Search Results for author: Bartosz Bednarczyk

Found 5 papers, 0 papers with code

Exploring Non-Regular Extensions of Propositional Dynamic Logic with Description-Logics Features

no code implementations19 Jul 2023 Bartosz Bednarczyk

Our primary objects of interest are ALCreg and ALCvpl, the extensions of with path expressions employing, respectively, regular and visibly-pushdown languages.

Lutz's Spoiler Technique Revisited: A Unified Approach to Worst-Case Optimal Entailment of Unions of Conjunctive Queries in Locally-Forward Description Logics

no code implementations12 Aug 2021 Bartosz Bednarczyk

We present a unified approach to (both finite and unrestricted) worst-case optimal entailment of (unions of) conjunctive queries (U)CQs in the wide class of "locally-forward" description logics.

The Price of Selfishness: Conjunctive Query Entailment for ALCSelf is 2ExpTime-hard

no code implementations29 Jun 2021 Bartosz Bednarczyk, Sebastian Rudolph

In logic-based knowledge representation, query answering has essentially replaced mere satisfiability checking as the inferencing problem of primary interest.

Satisfiability and Query Answering in Description Logics with Global and Local Cardinality Constraints

no code implementations14 Feb 2020 Franz Baader, Bartosz Bednarczyk, Sebastian Rudolph

On the other hand, the satisfiability problem becomes undecidable if inverse roles are added to the languages.

Statistical EL is ExpTime-complete

no code implementations2 Nov 2019 Bartosz Bednarczyk

We show that the consistency problem for Statistical EL ontologies, defined by Pe{\~{n}}aloza and Potyka, is ExpTime-hard.

Negation

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