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The preclusion numbers and edge preclusion numbers in a class of Cayley graphs
Discrete Applied Mathematics ( IF 1.1 ) Pub Date : 2020-04-20 , DOI: 10.1016/j.dam.2020.04.010
Guozhen Zhang

Let G be a hierarchical network (graph) with vertex set V(G) and edge set E(G). The preclusion set of the subnetwork G (defined as a smaller network but with the same topological properties as the original one) in G is a subset V of V(G) such that GV has no any subnetwork isomorphic to G. The preclusion number of G in G is F(G)=min{|V|:V is the preclusion set of G}. Similarly, the edge preclusion set of G in G is a subset E of E(G) such that GE has no any subnetwork isomorphic to G. The edge preclusion number of G in G is f(G)=min{|E|:E is the edge preclusion set of G}. The preclusion number and edge preclusion number are parameters which measure the fault tolerance of interconnection networks in the presence of failures. In this paper, we investigate the two parameters for a class of Cayley graphs T2n+1 generated by the transposition tree similar to the star. Let m be an integer with 0mn1, let F(n,m)=F(T2(nm)+1), and let f(n,m)=f(T2(nm)+1). We prove that F(n,0)=f(n,0)=1, F(n,1)=2n(2n+1) with 2n+1 prime, f(n,1)4n(2n+1) with 2n+1 prime, F(n,n1)=(2n+1)!6, f(n,n1)=n(2n+1)!6, and 2n+12m(2m)!F(n,m)f(n,m)nm2n+12m(2m)!. Finally, we prove that F(n,m) is of order at most n3m1.



中文翻译:

一类Cayley图的排除数和边缘排除数

G 是具有顶点集的分层网络(图形) VG 和边缘集 ËG。子网的排除集G (定义为较小的网络,但具有与原始网络相同的拓扑属性) G 是一个子集 VVG 这样 G-V 没有任何同构的子网 G。的排除数GGFG={|V|V 是...的排除集 G}。同样,边缘排除集GG 是一个子集 ËËG 这样 G-Ë 没有任何同构的子网 G。的边缘排除数GGFG={|Ë|Ë 是的边缘排除集 G}。排除编号和边缘排除编号是在出现故障时测量互连网络的容错能力的参数。在本文中,我们研究了一类Cayley图的两个参数Ť2ñ+1个由转置树生成的类似于星星的。让 是一个整数 0ñ-1个,让 Fñ=FŤ2ñ-+1个, 然后让 Fñ=FŤ2ñ-+1个。我们证明Fñ0=Fñ0=1个Fñ1个=2ñ2ñ+1个2ñ+1个 主要, Fñ1个4ñ2ñ+1个2ñ+1个 主要, Fññ-1个=2ñ+1个6Fññ-1个=ñ2ñ+1个62ñ+1个22FñFññ2ñ+1个22。最后,我们证明Fñ 最多是有秩序的 ñ3-1个

更新日期:2020-04-20
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