On the relationship between NLC-width and linear NLC-width

  • Authors:
  • Frank Gurski;Egon Wanke

  • Affiliations:
  • Heinrich-Heine-Universität Düsseldorf, Institute of Computer Science, Düsseldorf, Germany;Heinrich-Heine-Universität Düsseldorf, Institute of Computer Science, Düsseldorf, Germany

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2005

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Abstract

In this paper, we consider NLC-width, NLCT-width, and linear NLC-width bounded graphs. We show that the set of all complete binary trees has unbounded linear NLC-width and that the set of all co-graphs has unbounded NLCT-width. Since trees have NLCT-width 3 and co-graphs have NLC-width 1, it follows that the family of linear NLC-width bounded graph classes is a proper subfamily of the family of NLCT-width bounded graph classes and that the family of NLCT-width bounded graph classes is a proper subfamily of the family of NLC-width bounded graph classes.