Treelike comparability graphs

  • Authors:
  • Sabine Cornelsen;Gabriele Di Stefano

  • Affiliations:
  • Universität Konstanz, Fachbereich Informatik & Informationswissenschaft, Germany;Universití dell'Aquila, Dipartimento di Ingegneria Elettrica e dell'Informazione, Italy

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2009

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Abstract

An undirected graph is a treelike comparability graph if it admits a transitive orientation such that its transitive reduction is a tree. We show that treelike comparability graphs are distance hereditary. Utilizing this property, we give a linear time recognition algorithm. We then characterize permutation graphs that are treelike. Finally, we consider the Partitioning into Bounded Cliques problem on special subgraphs of treelike permutation graphs.