arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.05904math.COcs.DM
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几何图和可平面图上的局部化对策

Localization game on geometric and planar graphs

Bartłomiej Bosek, Przemysław Gordinowicz, Jarosław Grytczuk, Nicolas Nisse, Joanna Sokół, Małgorzata Śleszyńska-Nowak

摘要:

本文的主要议题是由蜂窝网络中的定位问题。给定一个图$G$,我们希望通过检查他到尽可能少的顶点的距离来定位行走代理。我们介绍的模型是基于一个追求图游戏,类似于著名的警察和强盗的游戏。它可以被认为是图的\emph{metric dimension}的博弈论变体。我们提供了上界的相关图不变$ζ(G)$,定义为本地化的强盗图$G$,几类图(树,二部图等)的最少数量的警察。我们的主要结果是,令人惊讶的是,存在树宽$2$和无界$ζ(G)$的可平面图。在积极的一面,我们证明了$ζ(G)$是有界的路径宽度的$G$。然后,我们表明,确定$ζ(G)$的算法问题是NP-困难的直径最多$2$的图。最后,我们表明,在最多一个警察可以近似(任意关闭)的位置强盗在欧几里得平面。

英文摘要:

The main topic of this paper is motivated by a localization problem in cellular networks. Given a graph $G$ we want to localize a walking agent by checking his distance to as few vertices as possible. The model we introduce is based on a pursuit graph game that resembles the famous Cops and Robbers game. It can be considered as a game theoretic variant of the \emph{metric dimension} of a graph. We provide upper bounds on the related graph invariant $ζ(G)$, defined as the least number of cops needed to localize the robber on a graph $G$, for several classes of graphs (trees, bipartite graphs, etc). Our main result is that, surprisingly, there exists planar graphs of treewidth $2$ and unbounded $ζ(G)$. On a positive side, we prove that $ζ(G)$ is bounded by the pathwidth of $G$. We then show that the algorithmic problem of determining $ζ(G)$ is NP-hard in graphs with diameter at most $2$. Finally, we show that at most one cop can approximate (arbitrary close) the location of the robber in the Euclidean plane.

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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