Asymptotics of the Chromatic Index for Multigraphs
Asymptotics of the Chromatic Index for Multigraphs
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DOI:
10.1006/jctb.1996.0067
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发表时间:
1996-11
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影响因子:
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通讯作者:
J. Kahn
中科院分区:
文献类型:
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作者:
J. Kahn
For a multigraphG, letD(G) denote maximum degree and setformula]We show that the chromatic index??(G) is asymptotically max{D(G),Ggr;(G)}. The latter is, by a theorem of Edmonds (1965), the fractional chromatic index ofG, and the asymptotics established here are part of a conjecture of the author predicting similar agreement of fractional and ordinary chromatic indices for more general hypergraphs. Of particular interest in the present proof is the use of probabilistic ideas and “hard-core” distributions to go from fractional to ordinary (integer) colorings.