Coloring and the Lovász Local Lemma
Coloring and the Lovász Local Lemma
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DOI:
10.1016/j.aml.2009.02.008
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发表时间:
2010-03
期刊:
影响因子:
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通讯作者:
Xing Chen;Zhihua Du;J. Meng
中科院分区:
文献类型:
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作者:
Xing Chen;Zhihua Du;J. Meng
The Lovász Local Lemma yields sufficient conditions for a hypergraph to be 2-colorable, that is, to have a coloring of the points blue or red such that no edge is monochromatic. The method yields a general theorem, which shows for example, if H is a hypergraph in which each edge contains at least 9 points and each point is contained in at most 11 edges, then H is 2-colorable. In this paper, we use the ‘lopsided’ version of the Local Lemma to give some sufficient conditions on t-coloring to hypergraphs and 2-coloring to hypergraphs such that each edge contains at least 2 points of each color.