English

Holes and a chordal cut in a graph

Combinatorics 2011-03-23 v1

Abstract

A set XX of vertices of a graph GG is called a {\em clique cut} of GG if the subgraph of GG induced by XX is a complete graph and the number of connected components of GXG-X is greater than that of GG. A clique cut XX of GG is called a {\em chordal cut} of GG if there exists a union UU of connected components of GXG-X such that G[UX]G[U \cup X] is a chordal graph. In this paper, we consider the following problem: Given a graph GG, does the graph have a chordal cut? We show that K2,2,2K_{2,2,2}-free hole-edge-disjoint graphs have chordal cuts if they satisfy a certain condition.

Keywords

Cite

@article{arxiv.1103.4341,
  title  = {Holes and a chordal cut in a graph},
  author = {Suh-Ryung Kim and Jung Yeun Lee and Yoshio Sano},
  journal= {arXiv preprint arXiv:1103.4341},
  year   = {2011}
}

Comments

12 pages, 1 figure