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arXiv 1303.3166cs.CC
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证明一个图是Ramsey的复杂性

The complexity of proving that a graph is Ramsey

Massimo Lauria, Pavel Pudlák, Vojtěch Rödl, Neil Thapen

摘要:

我们称一个具有$n$顶点的图是$c$ -Ramsey图,如果它既不包含团,也不包含大小为$c \log n$的独立集.我们定义了一个CNF公式来表示图$G$的这个属性。对每个图$G$,给出了$G$是$c$ -Ramsey的分解证明长度的一个超多项式下界.我们的证明利用了这样一个事实,即每一个拉姆齐图必须包含一个大型的子图的一些统计特性的随机图。

英文摘要:

We say that a graph with $n$ vertices is $c$-Ramsey if it does not contain either a clique or an independent set of size $c \log n$. We define a CNF formula which expresses this property for a graph $G$. We show a superpolynomial lower bound on the length of resolution proofs that $G$ is $c$-Ramsey, for every graph $G$. Our proof makes use of the fact that every Ramsey graph must contain a large subgraph with some of the statistical properties of the random graph.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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