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» Parameterized Modal Satisfiability
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ICALP
2010
Springer
13 years 7 months ago
Parameterized Modal Satisfiability
We investigate the parameterized computational complexity of the satisfiability problem for modal logic and attempt to pinpoint relevant structural parameters which cause the probl...
Antonis Achilleos, Michael Lampis, Valia Mitsou
AISC
1998
Springer
13 years 9 months ago
Optimising Propositional Modal Satisfiability for Description Logic Subsumption
Effective optimisation techniques can make a dramatic difference in the performance of knowledge representation systems based on expressive description logics. Because of the corre...
Ian Horrocks, Peter F. Patel-Schneider
CORR
2008
Springer
113views Education» more  CORR 2008»
13 years 5 months ago
Generalized Modal Satisfiability
It is well-known that modal satisfiability is PSPACE-complete [Lad77]. However, the complexity may decrease if we restrict the set of propositional operators used. Note that there ...
Edith Hemaspaandra, Henning Schnoor, Ilka Schnoor
AAAI
2008
13 years 7 months ago
Phase Transitions and Complexity of Weighted Satisfiability and Other Intractable Parameterized Problems
The study of random instances of NP complete and coNP complete problems has had much impact on our understanding of the nature of hard problems. In this work, we initiate an effor...
Yong Gao
CORR
2006
Springer
130views Education» more  CORR 2006»
13 years 5 months ago
Characterizing the NP-PSPACE Gap in the Satisfiability Problem for Modal Logic
There has been a great deal of work on characterizing the complexity of the satisfiability and validity problem for modal logics. In particular, Ladner showed that the consistency...
Joseph Y. Halpern, Leandro Chaves Rêgo