over transitive structures,” vol. 23. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, pp. 563–577, 2013. ista: Michaliszyn J, Otop J. 2013. Elementary modal logics over transitive structures. 23, 563–577. mla: Michaliszyn, Jakub, and Jan Otop. Elementary Modal Logics over Transitive Structures. Vol. 23, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2013, pp. 563–77, doi:10.4230/LIPIcs.CSL.2013.563. short: J. Michaliszyn, J. Otop, 23 (2013) 563–577. conference: end_date: 2013-09-05 location: Torino, Italy name: 'CSL: Computer Science Logic' start_date: 2013-09-02 date_created: 2018-12-11T11:56:32Z date_published: 2013-09-01T00:00:00Z date_updated: 2020-08-11T10:09:42Z day: '01' ddc: - '000' - '004' department: - _id: ToHe doi: 10.4230/LIPIcs.CSL.2013.563 ec_funded: 1 file: - access_level: open_access checksum: e0732e73a8b1e39483df7717d53e3e35 content_type: application/pdf creator: system date_created: 2018-12-12T10:12:11Z date_updated: 2020-07-14T12:45:34Z file_id: '4929' file_name: IST-2016-136-v1+2_39.pdf file_size: 454915 relation: main_file file_date_updated: 2020-07-14T12:45:34Z has_accepted_license: '1' intvolume: ' 23' language: - iso: eng month: '09' oa: 1 oa_version: Published Version page: 563 - 577 project: - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 25EE3708-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '267989' name: Quantitative Reactive Modeling publication_status: published publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik publist_id: '4708' pubrep_id: '136' quality_controlled: '1' scopus_import: 1 series_title: Leibniz International Proceedings in Informatics status: public title: Elementary modal logics over transitive structures 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: 23 year: '2013' ... --- _id: '2244' abstract: - lang: eng text: 'We consider two systems (α1,...,αm) and (β1,...,βn) of curves drawn on a compact two-dimensional surface ℳ with boundary. Each αi and each βj is either an arc meeting the boundary of ℳ at its two endpoints, or a closed curve. The αi are pairwise disjoint except for possibly sharing endpoints, and similarly for the βj. We want to "untangle" the βj from the αi by a self-homeomorphism of ℳ; more precisely, we seek an homeomorphism φ: ℳ → ℳ fixing the boundary of ℳ pointwise such that the total number of crossings of the αi with the φ(βj) is as small as possible. This problem is motivated by an application in the algorithmic theory of embeddings and 3-manifolds. We prove that if ℳ is planar, i.e., a sphere with h ≥ 0 boundary components ("holes"), then O(mn) crossings can be achieved (independently of h), which is asymptotically tight, as an easy lower bound shows. In general, for an arbitrary (orientable or nonorientable) surface ℳ with h holes and of (orientable or nonorientable) genus g ≥ 0, we obtain an O((m + n)4) upper bound, again independent of h and g. ' acknowledgement: We would like to thank the authors of [GHR13] for mak- ing a draft of their paper available to us, and, in particular, T. Huynh for an e-mail correspondence. alternative_title: - LNCS author: - first_name: Jiří full_name: Matoušek, Jiří last_name: Matoušek - first_name: Eric full_name: Sedgwick, Eric last_name: Sedgwick - first_name: Martin full_name: Tancer, Martin id: 38AC689C-F248-11E8-B48F-1D18A9856A87 last_name: Tancer orcid: 0000-0002-1191-6714 - first_name: Uli full_name: Wagner, Uli id: 36690CA2-F248-11E8-B48F-1D18A9856A87 last_name: Wagner orcid: 0000-0002-1494-0568 citation: ama: Matoušek J, Sedgwick E, Tancer M, Wagner U. Untangling two systems of noncrossing curves. 2013;8242:472-483. doi:10.1007/978-3-319-03841-4_41 apa: 'Matoušek, J., Sedgwick, E., Tancer, M., & Wagner, U. (2013). Untangling two systems of noncrossing curves. Presented at the GD: Graph Drawing and Network Visualization, Bordeaux, France: Springer. https://doi.org/10.1007/978-3-319-03841-4_41' chicago: Matoušek, Jiří, Eric Sedgwick, Martin Tancer, and Uli Wagner. “Untangling Two Systems of Noncrossing Curves.” Lecture Notes in Computer Science. Springer, 2013. https://doi.org/10.1007/978-3-319-03841-4_41. ieee: J. Matoušek, E. Sedgwick, M. Tancer, and U. Wagner, “Untangling two systems of noncrossing curves,” vol. 8242. Springer, pp. 472–483, 2013. ista: Matoušek J, Sedgwick E, Tancer M, Wagner U. 2013. Untangling two systems of noncrossing curves. 8242, 472–483. mla: Matoušek, Jiří, et al. Untangling Two Systems of Noncrossing Curves. Vol. 8242, Springer, 2013, pp. 472–83, doi:10.1007/978-3-319-03841-4_41. short: J. Matoušek, E. Sedgwick, M. Tancer, U. Wagner, 8242 (2013) 472–483. conference: end_date: 2013-09-25 location: Bordeaux, France name: 'GD: Graph Drawing and Network Visualization' start_date: 2013-09-23 date_created: 2018-12-11T11:56:32Z date_published: 2013-09-01T00:00:00Z date_updated: 2023-02-21T17:03:07Z day: '01' department: - _id: UlWa doi: 10.1007/978-3-319-03841-4_41 external_id: arxiv: - '1302.6475' intvolume: ' 8242' language: - iso: eng main_file_link: - open_access: '1' url: http://arxiv.org/abs/1302.6475 month: '09' oa: 1 oa_version: Preprint page: 472 - 483 project: - _id: 25FA3206-B435-11E9-9278-68D0E5697425 