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STACS
2007
Springer
13 years 10 months ago
Bounded-Variable Fragments of Hybrid Logics
Hybrid logics extend modal logics by first-order concepts, in particular they allow a limited use of variables. Unfortunately, in general, satisfiability for hybrid formulas is u...
Thomas Schwentick, Volker Weber
STACS
2007
Springer
13 years 10 months ago
Rank-1 Modal Logics Are Coalgebraic
Coalgebras provide a unifying semantic framework for a wide variety of modal logics. It has previously been shown that the class of
Lutz Schröder, Dirk Pattinson
STACS
2007
Springer
13 years 10 months ago
Enumerating All Solutions for Constraint Satisfaction Problems
We contribute to the study of efficient enumeration algorithms for all solutions of constraint satisfaction problems. The only algorithm known so far, presented by Creignou and H´...
Henning Schnoor, Ilka Schnoor
STACS
2007
Springer
13 years 10 months ago
A Calculus and Algebra for Distributed Data Management
Abstract. The sharing of content by communities of users (e.g., scientists) in a P2P context remains cumbersome. We argue that main reasons for this is the lack of calculus and alg...
Serge Abiteboul
STACS
2007
Springer
13 years 10 months ago
A New Rank Technique for Formula Size Lower Bounds
We exactly determine the formula size of the parity function. If n = 2 + k, where 0 ≤ k < 2 , then the formula size of parity on n bits is 2 (2 + 3k) = n2 + k2 − k2 . Khrap...
Troy Lee