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有限交换群上Bi-Cayley图的Hamilton性及偶泛圈性

Hamiltonian Properties and Bipancyclicity of Bi-Cayley Graphs on Finite Abelian Groups

【作者】 王爱民

【导师】 孟吉翔;

【作者基本信息】 新疆大学 , 应用数学, 2006, 硕士

【摘要】 设G是一个有限群,S是G的一个子集(可以含G的单位元).Bi-Cayley图BC(G,S)是一个二部图:其顶点集为G×{0,1},而边集为{{(g,0),(sg,1)}:g∈G,s∈S}。 设X是一个图,称X的一个圈是Hamilton圈,如果它包含X的所有顶点。 设X是一个图,|V(X)|=n.称图X是泛圈图,如果X中含有长为k(k=3,…,[,n)的圈。 设X是一个图,|V(X)|=n.称图X是偶泛圈图,如果X中含有长为2k(k=2,3,…,[n/2])的圈。 称Bi-Cayley图BC(G,S)的边{(g,0),(sg,1)}为s边,其中9∈G,s∈S. 称Bi-Cayley图BC(G,S)是s边传递的,若对BC(G,S)的任意两条s边e1、e2,都存在一个BC(G,S)的自同构映射φ,满足φ(e1)=e2。 本文证明了以下结论: 1.(引理1) 设G是有限交换群,S(?)G,S-1=S,S={s1,s2,s3,…,sn},S′={e,s2s1,s3s1…,sns1),其中s1是二阶元.则(S′)-1=S′且BC(G,S)(?)BC(G,S′)。 2.(引理2) 设G是有限交换群,S(?)G,e∈S,Bi-Cayley图BC(G,S)连通当且仅当

【Abstract】 Let G be a finite group, S(possibly, contains the identity element) be a subset of G. The Bi-Cayley graph BC(G, S) is a bipartite graph with vertex set G × {0,1} and edge set {{(g,0),(sg,1)}, g∈G, s ∈ S}.Let X be a graph. A Hamilton cycle of X is a cycle that contains every vertex of X.Let X be a graph, |V(X)| = n. X is pancyclic if X contains cycles of lengthk(k=3,4,…,n).Let X be a graph, |V(X)| = n. X is bipancyclic if X contains even-cycles of length 2k(k = 2,3,… , ).Let BC(G, S) be a Bi-Cayley graph. An edge of BC(G, S) with vertices (g, 0) and (sg, 1) is called a s edge.A Bi-Cayley graph BC(G, S) is said to be s edge-transitive if for every two s edges e1 and e2 of BC(G, S), there is an automorphism of BC(G, S) that maps e1 to e2, respectively.In this thesis, we characterize the Hamiltonian properties and bipancyclicity of connected Bi-Cayley graphs on finite Abelian groups. The following are our main results.1. (Lemma 1) Let G be a finite Abelian group. S G, S-1 = S, S = {S1,S2,S3, … , Sn}, S’ = {e, S2S1, S3S1, … , SnS1}, where S1 is an element of order 2. then (S’)-1 = S’ and BC(G,S) ≌ BC{G,S’).2. (Lemma 2) Let G be a finite Abelian group. S G, e ∈ S, Bi-Cayley graph BC(G,S) is connected if and only if

【关键词】 Cayley图Bi-Cayley图同构hamilton圈偶泛圈
【Key words】 Cayley graphBi-Cayley graphsisomorphismbipancyclic
  • 【网络出版投稿人】 新疆大学
  • 【网络出版年期】2006年 12期
  • 【分类号】O157.5
  • 【下载频次】40
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