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arXiv 1912.03421math.CO
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稀疏重图的亏损DP-染色

Defective DP-colorings of sparse multigraphs

Yifan Jing, Alexandr Kostochka, Fuhong Ma, Pongpat Sittitrai, Jingwei Xu

摘要:

DP-着色(也称为对应着色)是Dvorak和Postle最近发展的列表着色的推广。引入并研究了多重图的$(i,j)$ -亏损DP-染色。本文主要研究稀疏重图,并考虑了$f_{DP}(i,j,n)$ --具有$n$ -顶点$(i,j)$ -临界重图的最小边数,即没有$(i,j)$ -亏损DP-染色但其每个真子图都有这样的DP-染色的重图$G$.对于每一个$i$和$j$,我们发现线性下界$f_{DP}(i,j,n)$是精确的无限多个$n$。

英文摘要:

DP-coloring (also known as correspondence coloring) is a generalization of list coloring developed recently by Dvorak and Postle. We introduce and study $(i,j)$-defective DP-colorings of multigraphs. We concentrate on sparse multigraphs and consider $f_{DP}(i,j,n)$ --- the minimum number of edges that may have an $n$-vertex $(i,j)$-critical multigraph, that is, a multigraph $G$ that has no $(i,j)$-defective DP-coloring but whose every proper subgraph has such a coloring. For every $i$ and $j$, we find linear lower bounds on $f_{DP}(i,j,n)$ that are exact for infinitely many $n$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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