Connectivity of Connected Bipartite Graphs with Two Orbits

Connectivity of Connected Bipartite Graphs with Two Orbits
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DOI:
10.1007/978-3-540-72588-6_55
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发表时间:
2007-05
期刊:
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影响因子:
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通讯作者:
Xiaodong Liang;J. Meng
Xiaodong Liang;J. Meng
中科院分区:
其他
文献类型:
--
作者:
Xiaodong Liang;J. Meng

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设X= (V,E)为简单连通图,X的连通性κ(X)为X中所有顶点割集的最小基数。设x∈V(X),集合{xg:g∈Aut(X)}称为Aut(X)的轨道,即X的自同构群。在这篇文章中,我们证明了具有两个轨道的连通二分图的连通性达到了最小程度。
LetX= (V,E) be a simple connected graph, the connectivityκ(X) ofXis the minimum cardinality of all vertex cut sets inX. Letx∈V(X), the set {xg:g∈Aut(X)} is called an orbit ofAut(X), the automorphism group ofX. In this note, we prove that the connectivity of a connected bipartite graph with two orbits attains its minimum degree.