Wissenschaftliche Artikel

Lobo, D., Medina, J., Merkl, T. C., & Pichler, R. (2025). Minimal solutions of fuzzy relation equations via maximal independent elements. Information Sciences, 690, Article 121558. https://doi.org/10.1016/j.ins.2024.121558 ( reposiTUm)
Lanzinger, M., Okulmus, C., Pichler, R., Selzer, A., & Gottlob, G. (2025). Soft and Constrained Hypertree Width. Proceedings of the ACM on Management of Data (PACMMOD), 3(2), 1–25. https://doi.org/10.1145/3725251 ( reposiTUm)
Khamis, M. A., Ngo, H. Q., Pichler, R., Suciu, D., & Wang, Y. R. (2024). Convergence of datalog over (Pre-) Semirings. Journal of the ACM, 71(2), Article 8. https://doi.org/10.1145/3643027 ( reposiTUm)
Gottlob, G., Lanzinger, M., Okulmus, C., & Pichler, R. (2024). Fast parallel hypertree decompositions in logarithmic recursion depth. ACM Transactions on Database Systems, 49(1), 1–43. https://doi.org/10.1145/3638758 ( reposiTUm)
Arenas, M., Merkl, T. C., Pichler, R., & Riveros, C. (2024). Towards Tractability of the Diversity of Query Answers: Ultrametrics to the Rescue. Proceedings of the ACM on Management of Data (PACMMOD), 2(5), Article 215. https://doi.org/10.1145/3695833 ( reposiTUm)
Gottlob, G., Lanzinger, M., Pichler, R., & Razgon, I. (2023). Fractional covers of hypergraphs with bounded multi-intersection. Theoretical Computer Science, 979, Article 114204. https://doi.org/10.1016/j.tcs.2023.114204 ( reposiTUm)
Khamis, M. A., Ngo, H. Q., Pichler, R., Suciu, D., & Wang, Y. R. (2023). Convergence of datalog over (pre-)semirings. SIGMOD RECORD, 52(1), 75–82. https://doi.org/10.1145/3604437.3604454 ( reposiTUm)
Angles, R., Gottlob, G., Pavlović, A., Pichler, R., & Sallinger, E. (2023). SparqLog: A System for Efficient Evaluation of SPARQL 1.1 Queries via Datalog. Proceedings of the VLDB Endowment, 16(13), 4240–4253. https://doi.org/10.14778/3625054.3625061 ( reposiTUm)
Khamis, M. A., Ngo, H. Q., Pichler, R., Suciu, D., & Wang, Y. R. (2022). Datalog in Wonderland. SIGMOD RECORD, 51(2), 6–17. https://doi.org/10.1145/3552490.3552492 ( reposiTUm)
Gottlob, G., Okulmus, C., & Pichler, R. (2022). Fast and parallel decomposition of constraint satisfaction problems. Constraints, 27, 284–326. https://doi.org/10.1007/s10601-022-09332-1 ( reposiTUm)
Fischl, W., Gottlob, G., Longo, D. M., & Pichler, R. (2021). HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings. ACM Journal on Experimental Algorithmics, 26, 1–40. https://doi.org/10.1145/3440015 ( reposiTUm)
Pichler, R. (2020). Technical Perspective: Efficient Logspace Classes for Enumeration, Counting, and Uniform Generation. ACM SIGMOD Record, 49(1), 51–51. https://doi.org/10.1145/3422648.3422660 ( reposiTUm)
Kolaitis, P. G., Pichler, R., Sallinger, E., & Savenkov, V. (2020). On the Language of Nested Tuple Generating Dependencies. ACM Transactions on Database Systems, 45(2), 1–59. https://doi.org/10.1145/3369554 ( reposiTUm)
Creignou, N., Kröll, M., Pichler, R., Skritek, S., & Vollmer, H. (2019). A complexity theory for hard enumeration problems. Discrete Applied Mathematics, 268, 191–209. https://doi.org/10.1016/j.dam.2019.02.025 ( reposiTUm)
Boros, E., Kimelfeld, B., Pichler, R., & Schweikardt, N. (2019). Enumeration in Data Management (Dagstuhl Seminar 19211). Dagstuhl Reports, 9(5), 89–109. https://doi.org/10.4230/DagRep.9.5.89 ( reposiTUm)
Barceló, P., Kröll, M., Pichler, R., & Skritek, S. (2018). Efficient Evaluation and Static Analysis for Well-Designed Pattern Trees with Projection. ACM Transactions on Database Systems, 43(2), 1–44. https://doi.org/10.1145/3233983 ( reposiTUm)
Creignou, N., Pichler, R., & Woltran, S. (2018). Do Hard SAT-Related Reasoning Tasks Become Easier in the Krom Fragment? Logical Methods in Computer Science, 14(4), 1–25. https://doi.org/10.23638/LMCS-14(4:10)2018 ( reposiTUm)
Kolaitis, P. G., Pichler, R., Sallinger, E., & Savenkov, V. (2018). Limits of Schema Mappings. Theory of Computing Systems, 62(4), 899–940. https://doi.org/10.1007/s00224-017-9812-7 ( reposiTUm)
Bliem, B., Pichler, R., & Woltran, S. (2017). Implementing Courcelle’s Theorem in a declarative framework for dynamic programming. Journal of Logic and Computation, exv089. https://doi.org/10.1093/logcom/exv089 ( reposiTUm)
Conrad, K., Musliu, N., Pichler, R., & Werthner, H. (2016). Universities and computer science in the European crisis of refugees. Communications of the ACM, 59(10), 31–33. https://doi.org/10.1145/2893180 ( reposiTUm)
Medina, J., & Pichler, R. (2016). Fuzzy data exchange. Fuzzy Sets and Systems, 301, 129–145. https://doi.org/10.1016/j.fss.2015.12.004 ( reposiTUm)
Feinerer, I., Pichler, R., Sallinger, E., & Savenkov, V. (2015). On the undecidability of the equivalence of second-order tuple generating dependencies. Information Systems, 48, 113–129. https://doi.org/10.1016/j.is.2014.09.003 ( reposiTUm)
Pfandler, A., Pichler, R., & Woltran, S. (2015). The complexity of handling minimal solutions in logic-based abduction. Journal of Logic and Computation, 25(3), 805–825. https://doi.org/10.1093/logcom/exu053 ( reposiTUm)
Creignou, N., Papini, O., Pichler, R., & Woltran, S. (2014). Belief revision within fragments of propositional logic. Journal of Computer and System Sciences, 80(2), 427–449. https://doi.org/10.1016/j.jcss.2013.08.002 ( reposiTUm)
Pichler, R., Polleres, A., Skritek, S., & Woltran, S. (2013). Complexity of redundancy detection on RDF graphs in the presence of rules, constraints, and queries. Semantic Web: Interoperability, Usability, Applicability, 4(4), 351–393. http://hdl.handle.net/20.500.12708/155572 ( reposiTUm)
