Compact labelings for efficient first-order model-checking

  • Authors:
  • Bruno Courcelle;Cyril Gavoille;Mamadou Moustapha Kanté

  • Affiliations:
  • LaBRI, CNRS, Université de Bordeaux, Talence, France 33405;LaBRI, CNRS, Université de Bordeaux, Talence, France 33405;LaBRI, CNRS, Université de Bordeaux, Talence, France 33405

  • Venue:
  • Journal of Combinatorial Optimization
  • Year:
  • 2011

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Abstract

We consider graph properties that can be checked from labels, i.e., bit sequences, of logarithmic length attached to vertices. We prove that there exists such a labeling for checking a first-order formula with free set variables in the graphs of every class that is nicely locally clique-width-decomposable. This notion generalizes that of a nicely locally tree-decomposable class. The graphs of such classes can be covered by graphs of bounded clique-width with limited overlaps. We also consider such labelings for bounded first-order formulas on graph classes of bounded expansion. Some of these results are extended to counting queries.