Graph operations characterizing rank-width and balanced graph expressions

  • Authors:
  • Bruno Courcelle;Mamadou Moustapha Kanté

  • Affiliations:
  • LaBRI, Université Bordeaux 1, CNRS, Talence Cedex, France;LaBRI, Université Bordeaux 1, CNRS, Talence Cedex, France

  • Venue:
  • WG'07 Proceedings of the 33rd international conference on Graph-theoretic concepts in computer science
  • Year:
  • 2007

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Abstract

Graph complexity measures like tree-width, clique-width, NLC-width and rank-width are important because they yield Fixed Parameter Tractable algorithms. Rank-width is based on ranks of adjacency matrices of graphs over GF(2). We propose here algebraic operations on graphs that characterize rank-width. For algorithmic purposes, it is important to represent graphs by balanced terms. We give a unique theorem that generalizes several "balancing theorems" for tree-width and clique-width. New results are obtained for rank-width and a variant of clique-width, called m-clique-width.