Letelier, A., Pérez, J., Pichler, R., & Skritek, S. (2013). Static Analysis and Optimization of Semantic Web Queries. ACM Transactions on Database Systems, 38(4), 1–45. https://doi.org/10.1145/2500130 ( reposiTUm)
Pichler, R., Sallinger, E., & Savenkov, V. (2013). Relaxed Notions of Schema Mapping Equivalence Revisited. Theory of Computing Systems, 52(3), 483–541. https://doi.org/10.1007/s00224-012-9397-0 ( reposiTUm)
Pichler, R., & Skritek, S. (2013). Tractable counting of the answers to conjunctive queries. Journal of Computer and System Sciences, 79(6), 984–1001. https://doi.org/10.1016/j.jcss.2013.01.012 ( reposiTUm)
Dvořák, W., Pichler, R., & Woltran, S. (2012). Towards fixed-parameter tractable algorithms for abstract argumentation. Artificial Intelligence, 186, 1–37. https://doi.org/10.1016/j.artint.2012.03.005 ( reposiTUm)
Dustdar, S., Pichler, R., Savenkov, V., & Truong, H.-L. (2012). Quality-aware Service-Oriented Data Integration: Requirements, State of the Art and Open Challenges. ACM SIGMOD Record, 41(1), 11–19. http://hdl.handle.net/20.500.12708/163519 ( reposiTUm)
PICHLER, R., RÜMMELE, S., SZEIDER, S., & WOLTRAN, S. (2012). Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth is not Enough. Theory and Practice of Logic Programming, 14(2), 141–164. https://doi.org/10.1017/s1471068412000099 ( reposiTUm)
Gottlob, G., Pichler, R., & Savenkov, V. (2011). Normalization and optimization of schema mappings. The VLDB Journal. https://doi.org/10.1007/s00778-011-0226-x ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2010). Tractable database design and datalog abduction through bounded treewidth. Information Systems, 35(3), 278–298. https://doi.org/10.1016/j.is.2009.09.003 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2010). Bounded treewidth as a key to tractability of knowledge representation and reasoning. Artificial Intelligence, 174(1), 105–132. https://doi.org/10.1016/j.artint.2009.10.003 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2010). Monadic datalog over finite structures of bounded treewidth. ACM Transactions on Computational Logic, 12(1), 1–48. https://doi.org/10.1145/1838552.1838555 ( reposiTUm)
Hermann, M., & Pichler, R. (2010). Counting complexity of propositional abduction. Journal of Computer and System Sciences, 76(7), 634–649. https://doi.org/10.1016/j.jcss.2009.12.001 ( reposiTUm)
Pichler, R., & Savenkov, V. (2010). Towards practical feasibility of core computation in data exchange. Theoretical Computer Science, 411(7–9), 935–957. https://doi.org/10.1016/j.tcs.2009.09.035 ( reposiTUm)
Hermann, M., & Pichler, R. (2009). Complexity of Counting the Optimal Solution. Theoretical Computer Science, 410(38–40), 3814–3825. http://hdl.handle.net/20.500.12708/166542 ( reposiTUm)
Fermüller, C., & Pichler, R. (2007). Model Representation over Finite and Infinite Signatures. Journal of Logic and Computation, 17(3), 453–477. https://doi.org/10.1093/logcom/exm008 ( reposiTUm)
Egly, U., Pichler, R., & Woltran, S. (2005). On Deciding Subsumption Problems. Annals of Mathematics and Artificial Intelligence, 43(1–4), 255–294. http://hdl.handle.net/20.500.12708/173345 ( reposiTUm)

Beiträge in Tagungsbänden

Ahmetaj, S., Merkl, T. C., & Pichler, R. (2024). Consistent Query Answering over SHACL Constraints. In Proceedings of the 21st International Conference on Principles of Knowledge Representation and Reasoning (KR 2024) (pp. 2–13). https://doi.org/10.24963/kr.2024/1 ( reposiTUm)
Grasmann, L., Pichler, R., & Selzer, A. (2023). Integration of Skyline Queries into Spark SQL. In F. Geerts & B. Vandevoort (Eds.), Proceedings 26th International Conference on Extending Database Technology (EDBT 2023) (pp. 337–350). OpenProceedings.org. https://doi.org/10.48786/edbt.2023.27 ( reposiTUm)
Merkl, T. C., Pichler, R., & Skritek, S. (2023). Diversity of Answers to Conjunctive Queries. In F. Geerts & B. Vandevoort (Eds.), 26th International Conference on Database Theory (pp. 10:1-10:19). Schloss Dagstuhl – Leibniz-Zentrum für Informatik GmbH, Dagstuhl Publishing. https://doi.org/10.4230/LIPICS.ICDT.2023.10 ( reposiTUm)
Merkl, T. C., Pichler, R., & Skritek, S. (2023). Diversity of Answers to Conjunctive Queries (extended Abstract). In B. Kimelfeld, M. V. Martinez, & R. Angles (Eds.), Proceedings of the 15th Alberto Mendelzon International Workshop on Foundations of Data Management (AMW 2023). https://doi.org/10.34726/5393 ( reposiTUm)
Wang, Y. R., Khamis, M. A., Ngo, H. Q., Pichler, R., & Suciu, D. (2022). Optimizing Recursive Queries with Progam Synthesis. In SIGMOD ’22: Proceedings of the 2022 International Conference on Management of Data (pp. 79–93). Association for Computing Machinery (ACM). https://doi.org/10.1145/3514221.3517827 ( reposiTUm)
Khamis, M. A., Ngo, H. Q., Pichler, R., Suciu, D., & Wang, Y. R. (2022). Convergence of Datalog over (Pre-) Semirings. In PODS ’22: Proceedings of the 41st ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems (p. 105). Association for Computing Machinery. https://doi.org/10.1145/3517804.3524140 ( reposiTUm)
Gottlob, G., Lanzinger, M., Okulmus, C., & Pichler, R. (2022). Fast Parallel Hypertree Decompositions in Logarithmic Recursion Depth. In Proceedings of the 41st ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems (pp. 325–336). Association for Computing Machinery. https://doi.org/10.1145/3517804.3524153 ( reposiTUm)
Chen, H., Gottlob, G., Lanzinger, M., & Pichler, R. (2021). Semantic Width and the Fixed-Parameter Tractability of Constraint Satisfaction Problems. In Proceedings of the Twenty-Ninth International Joint Conference on Artificial Intelligence. IJCAI 2020, Yokohama, Japan. https://doi.org/10.24963/ijcai.2020/239 ( reposiTUm)