grant_number: PP00P2_138948 name: 'Embeddings in Higher Dimensions: Algorithms and Combinatorics' publication_status: published publisher: Springer publist_id: '4707' quality_controlled: '1' related_material: record: - id: '1411' relation: later_version status: public scopus_import: 1 series_title: Lecture Notes in Computer Science status: public title: Untangling two systems of noncrossing curves type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 8242 year: '2013' ... --- _id: '2259' abstract: - lang: eng text: "The learning with rounding (LWR) problem, introduced by Banerjee, Peikert and Rosen at EUROCRYPT ’12, is a variant of learning with errors (LWE), where one replaces random errors with deterministic rounding. The LWR problem was shown to be as hard as LWE for a setting of parameters where the modulus and modulus-to-error ratio are super-polynomial. In this work we resolve the main open problem and give a new reduction that works for a larger range of parameters, allowing for a polynomial modulus and modulus-to-error ratio. In particular, a smaller modulus gives us greater efficiency, and a smaller modulus-to-error ratio gives us greater security, which now follows from the worst-case hardness of GapSVP with polynomial (rather than super-polynomial) approximation factors.\r\n\r\nAs a tool in the reduction, we show that there is a “lossy mode” for the LWR problem, in which LWR samples only reveal partial information about the secret. This property gives us several interesting new applications, including a proof that LWR remains secure with weakly random secrets of sufficient min-entropy, and very simple constructions of deterministic encryption, lossy trapdoor functions and reusable extractors.\r\n\r\nOur approach is inspired by a technique of Goldwasser et al. from ICS ’10, which implicitly showed the existence of a “lossy mode” for LWE. By refining this technique, we also improve on the parameters of that work to only requiring a polynomial (instead of super-polynomial) modulus and modulus-to-error ratio.\r\n" alternative_title: - LNCS author: - first_name: Joel F full_name: Alwen, Joel F id: 2A8DFA8C-F248-11E8-B48F-1D18A9856A87 last_name: Alwen - first_name: Stephan full_name: Krenn, Stephan id: 329FCCF0-F248-11E8-B48F-1D18A9856A87 last_name: Krenn orcid: 0000-0003-2835-9093 - first_name: Krzysztof Z full_name: Pietrzak, Krzysztof Z id: 3E04A7AA-F248-11E8-B48F-1D18A9856A87 last_name: Pietrzak orcid: 0000-0002-9139-1654 - first_name: Daniel full_name: Wichs, Daniel last_name: Wichs citation: ama: 'Alwen JF, Krenn S, Pietrzak KZ, Wichs D. Learning with rounding, revisited: New reduction properties and applications. 2013;8042(1):57-74. doi:10.1007/978-3-642-40041-4_4' apa: 'Alwen, J. F., Krenn, S., Pietrzak, K. Z., & Wichs, D. (2013). Learning with rounding, revisited: New reduction properties and applications. Presented at the CRYPTO: International Cryptology Conference, Santa Barbara, CA, United States: Springer. https://doi.org/10.1007/978-3-642-40041-4_4' chicago: 'Alwen, Joel F, Stephan Krenn, Krzysztof Z Pietrzak, and Daniel Wichs. “Learning with Rounding, Revisited: New Reduction Properties and Applications.” Lecture Notes in Computer Science. Springer, 2013. https://doi.org/10.1007/978-3-642-40041-4_4.' ieee: 'J. F. Alwen, S. Krenn, K. Z. Pietrzak, and D. Wichs, “Learning with rounding, revisited: New reduction properties and applications,” vol. 8042, no. 1. Springer, pp. 57–74, 2013.' ista: 'Alwen JF, Krenn S, Pietrzak KZ, Wichs D. 2013. Learning with rounding, revisited: New reduction properties and applications. 8042(1), 57–74.' mla: 'Alwen, Joel F., et al. Learning with Rounding, Revisited: New Reduction Properties and Applications. Vol. 8042, no. 1, Springer, 2013, pp. 57–74, doi:10.1007/978-3-642-40041-4_4.' short: J.F. Alwen, S. Krenn, K.Z. Pietrzak, D. Wichs, 8042 (2013) 57–74. conference: end_date: 2013-08-22 location: Santa Barbara, CA, United States name: 'CRYPTO: International Cryptology Conference' start_date: 2013-08-18 date_created: 2018-12-11T11:56:37Z date_published: 2013-01-01T00:00:00Z date_updated: 2021-01-12T06:56:21Z day: '01' ddc: - '000' - '004' department: - _id: KrPi doi: 10.1007/978-3-642-40041-4_4 ec_funded: 1 file: - access_level: open_access checksum: 16d428408a806b8e49eecc607deab115 content_type: application/pdf creator: system date_created: 2018-12-12T10:11:55Z date_updated: 2020-07-14T12:45:35Z file_id: '4912' file_name: IST-2016-684-v1+1_098.pdf file_size: 587898 relation: main_file file_date_updated: 2020-07-14T12:45:35Z has_accepted_license: '1' intvolume: ' 8042' issue: '1' language: - iso: eng month: '01' oa: 1 oa_version: Published Version page: 57 - 74 project: - _id: 258C570E-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '259668' name: Provable Security for Physical Cryptography publication_status: published publisher: Springer publist_id: '4687' pubrep_id: '684' quality_controlled: '1' scopus_import: 1 series_title: Lecture Notes in Computer Science status: public title: 'Learning with rounding, revisited: New reduction properties and applications' type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 8042 year: '2013' ...