A variation on Heawood list-coloring for graphs on surfaces
Combinatorics
2013-05-22 v2
Abstract
We prove a variation on Heawood list-coloring for graphs on surfaces, modeled on Thomassen's planar 5-list-coloring theorem. For epsilon>0 define the Heawood number to be H(epsilon)=Floor((7+Sqrt[24*epsilon+1])/2). We prove that, except for epsilon=3, every graph embedded on a surface of Euler genus epsilon>0 with a distinguished face F can be list-colored when the vertices of F have (H(epsilon)-2)-lists and all other vertices have H(epsilon)-lists unless the induced subgraph on the vertices of F contains the complete graph on H(epsilon)-1 vertices.
Keywords
Cite
@article{arxiv.1302.7055,
title = {A variation on Heawood list-coloring for graphs on surfaces},
author = {Joan P. Hutchinson},
journal= {arXiv preprint arXiv:1302.7055},
year = {2013}
}
Comments
14 pages