Gottlob, G., Okulmus, C., & Pichler, R. (2021). Fast and Parallel Decomposition of Constraint Satisfaction Problems. In Proceedings of the Twenty-Ninth International Joint Conference on Artificial Intelligence. IJCAI 2020, Yokohama, Japan. https://doi.org/10.24963/ijcai.2020/161 ( reposiTUm)
Gottlob, G., Lanzinger, M., Longo, D. M., Okulmus, C., & Pichler, R. (2020). The HyperTrac Project: Recent Progress and Future Research Directions on Hypergraph Decompositions. In Integration of Constraint Programming, Artificial Intelligence, and Operations Research (pp. 3–21). Springer. https://doi.org/10.1007/978-3-030-58942-4_1 ( reposiTUm)
Gottlob, G., Lanzinger, M., Pichler, R., & Razgon, I. (2020). Fractional Covers of Hypergraphs with BoundedMulti-Intersection. In 45th International Symposium on Mathematical Foundations of Computer Science August 24-28, 2020, Prague (Czech Republic) (pp. 1–14). https://doi.org/10.4230/LIPIcs.MFCS.2020.41 ( reposiTUm)
Lanzinger, M., Gottlob, G., & Pichler, R. (2019). Fixed-Parameter Tractable Fragments Of Conjunctive Queries And Constraint Satisfaction Problems. In noch nicht bekannt (pp. 1–2). http://hdl.handle.net/20.500.12708/57793 ( reposiTUm)
Gottlob, G., Pichler, R., & Okulmus, C. (2019). Parallel Computation of Generalized Hypertree Decompositions. In Proceedings of the 13th Alberto Mendelzon International Workshop on Foundations of Data Management, Asunci{’{o}}n, Paraguay, June 3-7, 2019 (pp. 1–5). CEUR-WS.org. http://hdl.handle.net/20.500.12708/57860 ( reposiTUm)
Bertossi, L., Gottlob, G., & Pichler, R. (2019). Datalog: Bag Semantics via Set Semantics. In P. Barcelo & M. Calutti (Eds.), 22nd International Conference on Database Theory, {ICDT} 2019 (pp. 16:1-16:19). Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik. https://doi.org/10.4230/LIPIcs.ICDT.2019.16 ( reposiTUm)
Fischl, W., Longo, D. M., Gottlob, G., & Pichler, R. (2019). HyperBench. In Proceedings of the 38th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems - PODS ’19. SIGMOD/PODS 2019 - 38th Symposium on Principles of Database Systems 2019, Amsterdam, Netherlands (the). ACM. https://doi.org/10.1145/3294052.3319683 ( reposiTUm)
Gottlob, G., Lanzinger, M., & Pichler, R. (2019). Semantic Width Revisited (Extended Abstract). In Proceedings of the 13th Alberto Mendelzon International Workshop on Foundations of Data Management, Asunci{’{o}}n, Paraguay, June 3-7, 2019 (pp. 1–5). CEUR-WS.org. http://hdl.handle.net/20.500.12708/55515 ( reposiTUm)
Fischl, W., Gottlob, G., Longo, D. M., & Pichler, R. (2019). HyperBench: {A} Benchmark and Tool for Hypergraphs and Empirical Findings. In Proceedings of the 13th Alberto Mendelzon International Workshop on Foundations of Data Management, Asunci{’{o}}n, Paraguay, June 3-7, 2019.}, (pp. 1–5). CEUR-WS.org. http://hdl.handle.net/20.500.12708/55517 ( reposiTUm)
Csar, T., Lackner, M., & Pichler, R. (2018). Computing the Schulze Method for Large-Scale Preference Data Sets. In Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence. IJCAI - International Joint Conference on Artificial Intelligence, Stockholm, Sweden. ijcai.org. https://doi.org/10.24963/ijcai.2018/25 ( reposiTUm)
Fischl, W., Gottlob, G., & Pichler, R. (2018). General and Fractional Hypertree Decompositions: Hard and Easy Cases. In Proceedings of the 37th {ACM} {SIGMOD-SIGACT-SIGAI} Symposium on Principles of Database Systems (pp. 17–32). ACM. https://doi.org/10.1145/3196959.3196962 ( reposiTUm)
Fischl, W., Gottlob, G., & Pichler, R. (2018). General and Fractional Hypertree Decompositions: Hard and Easy Cases (extended abstract). In Proceedings of the 12th Alberto Mendelzon International Workshop on Foundations of Data Management (pp. 1–4). {CEUR} Workshop Proceedings. http://hdl.handle.net/20.500.12708/55500 ( reposiTUm)
Csar, T., Lackner, M., Pichler, R., & Sallinger, E. (2017). Computational Social Choice in the Clouds. In Workshop Präferenzen und Personalisierung in der Informatik bei der Konferenz “Datenbanksysteme für Business, Technologie und Web” (BTW) (pp. 163–167). http://hdl.handle.net/20.500.12708/57077 ( reposiTUm)
Creignou, N., Kröll, M., Pichler, R., Skritek, S., & Vollmer, H. (2017). On the Complexity of Hard Enumeration Problems. In Language and Automata Theory and Applications - 11th International Conference, LATA 2017 (pp. 183–195). http://hdl.handle.net/20.500.12708/57056 ( reposiTUm)
Kröll, M., Pichler, R., & Woltran, S. (2017). On the Complexity of Enumerating the Extensions of Abstract Argumentation Frameworks. In Proceedings of the Twenty-Sixth International Joint Conference on Artificial Intelligence. 26th International Joint Conference on Artificial Intelligence (IJCAI 2017), Melbourne, Australia. https://doi.org/10.24963/ijcai.2017/159 ( reposiTUm)
Csar, T., Lackner, M., Pichler, R., & Sallinger, E. (2017). Winner Determination in Huge Elections with MapReduce. AAAI 2017: 451-458. In AAAI 2017 (pp. 451–458). http://hdl.handle.net/20.500.12708/57076 ( reposiTUm)
Gottlob, G., Pichler, R., & Sallinger, E. (2017). Function Symbols in Tuple-Generating Dependencies: Expressive Power and Computability. In E. Sallinger (Ed.), 11th Alberto Mendelzon International Workshop on Foundations of Data Management and the Web, AMW 2017 (pp. 1–5). CEUR Workshop Proceedings / CEUR-WS.org. http://hdl.handle.net/20.500.12708/57055 ( reposiTUm)
