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LICS
2010
IEEE
13 years 8 months ago
Fixed-Point Definability and Polynomial Time on Graphs with Excluded Minors
We prove that fixed-point logic with counting captures polynomial time on all classes of graphs with excluded minors. That is, for every class C of graphs such that some graph H is...
Martin Grohe
CADE
2007
Springer
14 years 10 months ago
Combining Deduction and Algebraic Constraints for Hybrid System Analysis
We show how theorem proving and methods for handling real algebraic constraints can be combined for hybrid system verification. In particular, we highlight the interaction of deduc...
André Platzer
CADE
2001
Springer
14 years 10 months ago
Incremental Closure of Free Variable Tableaux
Abstract. This paper presents a technique for automated theorem proving with free variable tableaux that does not require backtracking. Most existing automated proof procedures usi...
Martin Giese
PODS
2005
ACM
118views Database» more  PODS 2005»
14 years 10 months ago
On the complexity of division and set joins in the relational algebra
We show that any expression of the relational division operator in the relational algebra with union, difference, projection, selection, constant-tagging, and joins, must produce ...
Dirk Leinders, Jan Van den Bussche
FOSSACS
2010
Springer
14 years 5 months ago
Coalgebraic Correspondence Theory
Abstract. We lay the foundations of a first-order correspondence theory for coalgebraic logics that makes the transition structure explicit in the first-order modelling. In parti...
Lutz Schröder, Dirk Pattinson