Groups and Constraints: Symmetry Breaking during Search

  • Ian P. Gent
  • Warwick Harvey
  • Tom Kelsey
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2470)


We present an interface between the ECLiPSe constraint logic programming system and the GAP computational abstract algebra system. The interface provides a method for efficiently dealing with large numbers of symmetries of constraint satisfaction problems for minimal programming effort. We also report an implementation of SBDS using the GAP-ECLiPSe interface which is capable of handling many more symmetries than previous implementations and provides improved search performance for symmetric constraint satisfaction problems.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Ian P. Gent
    • 1
  • Warwick Harvey
    • 2
  • Tom Kelsey
    • 1
  1. 1.School of Computer ScienceUniversity of St AndrewsFifeUK
  2. 2.IC-Parc Imperial CollegeLondonUK

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