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arXiv 1602.00291math.CO
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唯一标识图的边:边度量维数

Uniquely identifying the edges of a graph: the edge metric dimension

Aleksander Kelenc, Niko Tratnik, Ismael G. Yero

摘要:

设$G=(V,E)$是一个连通图,$v\in V$是一个顶点,$e=uw\in E$是一条边.顶点$v$和边$e$之间的距离由$d_G(e,v)=\min\{d_G(u,v),d_G(w,v)\}$给出。如果$d_G(w,e_1)\ne d_G(w,e_2)$,则顶点$w\in V$区分两条边$e_1,e_2\in E$。连通图$G$中的顶点集$S$是$G$的边度量生成元,如果$G$的每两条边由$S$的某个顶点区分。用于$G$的边缘度量生成器的最小基数被称为边缘度量维度,并且由$edim(G)$表示。本文引入了边度量维数的概念,并对它的数学性质进行了初步的研究。对图的边度量维数和标准度量维数进行了比较,并给出了关于图的边度量维数和标准度量维数的一些实现结果.证明了计算连通图的边度量维数是NP-困难的,并给出了一些近似结果。此外,我们还给出了几类图的边度量维数的界和封闭公式。

英文摘要:

Let $G=(V,E)$ be a connected graph, let $v\in V$ be a vertex and let $e=uw\in E$ be an edge. The distance between the vertex $v$ and the edge $e$ is given by $d_G(e,v)=\min\{d_G(u,v),d_G(w,v)\}$. A vertex $w\in V$ distinguishes two edges $e_1,e_2\in E$ if $d_G(w,e_1)\ne d_G(w,e_2)$. A set $S$ of vertices in a connected graph $G$ is an edge metric generator for $G$ if every two edges of $G$ are distinguished by some vertex of $S$. The smallest cardinality of an edge metric generator for $G$ is called the edge metric dimension and is denoted by $edim(G)$. In this article we introduce the concept of edge metric dimension and initiate the study of its mathematical properties. We make a comparison between the edge metric dimension and the standard metric dimension of graphs while presenting some realization results concerning the edge metric dimension and the standard metric dimension of graphs. We prove that computing the edge metric dimension of connected graphs is NP-hard and give some approximation results. Moreover, we present some bounds and closed formulae for the edge metric dimension of several classes of 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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