arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.00438math.CO
收藏

保证彩虹匹配的匹配大小的改进界

An improved bound on the sizes of matchings guaranteeing a rainbow matching

Dennis Clemens, Julia Ehrenmüller

摘要:

Aharoni和Berger的一个猜想指出,在一个二部多重图中,每一个尺寸为$n+1$的$n$匹配族都包含一个尺寸为$n$的彩虹匹配。在本文中,我们证明了匹配的大小$(3/2 + o(1)) n$足以保证这样的彩虹匹配,这是渐近相同的情况下,我们只希望找到一个彩虹匹配的大小$n-1$已知的最好的。这改进了Aharoni,Charbit和Howard以及Kotlar和Ziv之前的结果。

英文摘要:

A conjecture by Aharoni and Berger states that every family of $n$ matchings of size $n+1$ in a bipartite multigraph contains a rainbow matching of size $n$. In this paper we prove that matching sizes of $(3/2 + o(1)) n$ suffice to guarantee such a rainbow matching, which is asymptotically the same bound as the best known one in case we only aim to find a rainbow matching of size $n-1$. This improves previous results by Aharoni, Charbit and Howard, and Kotlar and Ziv.

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。

↑