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LICS
2008
IEEE
14 years 2 months ago
Caterpillar Duality for Constraint Satisfaction Problems
The study of constraint satisfaction problems definable in various fragments of Datalog has recently gained considerable importance. We consider constraint satisfaction problems ...
Catarina Carvalho, Víctor Dalmau, Andrei A....
FSTTCS
1993
Springer
14 years 17 days ago
Higher-Order and Semantic Unification
Abstract. We provide a complete system of transformation rules for semantic unification with respect to theories defined by convergent rewrite systems. We show that this standard u...
Nachum Dershowitz, Subrata Mitra
ISSAC
1992
Springer
114views Mathematics» more  ISSAC 1992»
14 years 16 days ago
Parallel Lattice Basis Reduction
Abstract. Lattice basis reduction is an important problem in geometry of numbers with applications in combinatorial optimization, computer algebra, and cryptography. The well-known...
Gilles Villard
STACS
2010
Springer
14 years 12 days ago
The Complexity of the List Homomorphism Problem for Graphs
We completely characterise the computational complexity of the list homomorphism problem for graphs in combinatorial and algebraic terms: for every graph H the problem is either N...
László Egri, Andrei A. Krokhin, Beno...
NIPS
2007
13 years 10 months ago
Non-parametric Modeling of Partially Ranked Data
Statistical models on full and partial rankings of n items are often of limited practical use for large n due to computational consideration. We explore the use of non-parametric ...
Guy Lebanon, Yi Mao