arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1804.02802math.CO
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关于警匪博弈中1-可保图的一个注记

A note on 1-guardable graphs in the cops and robber game

Linyuan Lu, Zhiyu Wang

摘要:

在一个单图$G$上进行的警察和强盗博弈中,艾格纳和弗洛姆引理指出,一个警察可以守卫一条最短路径,因为强盗不能进入这条路径而不被抓住。本文将Aigner和Fromme引理推广到更大的图族,并给出了这类图的度量刻画。特别是,我们证明了块图的推广,即脊椎动物图,是1-guardable。利用这一结果,我们给出了一类特殊的多层广义Peterson图的copn数。

英文摘要:

In the cops and robber games played on a simple graph $G$, Aigner and Fromme's lemma states that one cop can guard a shortest path in the sense that the robber cannot enter this path without getting caught after finitely many steps. In this paper, we extend Aigner and Fromme's lemma to cover a larger family of graphs and give metric characterizations of these graphs. In particular, we show that a generalization of block graphs, namely vertebrate graphs, are 1-guardable. We use this result to give the cop number of some special class of multi-layer generalized Peterson graphs.

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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