Ahmetaj, S., Fischl, W., Kröll, M., Pichler, R., Šimkus, M., & Skritek, S. (2016). The Challenge of Optional Matching in SPARQL. In M. Gyssens & G. R. Simari (Eds.), Foundations of Information and Knowledge Systems 9th International Symposium, FoIKS 2016, Linz, Austria, March 7-11, 2016. Proceedings (pp. 169–190). Lecture Notes in Computer Science (LNCS) / Springer. https://doi.org/10.1007/978-3-319-30024-5_10 ( reposiTUm)
Kröll, M., Pichler, R., & Skritek, S. (2016). On the Complexity of Enumerating the Answers to Well-designed Pattern Trees. In W. Martens & T. Zeume (Eds.), 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016 (pp. 22:1-22:18). Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik. https://doi.org/10.4230/LIPIcs.ICDT.2016.22 ( reposiTUm)
Kolaitis, P. G., Pichler, R., Sallinger, E., & Savenkov, V. (2016). Limits of Schema Mappings. In W. Martens & T. Zeume (Eds.), 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016 (pp. 19:1-19:17). Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik. https://doi.org/10.4230/LIPIcs.ICDT.2016.19 ( reposiTUm)
Arming, S., Pichler, R., & Sallinger, E. (2016). Complexity of Repair Checking and Consistent Query Answering. In W. Martens & T. Zeume (Eds.), 19th International Conference on Database Theory, ICDT 2016, Bordeaux, France, March 15-18, 2016 (pp. 21:1-21:18). Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik. https://doi.org/10.4230/LIPIcs.ICDT.2016.21 ( reposiTUm)
Kröll, M., Pichler, R., & Skritek, S. (2016). On the Complexity of Enumerating the Answers to Well-Designed Pattern Trees. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 5). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56490 ( reposiTUm)
Arenas, M., Gottlob, G., & Pieris, A. (2016). A Datalog-Based Language for Querying RDF Graphs. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 4). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56548 ( reposiTUm)
Barceló, P., Gottlob, G., & Pieris, A. (2016). Semantic Acyclicity Under Constraints. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 5). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56547 ( reposiTUm)
Csar, T., Lackner, M., Pichler, R., & Sallinger, E. (2016). Winner Determination in Huge Elections with MapReduce. In M. Endres, N. Mattei, & A. Pfandler (Eds.), 10th Multidisciplinary Workshop on Advances in Preference Handling (p. 7). http://hdl.handle.net/20.500.12708/56661 ( reposiTUm)
Ahmetaj, S., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Polynomial Datalog Rewritings for Ontology Mediated Queries with Closed Predicates. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 5). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56671 ( reposiTUm)
Ngo, N., Ortiz de la Fuente, M. M., & Simkus, M. (2016). Closed Predicates in Description Logics: Results on Combined Complexity. In R. Pichler & A. S. da Silva (Eds.), Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016 (p. 5). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56672 ( reposiTUm)
Ahmetaj, S., Fischl, W., Pichler, R., Šimkus, M., & Skritek, S. (2015). Towards Reconciling SPARQL and Certain Answers. In A. Gangemi, L. Stefano, & A. Panconesi (Eds.), Proceedings of the 24th International Conference on World Wide Web. ACM. https://doi.org/10.1145/2736277.2741636 ( reposiTUm)
Ahmetaj, S., Fischl, W., Pichler, R., Simkus, M., & Skritek, S. (2015). DL-Lite and Conjunctive Queries Extended by Optional Matching. In D. Calvanese & B. Konev (Eds.), Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015 (p. 4). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56094 ( reposiTUm)
Csar, T., Pichler, R., Sallinger, E., & Savenkov, V. (2015). Using Statistics for Computing Joins with MapReduce. In A. Cali & M.-E. Vidal (Eds.), Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015 (p. 6). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56102 ( reposiTUm)
Barceló, P., Pichler, R., & Skritek, S. (2015). Efficient Evaluation of Well-designed Pattern Trees (Extended Abstract). In A. Cali & M.-E. Vidal (Eds.), Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015 (p. 6). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56095 ( reposiTUm)
Ahmetaj, S., Fischl, W., Pichler, R., Simkus, M., & Skritek, S. (2015). Towards Reconciling SPARQL and Certain Answers (Extended Abstract). In A. Cali & M.-E. Vidal (Eds.), Proceedings of the 9th Alberto Mendelzon International Workshop on Foundations of Data Management, Lima, Peru, May 6 - 8, 2015 (p. 6). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/56096 ( reposiTUm)
Barcelo, P., Pichler, R., & Skritek, S. (2015). Efficient Evaluation and Approximation of Well-designed Pattern Trees. In T. Milo & D. Calvanese (Eds.), Proceedings of the 34th ACM SIGMOD-SIGACT-SIGAI  Symposium on Principles of Database Systems. ACM. https://doi.org/10.1145/2745754.2745767 ( reposiTUm)
Gottlob, G., Pichler, R., & Sallinger, E. (2015). Function Symbols in Tuple-Generating Dependencies. In T. Milo & D. Calvanese (Eds.), Proceedings of the 34th ACM SIGMOD-SIGACT-SIGAI  Symposium on Principles of Database Systems. ACM. https://doi.org/10.1145/2745754.2745756 ( reposiTUm)
Kronegger, M., Lackner, M., Pfandler, A., & Pichler, R. (2014). A Parameterized Complexity Analysis of Generalized CP-Nets. In M. R. Fellows, S. Gaspers, & T. Walsh (Eds.), Proceedings of the 2nd Workshop on the Parameterized Complexity of Computational Reasoning (PCCR) (p. 2). http://hdl.handle.net/20.500.12708/55773 ( reposiTUm)
Arming, S., Pichler, R., & Sallinger, E. (2014). Combined Complexity of Repair Checking and Consistent Query Answering. In G. Gottlob & J. Perez (Eds.), Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management, Cartagena de Indias, Colombia, June 4-6, 2014 (p. 6). CEUR. http://hdl.handle.net/20.500.12708/55791 ( reposiTUm)
