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arXiv 1909.05342math.COmath.GR
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有向与无向阿贝尔凯莱图上的警察与强盗问题

Cops and robbers on directed and undirected abelian Cayley graphs

Peter Bradshaw, Seyyed Aliasghar Hosseini, Jérémie Turcotte

AI总结:

本文通过精细归纳法证明阿贝尔群上有向与无向凯莱图的警察数上界为$O(\sqrt{n})$,改进无向情形并首次建立有向情形上界,同时构造了警察数为$Θ(\sqrt{n})$的Meyniel极值族。

摘要:

我们通过引入一种精细的归纳方法,证明了阿贝尔群上有向和无向凯莱图的警察数具有形如$O(\sqrt{n})$的上界,其中$n$是顶点数。利用我们的方法,我们改进了阿贝尔群上无向凯莱图警察数的先前上界,并建立了阿贝尔群上有向凯莱图警察数的上界。我们还利用阿贝尔群上的凯莱图构造了新的\emph{Meyniel极值族},该族包含每个阶$n$且警察数为$Θ(\sqrt{n})$的图。

英文摘要:

We show that the cop number of directed and undirected Cayley graphs on abelian groups has an upper bound of the form of $O(\sqrt{n})$, where $n$ is the number of vertices, by introducing a refined inductive method. With our method, we improve the previous upper bound on cop number for undirected Cayley graphs on abelian groups, and we establish an upper bound on the cop number of directed Cayley graphs on abelian groups. We also use Cayley graphs on abelian groups to construct new \emph{Meyniel extremal families}, which contain graphs of every order $n$ with cop number $Θ(\sqrt{n})$.

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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