Elsevier

Discrete Mathematics

Volume 327, 28 July 2014, Pages 29-35
Discrete Mathematics

Planar graphs with cycles of length neither 4 nor 7 are (3,0,0)-colorable

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Abstract

Let d1,d2,,dk be k non-negative integers. A graph G is (d1,d2,,dk)-colorable if the vertex set of G can be partitioned into subsets V1,V2,,Vk such that the subgraph G[Vi] induced by Vi has maximum degree at most di for 1ik. It is known that planar graphs with cycles of length neither 4 nor k, k{5,6}, are (3,0,0)-colorable. In this paper, we show that planar graphs with cycles of length neither 4 nor 7 are also (3,0,0)-colorable.

Keywords

Planar graph
Cycle
Improper coloring

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Supported by NSFC No. 11271335.