On a Hypergraph Matching Problem

On a Hypergraph Matching Problem
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关于超图匹配问题

DOI:
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发表时间:
2005
期刊:
Graphs Comb.
影响因子:
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通讯作者:
R. Yuster
R. Yuster
中科院分区:
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文献类型:
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作者:
N. Alon;R. Yuster

文献摘要

被引文献

相似文献

设H=(V,E)是r-一致超图,且H的匹配M是(α,)-完美的,如果对每个F∈,F的至少α|F|点被M覆盖。我们的主要结果是一个定理,给出了r-一致超图有-完美匹配的充分条件。作为我们定理的一个特例,我们得到了如下结果。设K(n,r)表示n个顶点的完全r-一致超图。设t和r是固定的正整数,其中t≥r≥2,则K(n,r)可以被K(t,r)的边不相交的副本所填充,使得每个顶点只与O(nr−1)条未打包的边关联。这推广了Rödl[9]的一个结果。
Let H = (V, E) be an r-uniform hypergraph and let A matching M of H is (α, )-perfect if for each F ∈ , at least α|F| vertices of F are covered by M. Our main result is a theorem giving sufficient conditions for an r-uniform hypergraph to have a -perfect matching. As a special case of our theorem we obtain the following result. Let K(n, r) denote the complete r-uniform hypergraph with n vertices. Let t and r be fixed positive integers where t≥r≥2. Then, K(n, r) can be packed with edge-disjoint copies of K(t, r) such that each vertex is incident with only o(nr−1) unpacked edges. This extends a result of Rödl [9].