Calvanese, D., Fischl, W., Pichler, R., Sallinger, E., & Simkus, M. (2014). Expressive Identification Constraints to Capture Functional Dependencies in Description Logics. In Informal Proceedings of the 27th International Workshop on Description Logics (DL 2014) (p. 5). CEUR-WS. http://hdl.handle.net/20.500.12708/55903 ( reposiTUm)
Kolaitis, P. G., Pichler, R., Sallinger, E., & Savenkov, V. (2014). Nested dependencies: structure and reasoning. In R. Hull & M. Grohe (Eds.), Proceedings of the 33rd ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, PODS’14, Snowbird, UT, USA, June 22-27, 2014 (pp. 176–187). ACM. http://hdl.handle.net/20.500.12708/58804 ( reposiTUm)
Pichler, R. (2014). Certain Answers to Well-Designed SPARQL Queries. In Dagstuhl Reports 4(8) (pp. 15–16). http://hdl.handle.net/20.500.12708/55369 ( reposiTUm)
Pichler, R., & Skritek, S. (2014). On the Hardness of Counting the Solutions of SPARQL Queries. In G. Gottlob & J. Perez (Eds.), Proceedings of the 8th Alberto Mendelzon Workshop on Foundations of Data Management (p. 6). CEUR-WS. http://hdl.handle.net/20.500.12708/55783 ( reposiTUm)
Calvanese, D., Fischl, W., Pichler, R., Sallinger, E., & Simkus, M. (2014). Capturing Relational Schemas and Functional Dependencies in RDFS. In Proceedings of the Twenty-Eighth AAAI Conference on Aritifical Intelligence (pp. 1003–1011). http://hdl.handle.net/20.500.12708/55901 ( reposiTUm)
Kronegger, M., Lackner, M., Pfandler, A., & Pichler, R. (2014). A Parameterized Complexity Analysis of Generalized CP-Nets. In C. E. Brodley & P. Stone (Eds.), Proceedings of the Twenty-Eighth AAAI Conference on Aritifical Intelligence (pp. 1091–1097). http://hdl.handle.net/20.500.12708/55793 ( reposiTUm)
Pichler, R., & Skritek, S. (2014). Containment and equivalence of well-designed SPARQL. In R. Hull & M. Grohe (Eds.), Proceedings of the 33rd ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems. ACM. https://doi.org/10.1145/2594538.2594542 ( reposiTUm)
Creignou, N., Pichler, R., & Woltran, S. (2013). Do Hard SAT-Related Reasoning Tasks Become Easier in the Krom Fragment? In F. Rossi (Ed.), Proceedings of the 23rd International Joint Conference on Artificial Intelligence (pp. 954–961). AAAI Press. http://hdl.handle.net/20.500.12708/54860 ( reposiTUm)
Kronegger, M., Pfandler, A., & Pichler, R. (2013). Conformant Planning as a Benchmark for QBF-Solvers. In International Workshop on Quantified Boolean Formulas (QBF 2013) (p. 5). http://hdl.handle.net/20.500.12708/54793 ( reposiTUm)
Savenkov, V., Pichler, R., & Koch, C. (2013). Loop Elimination for Database Updates. In G. Gottlob, G. Grasso, D. Olteanu, & C. Schallhart (Eds.), Big Data (pp. 48–61). Springer. https://doi.org/10.1007/978-3-642-39467-6_8 ( reposiTUm)
Guagliardo, P., Pichler, R., & Sallinger, E. (2013). Enhancing the Updatability of Projective Views. In Proceedings of the 7th Alberto Mendelzon International Workshop on Foundations of Data Management (p. 7). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/54848 ( reposiTUm)
Bliem, B., Pichler, R., & Woltran, S. (2013). Declarative Dynamic Programming as an Alternative Realization of Courcelle’s Theorem. In G. Gutin & S. Szeider (Eds.), Parameterized and Exact Computation (pp. 28–40). Springer. https://doi.org/10.1007/978-3-319-03898-8_4 ( reposiTUm)
Gottlob, G., Lanzinger, M. P., Longo, D. M., Okulmus, C., Pichler, R., & Selzer, A. (2013). Reaching Back to Move Forward: Using Old Ideas to Achieve a New Level of Query Optimization. In B. Kimelfeld, M. V. Martinez, & R. Angles (Eds.), Proceedings of the 15th Alberto Mendelzon International Workshop on Foundations of Data Management (AMW 2023). CEUR-WS.org. https://doi.org/10.34726/5396 ( reposiTUm)
Hubmer, A., Pichler, R., Savenkov, V., & Skritek, S. (2013). Efficient Updates of Uncertain Databases. In L. Bravo & M. Lenzerini (Eds.), Proceedings of the 7th Alberto Mendelzon International Workshop on Foundations of Data Management Puebla/Cholula, Mexico, May 21-23, 2013 (p. 7). CEUR-WS. http://hdl.handle.net/20.500.12708/54797 ( reposiTUm)
Kronegger, M., Pfandler, A., & Pichler, R. (2013). Parameterized Complexity of Optimal Planning: A Detailed Map. In F. Rossi (Ed.), Proceedings of the Twenty-Third International Joint Conference on Artificial Intelligence (pp. 954–961). AAAI Press. http://hdl.handle.net/20.500.12708/54787 ( reposiTUm)
Kronegger, M., Lackner, M., Pfandler, A., & Pichler, R. (2013). A Parameterized Complexity Analysis of Generalized CP-Nets. In 7th Multidisciplinary Workshop on Advances in Preference Handling (p. 7). http://hdl.handle.net/20.500.12708/54788 ( reposiTUm)
Ali, M. I., Pichler, R., Truong, H.-L., & Dustdar, S. (2012). Incorporating Data Concerns into Query Languages for Data Services. In R. Zhang, J. Zhang, Z. Zhang, J. Filipe, & J. Cordeiro (Eds.), Enterprise Information Systems (pp. 132–145). Springer. https://doi.org/10.1007/978-3-642-29958-2_9 ( reposiTUm)
Morak, M., Musliu, N., Pichler, R., Rümmele, S., & Woltran, S. (2012). Evaluating Tree-Decomposition Based Algorithms for Answer Set Programming. In Y. Hamadi & M. Schoenauer (Eds.), Learning and Intelligent Optimization (pp. 130–144). Springer. https://doi.org/10.1007/978-3-642-34413-8_10 ( reposiTUm)
Lackner, M., Pichler, R., Rümmele, S., & Woltran, S. (2012). Multicut on Graphs of Bounded Clique-Width. In G. Lin (Ed.), Combinatorial Optimization and Applications (pp. 115–126). Springer. https://doi.org/10.1007/978-3-642-31770-5_11 ( reposiTUm)
