Browsing by Author/Editor/Contributor HELLINGS, Jelle

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Showing results 1 to 17 of 17
Issue DateTitleAuthor(s)TypeCat.
2023Expressive Completeness of Two-Variable First-Order Logic with Counting for First-Order Logic Queries on Rooted Unranked TreesHELLINGS, Jelle ; GYSSENS, Marc ; VAN DEN BUSSCHE, Jan ; Van Gucht, DirkProceedings PaperC1
2022Optimizing Multiset Relational Algebra Queries Using Weak-Equivalent Rewrite RulesHELLINGS, Jelle ; Wu , Yuqing; Van Gucht, Dirk; GYSSENS, Marc Proceedings PaperC1
2022The power of Tarski's relation algebra on treesHELLINGS, Jelle ; Van Gucht, Dirk; GYSSENS, Marc ; WU, YuqingJournal ContributionA1
2021From Relation Algebra to Semi-join Algebra: An Approach to Graph Query OptimizationHELLINGS, Jelle ; Pilachowski, CL; Van Gucht, D; GYSSENS, Marc ; Wu, YQJournal ContributionA1
2020Comparing the expressiveness of downward fragments of the relation algebra with transitive closure on treesHELLINGS, Jelle ; GYSSENS, Marc ; Wu, Yuqing; Van Gucht, Dirk; VAN DEN BUSSCHE, Jan ; VANSUMMEREN, Stijn ; Fletcher, George H. L.Journal ContributionA1
2019First-order definable counting-only queriesHELLINGS, Jelle ; GYSSENS, Marc ; Van Gucht, Dirk; Wu, YuqingJournal ContributionA1
2019Calculi for symmetric queriesGYSSENS, Marc ; HELLINGS, Jelle ; Paredaens, Jan; Van Gucht, Dirk; Wijsen, Jef; Wu, YuqingJournal ContributionA1
2018First-order definable counting-only queriesHELLINGS, Jelle ; GYSSENS, Marc ; Van Gucht, Dirk; Wu, YuqingProceedings PaperC1
2018The Power of Tarski’s Relation Algebra on TreesHELLINGS, Jelle ; Wu, Yuqing; GYSSENS, Marc ; Van Gucht, DirkProceedings PaperC1
2018On Tarski’s Relation Algebra: Querying trees and chains, and the semi-join algebraHELLINGS, Jelle Theses and DissertationsT1
2017From Relation Algebra to Semi-Join Algebra: An Approach for Graph Query OptimizationHELLINGS, Jelle ; Pilachowski, Catherine L.; Van Gucht, Dirk; GYSSENS, Marc ; Wu, YuqingProceedings PaperC1
2016Implication and axiomatization of functional and constant constraintsHELLINGS, Jelle ; GYSSENS, Marc ; Paredaens, Jan; Wu, YuqingJournal ContributionA1
2015Relative expressive power of downward fragments of navigational query languages on trees and chainsHELLINGS, Jelle ; GYSSENS, Marc ; Wu, Yuqing; Van Gucht, Dirk; VAN DEN BUSSCHE, Jan ; VANSUMMEREN, Stijn ; Fletcher, George H. L.Proceedings PaperC1
2014Implication and Axiomatization of Functional Constraints on Patterns with an Application to the RDF Data ModelHELLINGS, Jelle ; GYSSENS, Marc ; Paredaens, Jan; Wu, YuqingProceedings PaperC1
2014Conjunctive Context-Free Path QueriesHELLINGS, Jelle Proceedings PaperC1
2013Walk logic as a framework for path query languages on graph databasesHELLINGS, Jelle ; KUIJPERS, Bart ; VAN DEN BUSSCHE, Jan ; ZHANG, Xiaowang Proceedings PaperC1
2012Efficient External-Memory Bisimulation on DAGsHELLINGS, Jelle ; Fletcher, George H. L.; Haverkort, HermanProceedings PaperC1