Polynomial-time perfect matchings in dense hypergraphs
Polynomial-time perfect matchings in dense hypergraphs
复制标题
稠密超图中的多项式时间完美匹配
DOI:
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发表时间:
2013
期刊:
影响因子:
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通讯作者:
Richard Mycroft
中科院分区:
文献类型:
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作者:
Peter Keevash;Fiachra Knox;Richard Mycroft
Let H be a k-graph on n vertices, with minimum codegree at least n/k + cn for some fixed c > 0. In this paper we construct a polynomial-time algorithm which finds either a perfect matching in H or a certificate that none exists. This essentially solves a problem of Karpinski, Rucinski and Szymanska, who previously showed that this problem is NP-hard for a minimum codegree of n/k - cn. Our algorithm relies on a theoretical result of independent interest, in which we characterise any such hypergraph with no perfect matching using a family of lattice-based constructions.
影响因子:
1.1
作者:
D. Kühn;Deryk Osthus
通讯作者:
D. Kühn;Deryk Osthus