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arXiv 0803.0864math.COmath.HO
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图中完美匹配数的一个上界

An upper bound for the number of perfect matchings in graphs

Shmuel Friedland

摘要:

本文给出了偶数阶无向单图$G$中完美匹配数的一个上界,它是由$G$中所有顶点的度决定的.如果$G$是完全二部图的并,则这个界是尖锐的.这个界是由$(0,1)$矩阵的持久式的Bregman-Minc不等式给出的$n+n$顶点上的二部图的完美匹配数的上界的推广.

英文摘要:

We give an upper bound on the number of perfect matchings in an undirected simple graph $G$ with an even number of vertices, in terms of the degrees of all the vertices in $G$. This bound is sharp if $G$ is a union of complete bipartite graphs. This bound is a generalization of the upper bound on the number of perfect matchings in bipartite graphs on $n+n$ vertices given by the Bregman-Minc inequality for the permanents of $(0,1)$ matrices.

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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