Elsevier

Theoretical Computer Science

Volume 796, 3 December 2019, Pages 196-206
Theoretical Computer Science

DP-degree colorable hypergraphs

https://doi.org/10.1016/j.tcs.2019.09.010Get rights and content
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Abstract

In order to solve a question on list coloring of planar graphs, Dvořák and Postle introduced the concept of so called DP-coloring, thereby extending the concept of list-coloring. DP-coloring was analyzed in detail by Bernshteyn, Kostochka, and Pron for graphs and multigraphs; they characterized DP-degree colorable multigraphs and deduced a Brooks' type result from this. The characterization of the corresponding ‘bad’ covers was later given by Kim and Ozeki. In this paper, the concept of DP-colorings is extended to hypergraphs having multiple (hyper-)edges. We characterize the DP-degree colorable hypergraphs and, furthermore, the corresponding ‘bad’ covers. This gives a Brooks' type result for the DP-chromatic number of a hypergraph.

Keywords

DP-coloring
Hypergraph coloring
Brooks' Theorem
List-coloring

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