Non-uniform Boolean Constraint Satisfaction Problems with Cardinality Constraint

  • Authors:
  • Nadia Creignou;Henning Schnoor;Ilka Schnoor

  • Affiliations:
  • LIF (CNRS UMR 6166), Université d'Aix-Marseille, Marseille, France F-13288;Institut für Informatik, Christian-Albrechts-Universität Kiel, Kiel, Germany D-24098;Institut für Theoretische Informatik, Universität Lübeck, Lübeck, Germany D-23538

  • Venue:
  • CSL '08 Proceedings of the 22nd international workshop on Computer Science Logic
  • Year:
  • 2008

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Abstract

We study the computational complexity of Boolean constraint satisfaction problems with cardinality constraint. A Galois connection between clones and co-clones has received a lot of attention in the context of complexity considerations for constraint satisfaction problems. This connection fails when considering constraint satisfaction problems that support in addition a cardinality constraint. We prove that a similar Galois connection, involving a weaker closure operator and partial polymorphisms, can be applied to such problems. Thus, we establish dichotomies for the decision as well as for the counting problems in Schaefer's framework.