English

A relaxation of the Bordeaux Conjecture

Combinatorics 2015-04-07 v3

Abstract

A (c1,c2,...,ck)(c_1,c_2,...,c_k)-coloring of GG is a mapping φ:V(G){1,2,...,k}\varphi:V(G)\mapsto\{1,2,...,k\} such that for every i,1iki,1 \leq i \leq k, G[Vi]G[V_i] has maximum degree at most cic_i, where G[Vi]G[V_i] denotes the subgraph induced by the vertices colored ii. Borodin and Raspaud conjecture that every planar graph without intersecting triangles and 55-cycles is 33-colorable. We prove in this paper that every planar graph without intersecting triangles and 55-cycles is (2,0,0)-colorable.

Keywords

Cite

@article{arxiv.1407.5138,
  title  = {A relaxation of the Bordeaux Conjecture},
  author = {Runrun Liu and Xiangwen Li and Gexin Yu},
  journal= {arXiv preprint arXiv:1407.5138},
  year   = {2015}
}

Comments

The paper is accepted by European Journal of Combinatorics for publication