Truncated metric dimension for finite graphs

Truncated metric dimension for finite graphs
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有限图的截断公制维度

DOI:
10.1016/j.dam.2022.04.021
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发表时间:
2022
影响因子:
1.1
通讯作者:
Yi, Eunjeong
Yi, Eunjeong
中科院分区:
数学3区
文献类型:
--
作者:
Frongillo, Rafael M.;Geneson, Jesse;Lladser, Manuel E.;Tillquist, Richard C.;Yi, Eunjeong

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设G是一个顶点集为V(G)的图,d(x,y)表示G中结点x和y之间的最短路的长度.对于正整数k且对于不同的x,y∈ V(G),令d k(x,y)= min {d(x,y),k+ 1}且R k {x,y}={z∈ V(G):d k(x,z)≠ d k(y,z)}。一个子集S ∈ V(G)是G的一个k-截断可解集,如果|S R k {x,y}| ≥ 1,对任意一对不同的x,y∈ V(G). G的k-截尾度量维数dim k(G)是G的所有k-截尾可解集上的最小基数,当k+ 1至少为G的直径时,恢复到通常的度量维数。我们得到了k-截尾度量维数的一些一般界。对所有k≥ 1,我们刻画了dim k(G)= n− 2和dim k(G)= n− 1的n阶连通图G.对任意的j,k≥ 1,我们求出了满足dim k(G)= j的图G的最大可能的阶、度、团数和色数.当G是圈或路时,我们确定了dim k(G).我们还研究了顶点或边删除对图的截断度量维数的影响,以及与树的截断度量维数有关的各种问题.
Let G be a graph with vertex set V (G), and let d (x, y) denote the length of a shortest path between nodes x and y in G. For a positive integer k and for distinct x, y∈ V (G), let d k (x, y)= min {d (x, y), k+ 1} and R k {x, y}={z∈ V (G): d k (x, z)≠ d k (y, z)}. A subset S⊆ V (G) is a k-truncated resolving set of G if| S∩ R k {x, y}|≥ 1 for any pair of distinct x, y∈ V (G). The k-truncated metric dimension, dim k (G), of G is the minimum cardinality over all k-truncated resolving sets of G, and the usual metric dimension is recovered when k+ 1 is at least the diameter of G. We obtain some general bounds for k-truncated metric dimension. For all k≥ 1, we characterize connected graphs G of order n with dim k (G)= n− 2 and dim k (G)= n− 1. For all j, k≥ 1, we find the maximum possible order, degree, clique number, and chromatic number of any graph G with dim k (G)= j. We determine dim k (G) when G is a cycle or a path. We also examine the effect of vertex or edge deletion on the truncated metric dimension of graphs, and study various problems related to the truncated metric dimension of trees.
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