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» Constraint Symmetry and Solution Symmetry
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CP
2005
Springer
13 years 10 months ago
Weak Symmetries in Problem Formulations
Abstract. In this article we will present some problems that have weak symmetries. In contrast to a proper symmetry, a weak symmetry acts only on a subset of the variables and pres...
Roland Martin, Karsten Weihe
CP
2007
Springer
13 years 11 months ago
Constraint Symmetry for the Soft CSP
We introduce a definition of constraint symmetry for soft CSPs, based on the definition of constraint symmetry for classical CSPs. We show that the constraint symmetry group of a...
Barbara M. Smith, Stefano Bistarelli, Barry O'Sull...
COCOA
2008
Springer
13 years 6 months ago
Automatic Generation of Symmetry-Breaking Constraints
Solution symmetries in integer linear programs often yield long Branch-and-Bound based solution processes. We propose a method for finding elements of the permutation group of sol...
Leo Liberti
CP
2005
Springer
13 years 10 months ago
Conditional Symmetry Breaking
Conditional symmetry arises in a sub-problem of a constraint satisfaction problem, where the sub-problem satisfies some condition under which additional symetries hold. Typically...
Ian P. Gent, Tom Kelsey, Steve Linton, Iain McDona...
AIPS
2003
13 years 6 months ago
Symmetry Reduction for SAT Representations of Transition Systems
Symmetries are inherent in systems that consist of several interchangeable objects or components. When reasoning about such systems, big computational savings can be obtained if t...
Jussi Rintanen