arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1509.02129math.CO
收藏

度量维数为2的图的一个特征

A characterization of some graphs with metric dimension two

Ali Behtoei, Akbar Davoodi, Mohsen Jannesari, Behnaz Omoomi

摘要:

一个集合W \subseteq V(G)称为分解集,如果对于每对不同的顶点u,v \in V(G)存在t个\in W使得d(u,t)\neq d(v,t),其中d(x,y)是顶点x和y之间的距离. G的最小分解集的基数称为G的度量维数,记为dim_M(G)。一棵k-树是一个弦图,它的所有最大团都是相同的大小k + 1,所有最小团分离子也都是相同的大小k。k-路是最大度为2k的k-树,其中对任意整数j,k \leq j < 2k,存在唯一的顶点对u和v,使得deg(u)= deg(v)= j.本文证明了:若G是k-路,则dim_M(G)= k.此外,我们还给出了度量维数为2的所有2-树的一个刻画。

英文摘要:

A set W \subseteq V (G) is called a resolving set, if for each pair of distinct vertices u,v \in V (G) there exists t \in W such that d(u,t) \neq d(v,t), where d(x,y) is the distance between vertices x and y. The cardinality of a minimum resolving set for G is called the metric dimension of G and is denoted by dim_M(G). A k-tree is a chordal graph all of whose maximal cliques are the same size k + 1 and all of whose minimal clique separators are also all the same size k. A k-path is a k-tree with maximum degree 2k, where for each integer j, k \leq j < 2k, there exists a unique pair of vertices, u and v, such that deg(u) = deg(v) = j. In this paper, we prove that if G is a k-path, then dim_M(G) = k. Moreover, we provide a characterization of all 2-trees with metric dimension two.

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。

↑