The Johansson-Molloy theorem for DP-coloring

被引:21
|
作者
Bernshteyn, Anton [1 ]
机构
[1] Univ Illinois, Dept Math, Champaign, IL 61820 USA
关键词
Graph coloring; list coloring; DP-coloring; triangle-free graphs; Local Lemma; entropy compression; GRAPHS;
D O I
10.1002/rsa.20811
中图分类号
TP31 [计算机软件];
学科分类号
081202 ; 0835 ;
摘要
The aim of this note is twofold. On the one hand, we present a streamlined version of Molloy's new proof of the bound chi(G)<=(1+o(1))Delta(G)/ln Delta(G) for triangle-free graphs G, avoiding the technicalities of the entropy compression method and only using the usual "lopsided" Lovasz Local Lemma (albeit in a somewhat unusual setting). On the other hand, we extend Molloy's result to DP-coloring (also known as correspondence coloring), a generalization of list coloring introduced recently by Dvorak and Postle.
引用
收藏
页码:653 / 664
页数:12
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