The distance-k dimension of graphs
The distance-k dimension of graphs
复制标题
图的距离k维
DOI:
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发表时间:
2021
期刊:
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通讯作者:
Eunjeong Yi
中科院分区:
文献类型:
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作者:
Jesse T. Geneson;Eunjeong Yi
The metric dimension, dim(G), of a graph G is a graph parameter motivated by robot navigation that has been studied extensively. Let G be a graph with vertex set V (G), and let d(x, y) denote the length of a shortest x − y path in G. For a positive integer k and for distinct x, y ∈ V (G), let dk(x, y) = min{d(x, y), k + 1} and let Rk{x, y} = {z ∈ V (G) : dk(x, z) 6= dk(y, z)}. A subset S ⊆ V (G) is a distance-k resolving set of G if |S ∩ Rk{x, y}| ≥ 1 for any pair of distinct x, y ∈ V (G), and the distance-k dimension, dimk(G), of G is the minimum cardinality over all distance-k resolving sets of G. Note that, for the diameter d of G, dimk(G) = dim(G) if k ≥ d− 1, and dim1(G) is the adjacency dimension of G introduced by Jannesari and Omoomi in 2012. In this paper, we initiate the study of distance-k dimension of graphs. We obtain some general bounds for distance-k dimension. We characterize connected graphs G of order n with dimk(G) ∈ {1, n− 2, n− 1} for all k ≥ 1. We determine dimk(G) when G is a cycle or a path. We also examine the effect of vertex or edge deletion on the distance-k dimension of graphs.