EQUITABLE LIST COLORING OF GRAPHS
EQUITABLE LIST COLORING OF GRAPHS
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DOI:
10.11650/tjm.8.2004.1088
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发表时间:
2004-01
影响因子:
0.4
通讯作者:
Weifan Wang;Ko-Wei Lih
中科院分区:
文献类型:
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作者:
Weifan Wang;Ko-Wei Lih
A graph $G$ is equitably $k$-choosable if, for any $k$-uniform list assignment $L$, $G$ admits a proper coloring $\pi$ such that $\pi(v)\in L(v)$ for all $v\in V(G)$ and each color appears on at most $\lceil |G|/k\rceil$ vertices. It was conjectured in [8] that every graph $G$ with maximum degree $\Delta$ is equitably $k$-choosable whenever $k\ge \Delta+1$. We prove the conjecture for the following cases: (i) $\Delta \le 3$; (ii) $k\ge (\Delta-1)^2$. Moreover, equitably 2-choosable graphs are completely characterized.