On the number of minimal separators in graphs

On the number of minimal separators in graphs
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关于图中最小分隔符的数量

DOI:
10.1002/jgt.22179
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发表时间:
2015
影响因子:
0.9
通讯作者:
Simon Mackenzie
Simon Mackenzie
中科院分区:
数学3区
文献类型:
--
作者:
Serge Gaspers;Simon Mackenzie

文献摘要

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我们考虑了一个n阶图所能具有的最大极小分离子数。- 给出了这个数在O 1 + 52 n·n中的一个新的证明。证明了该数在ω(1.4457n)中,改进了Ω(3 n/3)<$ω(1.4422n)的最佳下界,并给出了图中潜在极大团数的一个改进下界.我们要强调的是,我们的证明是简短、简单和基本的。
Weconsider the largest number of minimal separators a graph on n vertices can have. –We give a new proof that this number is in O1+52n·n . –We prove that this number is in ω(1.4457n) , improving on the previous best lower bound of Ω(3n/3)⊆ω(1.4422n) .This gives also an improved lower bound on the number of potential maximal cliques in a graph. We would like to emphasize that our proofs are short, simple, and elementary.