Letelier, A., Perez, J., Pichler, R., & Skritek, S. (2012). SPAM: A SPARQL Analysis and Manipulation Tool. In Z. M. Özsoyoglu (Ed.), Proceedings of the VLDB (pp. 1958–1961). http://hdl.handle.net/20.500.12708/54495 ( reposiTUm)
Creignou, N., Papini, O., Pichler, R., & Woltran, S. (2012). Belief Revision within Fragments of Propositional Logic. In G. Brewka, T. Eiter, & S. McIlraith (Eds.), Proceedings of 13#^{th} int. conf. on Principles of Knowledge Representation and Reasoning (p. 11). AAAI Press. http://hdl.handle.net/20.500.12708/54154 ( reposiTUm)
Letelier, A., Pérez, J., Pichler, R., & Skritek, S. (2012). Static analysis and optimization of semantic web queries. In M. Benedikt, M. Krötzsch, & M. Lenzerini (Eds.), Proceedings of the 31st symposium on Principles of Database Systems - PODS ’12. ACM. https://doi.org/10.1145/2213556.2213572 ( reposiTUm)
Perez, J., Pichler, R., Sallinger, E., & Savenkov, V. (2012). Union and Intersection of Schema Mappings. In J. Freire & D. Suciu (Eds.), Proceedings of the 6th Alberto Mendelzon International Workshop on Foundations of Data Management (p. 13). CEUR-WS.org. http://hdl.handle.net/20.500.12708/54149 ( reposiTUm)
Morak, M., Musliu, N., Pichler, R., Rümmele, S., & Woltran, S. (2011). A New Tree-Decomposition Based Algorithm for Answer Set Programming. In T. M. Khoshgoftaar & X. Zhu (Eds.), 2011 IEEE 23rd International Conference on Tools with Artificial Intelligence. https://doi.org/10.1109/ictai.2011.154 ( reposiTUm)
Pichler, R., & Skritek, S. (2011). Tractable Counting of the Answers to Conjunctive Queries. In P. Barceló & V. Tannen (Eds.), Alberto Mendelzon International Workshop on Foundations of Data Management 2011 (p. 12). CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/53692 ( reposiTUm)
Feinerer, I., Pichler, R., Sallinger, E., & Savenkov, V. (2011). On the Undecidability of the Equivalence of Second-Order Tuple Generating Dependencies. In P. Barceló & V. Tannen (Eds.), Alberto Mendelzon International Workshop on Foundations of Data Management 2011 (p. 13). http://hdl.handle.net/20.500.12708/53693 ( reposiTUm)
Ali, M. I., Pichler, R., Truong, H.-L., & Dustdar, S. (2011). On Integrating Data Services Using Data Mashups. In A. A. A. Fernandes, A. J. G. Gray, & K. Belhajjame (Eds.), Advances in Databases: 28th British National Conference on Databases, BNCOD 28 (pp. 132–135). LNCS/Springer. https://doi.org/10.1007/978-3-642-24577-0_14 ( reposiTUm)
Pichler, R., & Skritek, S. (2011). The Complexity of Evaluating Tuple Generating Dependencies. In T. Milo (Ed.), Proceedings of the 14#^{th} International Conference on Database Theory (p. 12). ACM. http://hdl.handle.net/20.500.12708/53675 ( reposiTUm)
Pichler, R., Sallinger, E., & Savenkov, V. (2011). Relaxed Notions of Schema Mapping Equivalence Revisited. In T. Milo (Ed.), Proceedings of the 14th International Conference Database Theory (p. 12). ACM. http://hdl.handle.net/20.500.12708/53674 ( reposiTUm)
Ali, M. I., Pichler, R., Truong, H.-L., & Dustdar, S. (2011). Data Concern Aware Querying for the Integration of Data Services. In J. Cordeiro, X. Li, Z. Zhang, & J. Zhang (Eds.), Proceedings of the 13#^{th} International Conference on Enterprise Information Systems (pp. 111–119). SciTePress. http://hdl.handle.net/20.500.12708/53892 ( reposiTUm)
Sallinger, E., Pichler, R., & Savenkov, V. (2010). Schema Mapping Optimization in the Presence of Target Constraints. In H. Kaiser & R. Kirner (Eds.), Proceedings of the Junior Scientist Conference 2010 (pp. 309–310). http://hdl.handle.net/20.500.12708/53423 ( reposiTUm)
Pfandler, A., Pichler, R., & Woltran, S. (2010). Decentralized Diagnosis: Complexity Analysis and Datalog Encodings. In H. Kaiser & R. Kirner (Eds.), Proceedings of the Junior Scientist Conference 2010 (pp. 291–292). http://hdl.handle.net/20.500.12708/53424 ( reposiTUm)
Pichler, R., Polleres, A., Skritek, S., & Woltran, S. (2010). Minimising RDF Graphs under Rules and Constraints Revisited. In A. H. F. Laender & L. V. S. Lakshmanan (Eds.), Proceedings of the 4th Alberto Mendelzon International Workshop on Foundations of Data Management. CEUR Workshop Proceedings. http://hdl.handle.net/20.500.12708/53438 ( reposiTUm)
Pichler, R., & Woltran, S. (2010). The Complexity of Handling Minimal Solutions in Logic-Based Abduction. In H. Coelho, R. Studer, & M. Woolridge (Eds.), Prooceedings of ECAI 2010 - 19th European Conference on Artificial Intelligence (pp. 895–900). IOS Press. http://hdl.handle.net/20.500.12708/53439 ( reposiTUm)
Pichler, R., Polleres, A., Skritek, S., & Woltran, S. (2010). Redundancy Elimination on RDF Graphs in the Presence of Rules, Constraints, and Queries. In P. Hitzler & T. Lukasiewicz (Eds.), Web Reasoning and Rule Systems (pp. 133–148). Lecture Notes/ Springer. https://doi.org/10.1007/978-3-642-15918-3_11 ( reposiTUm)
Pichler, R., Rümmele, S., & Woltran, S. (2010). Multicut Algorithms via Tree Decompositions. In T. Calamoneri & J. Diaz (Eds.), Algorithms and Complexity : 7th International Conference, CIAC 2010, Rome, Italy, May 26-28, 2010, Proceedings (pp. 167–179). LNCS, Springer. https://doi.org/10.1007/978-3-642-13073-1_16 ( reposiTUm)
Skritek, S., & Pichler, R. (2010). Implementing a Peer Database Management System. In H. Kaiser & R. Kirner (Eds.), Proceedings of the Junior Scientist Conference 2010 (pp. 299–300). http://hdl.handle.net/20.500.12708/53422 ( reposiTUm)
Morak, M., Pichler, R., Rümmele, S., & Woltran, S. (2010). A Dynamic-Programming Based ASP-Solver. In R. Goebel, J. Siekmann, & W. Wahlster (Eds.), Logics in Artificial Intelligence (pp. 369–372). Springer. https://doi.org/10.1007/978-3-642-15675-5_34 ( reposiTUm)
