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arXiv 1304.6901math.CO
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一致超图中的分数匹配与整数匹配

Fractional and integer matchings in uniform hypergraphs

Daniela Kühn, Deryk Osthus, Timothy Townsend

摘要:

我们的主要结果改进了Markstrom和Rucinski关于n阶k-一致超图的最小d-度的界,使得n阶k-一致超图中的最小d-度是完美匹配。通过渐近地确定n阶k-一致超图中匹配大小为t < n/2(k-1)的最小顶点度,推广了Bollobas,Daykin和Erdos的界.进一步渐近紧的结果,迫使大匹配的d度也得到了。我们的方法是证明上述结果的分数版本,然后将其转换为整数版本。

英文摘要:

Our main result improves bounds of Markstrom and Rucinski on the minimum d-degree which forces a perfect matching in a k-uniform hypergraph on n vertices. We also extend bounds of Bollobas, Daykin and Erdos by asymptotically determining the minimum vertex degree which forces a matching of size t < n/2(k-1) in a k-uniform hypergraph on n vertices. Further asymptotically tight results on d-degrees which force large matchings are also obtained. Our approach is to prove fractional versions of the above results and then translate these into integer versions.

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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