arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1602.03590math.CO
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图中匹配的谱特征

Spectral characterization of matchings in graphs

Keivan Hassani Monfared, Sudipta Mallik

摘要:

给出了图的匹配数(最大匹配的大小)的谱刻画。更精确地说,它表明,图G的阶n的匹配数是k正是那些图的最大斜秩为2k,使任何给定的一组k个不同的非零纯虚数有一个真正的斜对称矩阵A与图G的频谱由给定的k个数字,其共轭对,和n-2k个零。

英文摘要:

A spectral characterization of the matching number (the size of a maximum matching) of a graph is given. More precisely, it is shown that the graphs G of order n whose matching number is k are precisely those graphs with the maximum skew rank 2k such that for any given set of k distinct nonzero purely imaginary numbers there is a real skew-symmetric matrix A with graph G whose spectrum consists of the given k numbers, their conjugate pairs, and n-2k zeros.

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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