Pichler, R., Savenkov, V., Skritek, S., & Truong, H.-L. (2010). Uncertain Databases in Collaborative Data Management. In A. de Keijzer & M. van Keulen (Eds.), CTIT Workshop Proceedings Series (pp. 129–143). CTIT, Centre for Telematics and Information Technology. http://hdl.handle.net/20.500.12708/53505 ( reposiTUm)
Pichler, R., Rümmele, S., Szeider, S., & Woltran, S. (2010). Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth Is not Enough. In F. Lin, U. Sattler, & M. Truszczynski (Eds.), Proc. of KR 2010 (p. 10). AAAI Press. http://hdl.handle.net/20.500.12708/53171 ( reposiTUm)
Dvorak, W., Pichler, R., & Woltran, S. (2010). Towards Fixed-Parameter Tractable Algorithms for Argumentation. In F. Lin, U. Sattler, & M. Truszczynski (Eds.), Proc. of KR 2010 (p. 11). AAAI Press. http://hdl.handle.net/20.500.12708/53170 ( reposiTUm)
Pichler, R., Rümmele, S., & Woltran, S. (2010). Counting and Enumeration Problems with Bounded Treewidth. In R. Goebel, J. Siekmann, & W. Wahlster (Eds.), Logic for Programming, Artificial Intelligence, and Reasoning (pp. 387–404). Lecture Notes in Computer Science. https://doi.org/10.1007/978-3-642-17511-4_22 ( reposiTUm)
Pichler, R., Rümmele, S., & Woltran, S. (2009). Belief Revision with Bounded Treewidth. In E. Erdem, F. Lin, & T. Schaub (Eds.), Logic Programming and Nonmonotonic Reasoning: 10th International Conference, LPNMR 2009, Potsdam, Germany, September 14-18, 2009, Proceedings (pp. 250–263). Springer. https://doi.org/10.1007/978-3-642-04238-6_22 ( reposiTUm)
Pichler, R., & Savenkov, V. (2009). DEMo: Data Exchange Modeling Tool. In H. V. Jagadish (Ed.), Proceedings of the 35#^{th}Int. Conf. on Very Large Data Bases (p. 4). http://hdl.handle.net/20.500.12708/52812 ( reposiTUm)
Dvořák, W., Gottlob, G., Pichler, R., & Woltran, S. (2009). Alternation as a programming paradigm. In A. Porto & F. J. Lopez-Fraguas (Eds.), Proceedings of the 11th ACM SIGPLAN conference on Principles and practice of declarative programming - PPDP ’09. ACM Press. https://doi.org/10.1145/1599410.1599419 ( reposiTUm)
Gottlob, G., Pichler, R., & Savenkov, V. (2009). Normalization and Optimization of Schema Mappings. In H. V. Jagadish (Ed.), Proceedings of the 35#^{th}Int. Conf. on Very Large Data Bases (p. 12). VLDB Endowment. http://hdl.handle.net/20.500.12708/52806 ( reposiTUm)
Ali, M. I., Pichler, R., Truong, H.-L., & Dustdar, S. (2009). DeXIN: An Extensible Framework for Distributed XQuery over Heterogeneous Data Sources. In J. Filipe & J. Cordeiro (Eds.), Enterprise Information Systems Proceedings of the 11th International Conference, ICEIS 2009 (pp. 172–183). Springer. http://hdl.handle.net/20.500.12708/52681 ( reposiTUm)
Ali, M. I., Pichler, R., Truong, H.-L., & Dustdar, S. (2009). On Using Distributed Extended XQuery for Web Data Sources as Services. In M. Gaedke, M. Grossniklaus, & O. Díaz (Eds.), Web Engineering, 9th International Conference, ICWE 2009 San Sebastián, Spain, June 24-26 2009 Proceedings (pp. 497–500). Springer. https://doi.org/10.1007/978-3-642-02818-2_47 ( reposiTUm)
Jakl, M., Pichler, R., & Woltran, S. (2009). Answer-Set Programming with Bounded Tree Width. In C. Boutilier (Ed.), Proc. of the Twenty-First Int. Joint Conference on Artificial Intelligence (pp. 816–822). AAAI Press. http://hdl.handle.net/20.500.12708/52743 ( reposiTUm)
Herman, M., & Pichler, R. (2008). Counting Complexity of Minimal Cardinality and Minimal Weight Abduction. In S. Hölldobler, C. Lutz, & H. Wansing (Eds.), Logics in Artificial Intelligence (pp. 206–218). http://hdl.handle.net/20.500.12708/52292 ( reposiTUm)
Pichler, R., Polleres, A., Wei, F., & Woltran, S. (2008). dRDF: Entailment for Domain-Restricted RDF. In The Semantic Web: Research and Applications (pp. 200–214). Springer LNCS. https://doi.org/10.1007/978-3-540-68234-9_17 ( reposiTUm)
Hermann, M., & Pichler, R. (2008). Complexity of Counting the Optimal Solutions. In X. Hu & J. Wang (Eds.), Computing and Combinatorics: 14th International Conference, COCOON 2008 Dalian, China, June 27-29, 2008, Proceedings (pp. 149–159). Lecture Notes of Computer Science, Springer. https://doi.org/10.1007/978-3-540-69733-6_16 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2008). Abduction with Bounded Treewidth: From Theoretical Tractability to Practically Efficient Computation. In A. Cohn & D. M. Hamilton (Eds.), AAAI-08/IAAI-08 Proceedings (pp. 1541–1547). AAAI Press. http://hdl.handle.net/20.500.12708/52641 ( reposiTUm)
Savenkov, V., & Pichler, R. (2008). Towards Practical Feasibility of Core Computation in Data Exchange. In I. Cervesato, H. Veith, & A. Voronkov (Eds.), Logic for Programming, Artificial Intelligence, and Reasoning (pp. 62–78). Springer. http://hdl.handle.net/20.500.12708/52365 ( reposiTUm)
Jakl, M., Pichler, R., Rümmele, S., & Woltran, S. (2008). Fast Counting with Bounded Treewidth. In I. Cervesato, H. Veith, & A. Voronkov (Eds.), Logic for Programming, Artificial Intelligence, and Reasoning (pp. 436–450). Springer. http://hdl.handle.net/20.500.12708/52425 ( reposiTUm)
Bry, F., Eisinger, N., Eiter, T., Furche, T., Gottlob, G., Ley, C., Linse, B., Pichler, R., & Wei, F. (2007). Foundations of Rule-Based Query. In Reasoning Web (pp. 1–153). Lecture Notes in Computer Science. http://hdl.handle.net/20.500.12708/51850 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2007). Monadic Datalog over Finite Structures with Bounded Treewidth. In P. G. Kolaitis (Ed.), Proceedings of the Twenty-Sixth ACM SIGMOD-SIGACT-SIGART -Symposium on Principles of Database Systems (PODS 2007) (pp. 165–174). ACM. http://hdl.handle.net/20.500.12708/51822 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2007). Efficient Datalog Abduction through Bounded Treewidth. In Proceedings of the Twenty-Second AAAI Conference on Artificial Intelligence (p. 6). AAAI Press. http://hdl.handle.net/20.500.12708/51837 ( reposiTUm)
