Equitable Coloring and Equitable Choosability of Graphs with Small Maximum Average Degree

A graph is said to be equitably k-colorable if the vertex set V (G) can be partitioned into k independent subsets V1, V2, . . . , Vk such that ||Vi|−|Vj || ≤ 1 (1 ≤ i, j ≤ k). A graph G is equitably k-choosable if, for any given k-uniform list assignment L, G is L-colorable and each color appears on...

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Bibliographic Details
Main Authors: Dong Aijun, Zhang Xin
Format: Article
Language:English
Published: Sciendo 2018-08-01
Series:Discussiones Mathematicae Graph Theory
Subjects:
Online Access:http://www.degruyter.com/view/j/dmgt.2018.38.issue-3/dmgt.2049/dmgt.2049.xml?format=INT
Description
Summary:A graph is said to be equitably k-colorable if the vertex set V (G) can be partitioned into k independent subsets V1, V2, . . . , Vk such that ||Vi|−|Vj || ≤ 1 (1 ≤ i, j ≤ k). A graph G is equitably k-choosable if, for any given k-uniform list assignment L, G is L-colorable and each color appears on at most ⌈|V(G)|k⌉$\left\lceil {{{\left| {V(G)} \right|} \over k}} \right\rceil$ vertices. In this paper, we prove that if G is a graph such that mad(G) < 3, then G is equitably k-colorable and equitably k- choosable where k ≥ max{Δ(G), 4}. Moreover, if G is a graph such that 125${{12} \over 5}$ , then G is equitably k-colorable and equitably k-choosable where k ≥ max{Δ (G), 3}.
ISSN:2083-5892