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» GAC on Conjunctions of Constraints
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CP
2001
Springer
13 years 9 months ago
GAC on Conjunctions of Constraints
Abstract. Applying GAC on conjunctions of constraints can lead to more powerful pruning [1]. We show that there exists a simple heuristic for deciding which constraints might be us...
George Katsirelos, Fahiem Bacchus
CP
2009
Springer
14 years 5 months ago
Same-Relation Constraints
The ALLDIFFERENT constraint was one of the first global constraints [17] and it enforces the conjunction of one binary constraint, the not-equal constraint, for every pair of varia...
Christopher Jefferson, Karen E. Petrie, Meinolf Se...
CP
2007
Springer
13 years 11 months ago
A Compression Algorithm for Large Arity Extensional Constraints
We present an algorithm for compressing table constraints representing allowed or disallowed tuples. This type of constraint is used for example in configuration problems, where t...
George Katsirelos, Toby Walsh
CP
2007
Springer
13 years 11 months ago
GAC Via Unit Propagation
In this paper we argue that an attractive and potentially very general way of achieving generalized arc consistency (GAC) on a constraint is by using unit propagation (UP) over a C...
Fahiem Bacchus
CP
2006
Springer
13 years 8 months ago
Watched Literals for Constraint Propagation in Minion
Efficient constraint propagation is crucial to any constraint solver. We show that watched literals, already a great success in the satisfiability community, can be used to provide...
Ian P. Gent, Christopher Jefferson, Ian Miguel