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:
影响因子:
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通讯作者:
R. Yuster
中科院分区:
文献类型:
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作者:
N. Alon;R. Yuster
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].