论文标题

循环和集团的方向拉姆齐阈值

Orientation Ramsey thresholds for cycles and cliques

论文作者

Barros, Gabriel Ferreira, Cavalar, Bruno Pasqualotto, Kohayakawa, Yoshiharu, Naia, Tássio

论文摘要

如果$ g $是一个图形,而$ \ vec h $是面向的图形,我们将$ g \ to \ vec h $写成,以说$ g $的每个方向都包含$ \ vec h $作为一个子图。我们考虑$ g = g(n,p)$,二项式随机图的情况。我们确定属性$ g(n,p)\(n,p)\ to \ vec h $的阈值$ p _ {\ vec h} = p _ {\ vec h}(n)$,对于$ \ vec h $是完整图或周期的acyclicatientation的情况。

If $G$ is a graph and $\vec H$ is an oriented graph, we write $G\to \vec H$ to say that every orientation of the edges of $G$ contains $\vec H$ as a subdigraph. We consider the case in which $G=G(n,p)$, the binomial random graph. We determine the threshold $p_{\vec H}=p_{\vec H}(n)$ for the property $G(n,p)\to \vec H$ for the cases in which $\vec H$ is an acyclic orientation of a complete graph or of a cycle.

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