Titlebook: Logics in Artificial Intelligence; 13th European Confer Luis Fariñas Cerro,Andreas Herzig,Jérôme Mengin Conference proceedings 2012 Springe

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Preferential Semantics for the Logic of Comparative Similarity over Triangular and Metric Modelsparison and similarity comparison within a modal language. The logic can express assertions of the kind “A is closer/more similar to B than to C” and has a natural application to spatial reasoning, as well as to reasoning about concept similarity in ontologies. The semantics of CSL is defined in ter

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Knowledge Means ‘,’, Belief Means ‘,’erpreted as truth in . (a ‘.’ of the) epistemically alternative states. This doxastic interpretation is of interest in KR applications and it also has an independent philosophical and technical interest. The logic . comprises an .4 epistemic modal operator, a doxastic modal operator of consistent an

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Deciding the Bisimilarity Relation between Datalog Goals-trees, considered as relational structures, are bisimilar. We address the problem of deciding whether two given goals are bisimilar with respect to given programs. When the given programs are hierarchical or restricted, this problem is decidable in 2EXPTIME.

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