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关于3-点临界图的一个猜想的证明

A conjecture on 3-vertex-critical graphs
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摘要 设γ(G)是图G的点控制数.如果对任意的v∈V(G),都有γ(Gv)<γ(G)成立,那么称G为γ-点临界图.本文主要给出Ananchuen和Plummer提出的一个猜想的证明,得到了如下的结果:若G是无K1,7的3-点临界图,且阶数为不小于18的偶数,则除几类特殊图外,G均有完美匹配. Let γ(G) be the domination number of a graph G. A graph G is γ-vertex-critical if γ(G- v) 〈 γ(G) for every vertex v C V(G). In this paper, we show that if G is a 3-vertex-critical graph of even order n ≥18 and K1,7-free, then G contains a perfect matching with some exceptions. Our result solves a conjecture proposed by Ananchuen and Plummer.
出处 《中国科学:数学》 CSCD 北大核心 2013年第5期519-527,共9页 Scientia Sinica:Mathematica
基金 国家自然科学基金(批准号:10990011和11171097)资助项目
关键词 点控制数 3-点临界图 完美匹配 domination number, 3-vertex-critical, perfect matching
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  • 1WANG Tao1&YU QingLin2 1Institute of Applied Mathematics,College of Mathematics and Information Science,Henan University,Kaifeng 475001,China,2Department of Mathematics and Statistics,Thompson Rivers University,Kamloops,BC V2C5N3,Canada.A conjecture on k-factor-critical and 3-γ-critical graphs[J].Science China Mathematics,2010,53(5):348-354. 被引量:2
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