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ECML
2007
Springer
15 years 11 months ago
Conceptual Clustering Applied to Ontologies
Abstract. A clustering method is presented which can be applied to semantically annotated resources in the context of ontological knowledge bases. This method can be used to discov...
Floriana Esposito, Nicola Fanizzi, Claudia d'Amato
ESWS
2007
Springer
15 years 11 months ago
Minimal Deductive Systems for RDF
Abstract. This paper presents a minimalist program for RDF, by showing how one can do without several predicates and keywords of the RDF Schema vocabulary, obtaining a simpler lang...
Sergio Muñoz, Jorge Pérez, Claudio G...
ICALP
2007
Springer
15 years 11 months ago
Mechanism Design for Fractional Scheduling on Unrelated Machines
In this paper, we consider the mechanism design version of the fractional variant of the scheduling problem on unrelated machines. We give a lower bound of 2 − 1/n for any fracti...
George Christodoulou, Elias Koutsoupias, Annam&aac...
ICALP
2007
Springer
15 years 11 months ago
Complexity of Propositional Proofs Under a Promise
Abstract. We study – within the framework of propositional proof complexity – the problem of certifying unsatisfiability of CNF formulas under the promise that any satisfiabl...
Nachum Dershowitz, Iddo Tzameret
ICALP
2007
Springer
15 years 11 months ago
Parameterized Approximability of the Disjoint Cycle Problem
Abstract. We give an fpt approximation algorithm for the directed vertex disjoint cycle problem. Given a directed graph G with n vertices and a positive integer k, the algorithm co...
Martin Grohe, Magdalena Grüber
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