Total colorings of planar graphs without intersecting 5-cycles

  • Authors:
  • Bing Wang;Jian-Liang Wu

  • Affiliations:
  • Department of Mathematics, Zaozhuang University, Shandong, 277160, China and School of Mathematics, Shandong University, Jinan, 250100, China;School of Mathematics, Shandong University, Jinan, 250100, China

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2012

Quantified Score

Hi-index 0.05

Visualization

Abstract

A total k-coloring of a graph G is a coloring of V(G)@?E(G) using k colors such that no two adjacent or incident elements receive the same color. The total chromatic number of G is the smallest integer k such that G has a total k-coloring. In this paper, it is proved that if G is a planar graph with maximum degree @D=7 and without intersecting 5-cycles, that is, every vertex is incident with at most one cycle of length 5, then the total chromatic number of G is @D+1.