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2011
12 years 10 months ago
On P/NP Dichotomies for EL Subsumption under Relational Constraints
Abstract. We consider the problem of characterising relational constraints under which TBox reasoning in EL is tractable. We obtain P vs. coNP-hardness dichotomies for tabular cons...
Agi Kurucz, Frank Wolter, Michael Zakharyaschev
DLOG
2011
12 years 10 months ago
The Complexity of Probabilistic EL
We analyze the complexity of subsumption in probabilistic variants of the description logic EL. In the case where probabilities apply only to concepts, we map out the borderline be...
Jean Christoph Jung, Víctor Gutiérre...
DLOG
2011
12 years 10 months ago
Unchain My EL Reasoner
We study a restriction of the classification procedure for EL++ where the inference rule for complex role inclusion axioms (RIAs) is applied in a “left-linear” way in analogy ...
Yevgeny Kazakov, Markus Krötzsch, Frantisek S...
TWC
2011
205views more  TWC 2011»
13 years 1 months ago
Quasi-Gray Labelling for Grassmannian Constellations
—This paper presents two polynomial-complexity techniques for assigning Gray-like binary labels to arbitrary Grassmannian constellations. In the first technique, the constellati...
Geoffrey W. K. Colman, Ramy H. Gohary, Mohamed A. ...