Gallai colorings and domination in multipartite digraphs

Gallai colorings and domination in multipartite digraphs
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加莱着色和多部分有向图中的支配

DOI:
10.1002/jgt.20646
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发表时间:
2010
影响因子:
0.9
通讯作者:
Á. Tóth
Á. Tóth
中科院分区:
数学3区
文献类型:
--
作者:
A. Gyárfás;G. Simonyi;Á. Tóth

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假设D是一个没有循环三角形的有向图,它的顶点被划分为独立顶点的A1,…,At类。如果对于任意顶点存在w∈U使得(w, v)∈E(D),则称为规模为|S|的支配集。设β(D)是顶点来自D的不同部类的D的最大独立集的基性。我们的主要结果表明,存在h = h(β(D))使得D有一个最大为h的支配集。这个结果应用于解决一个与广义Gallai着色有关的问题,无3色三角形图的边着色。©2011 Wiley期刊公司J图论
Assume that D is a digraph without cyclic triangles and its vertices are partitioned into classes A1, …, At of independent vertices. A set is called a dominating set of size |S| if for any vertex there is a w∈U such that (w, v)∈E(D). Let β(D) be the cardinality of the largest independent set of D whose vertices are from different partite classes of D. Our main result says that there exists a h = h(β(D)) such that D has a dominating set of size at most h. This result is applied to settle a problem related to generalized Gallai colorings, edge colorings of graphs without 3‐colored triangles. © 2011 Wiley Periodicals, Inc. J Graph Theory
DOI: --
发表时间: 1984
期刊: --
影响因子: --
作者:
M. Wodzicki
通讯作者: M. Wodzicki