Maximal infinite-valued constraint languages

  • Authors:
  • Manuel Bodirsky;Hubie Chen;Jan Kára;Timo von Oertzen

  • Affiliations:
  • LIX, École Polytechnique, Greater Paris, France;Departament de Tecnologies de la Informació i les Comunicacions, Universitat Pompeu Fabra, Barcelona, Spain;Department of Applied Mathematics, Charles University, Prague, Czech Republic;Max-Planck-Institute for Human Development, Berlin, Germany

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2009

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Abstract

We systematically investigate the computational complexity of constraint satisfaction problems for constraint languages over an infinite domain. In particular, we study a generalization of the well-established notion of maximal constraint languages from finite to infinite domains. If the constraint language can be defined with an @w-categorical structure, then maximal constraint languages are in one-to-one correspondence to minimal oligomorphic clones. Based on this correspondence, we derive general tractability and hardness criteria for the corresponding constraint satisfaction problems.