Hermann, M., & Pichler, R. (2007). Counting Complexity of Propositional Abduction. In Proceeding of the Twentieth International Joint Conference on Artificial Intelligence (pp. 417–422). AAAI Press. http://hdl.handle.net/20.500.12708/51772 ( reposiTUm)
Fink, M., Pichler, R., Tompits, H., & Woltran, S. (2007). Complexity of Rule Redundancy in Non-Ground Answer-Set Programming over Finite Domains. In C. Baral, G. Brewka, & J. Schlipf (Eds.), Proceedings of the 9th International Conference on Logic Programming and Nonmonotonic Reasoning (LPNMR 2007) (pp. 123–135). Springer. http://hdl.handle.net/20.500.12708/51780 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2006). Tractable Database Design through Bounded Treewidth. In Proceedings of the Twenty-Fifth ACM SIGMOND-SIGACT-SIGART Symposium on Principles of Database Systems (pp. 124–133). ACM Press. http://hdl.handle.net/20.500.12708/51363 ( reposiTUm)
Fermüller, C., & Pichler, R. (2006). Model Representation via Contexts and Implicit Generalizations. In Logics in Artificial Intelligence (LNAI) (pp. 164–176). Springer-Verlag. http://hdl.handle.net/20.500.12708/51419 ( reposiTUm)
Pichler, R. (2006). Algorithmic Aspectc of Model Representations. In M. Fink, H. Tompits, & S. Woltran (Eds.), 20th Workshop on Logic Programming (WLP2006) (pp. 12–20). INFSYS Research Report. http://hdl.handle.net/20.500.12708/51472 ( reposiTUm)
Gottlob, G., Pichler, R., & Wei, F. (2006). Bounded Treewidth as a Key to Tractability of Knowledge Representation and Reasoning. In Proceeding of the Twenty-First National Conference on Artificial Intelligence (pp. 250–256). The AAAI Press. http://hdl.handle.net/20.500.12708/51474 ( reposiTUm)
Fermüller, C., & Pichler, R. (2005). Model Representation via Contexts and Implicit Generalizations. In Automated Deduction - CADE-20 (pp. 409–423). Springer Science + Business Media. http://hdl.handle.net/20.500.12708/51026 ( reposiTUm)

Tagungsbände

Böhlen, M., Pichler, R., May, N., Rahm, E., Wu, S.-H., & Hose, K. (Eds.). (2018). Advances in Database Technology — EDBT 2018. EDBT 2018. https://doi.org/10.5441/002/edbt.2018.01 ( reposiTUm)
Pichler, R., & da Silva, A. S. (Eds.). (2016). Proceedings of the 10th Alberto Mendelzon International Workshop on Foundations of Data Management, Panama City, Panama, May 8-10, 2016. CEUR-WS.org. http://hdl.handle.net/20.500.12708/24225 ( reposiTUm)

Präsentationen

Kimmelfeld, B., Pichler, R., Kolaitis, P. G., & Skritek, S. (2020). Enumerating the Repairs of Inconsistent Databases. WEPA 2020 - 4th International Workshop on Enumeration Problems and Applications, online, Haifa, Israel. http://hdl.handle.net/20.500.12708/87117 ( reposiTUm)
Fischl, W., Calvanese, D., Pichler, R., Simkus, M., & Sallinger, E. (2014). Capturing Relational Schemas and Functional Dependencies in RDFS. Reasoning Web, International Summer School 2014, Athens, Greece. http://hdl.handle.net/20.500.12708/85949 ( reposiTUm)
Kronegger, M., Lackner, M., Pfandler, A., & Pichler, R. (2014). On the Parameterized Complexity of Generalized CP-Nets. Workshop on Challenges in Algorithmic Social Choice (CASC), Bad Belzig, Germany. http://hdl.handle.net/20.500.12708/85939 ( reposiTUm)
Bliem, B., Pichler, R., & Woltran, S. (2013). Applicability of ASP-based Problem Solving on Tree Decompositions. Third International Workshop on Graph Structures for Knowledge Representation and Reasoning (GKR) 2013, Peking, China. http://hdl.handle.net/20.500.12708/85667 ( reposiTUm)
Pichler, R. (2013). Coping with High Complexity: Structure Matters. The 32nd INTERNATIONAL CONFERENCE OF THE CHILEAN COMPUTER SOCIETY (SCCC), Temuco, Chile. http://hdl.handle.net/20.500.12708/85923 ( reposiTUm)

Berichte

Dvorak, W., Pichler, R., & Woltran, S. (2011). Towards Fixed-Parameter Tractable Algorithms for Abstract Argumentation (DBAI-TR-2011-74). http://hdl.handle.net/20.500.12708/37126 ( reposiTUm)
Morak, M., Musliu, N., Pichler, R., Rümmele, S., & Woltran, S. (2011). Evaluating Tree-Decomposition Based Algorithms for Answer Set Programming (DBAI-TR-2011-73). http://hdl.handle.net/20.500.12708/37104 ( reposiTUm)
Dvorak, W., Gottlob, G., Pichler, R., & Woltran, S. (2009). Alternation as a Programming Paradigm (DBAI-TR-2009-64). http://hdl.handle.net/20.500.12708/35631 ( reposiTUm)
Pichler, R., Polleres, A., Wei, F., & Woltran, S. (2008). dRDF: Entailment for Domain-Restricted RDF (DBAI-TR-2008-59). http://hdl.handle.net/20.500.12708/35162 ( reposiTUm)
Jakl, M., Pichler, R., Rümmele, S., & Woltran, S. (2008). Fast Counting with Bounded Treewidth (DBAI-TR-2008-61). http://hdl.handle.net/20.500.12708/35325 ( reposiTUm)
Egly, U., Pichler, R., & Woltran, S. (2003). On Deciding Subsumption Problems. http://hdl.handle.net/20.500.12708/32928 ( reposiTUm)

Preprints

Gottlob, G., Lanzinger, M., Pichler, R., & Razgon, I. (2020). Complexity Analysis of General and Fractional Hypertree Decompositions (p. 54). arXiv. https://doi.org/10.48550/arXiv.2002.05239 ( reposiTUm)
Pichler, R., Rümmele, S., Szeider, S., & Woltran, S. (2012). Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth is not Enough. CoRR - Computing Research Repository. https://doi.org/10.48550/arXiv.1204.3040 ( reposiTUm)

Hochschulschriften

Pichler, R. (2000). H-Subsumption in automated deduction [Dissertation, Technische Universität Wien]. reposiTUm. http://hdl.handle.net/20.500.12708/183933 ( reposiTUm)