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新疆大学数学与系统科学学院
Published:2017
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[1]秦德金,田应智,孟吉翔.圈的笛卡积的圈点连通度(英文)[J],2017,34(04):415-420.
[1]秦德金,田应智,孟吉翔.圈的笛卡积的圈点连通度(英文)[J],2017,34(04):415-420. DOI: 10.13568/j.cnki.651094.2017.04.007.
DOI:10.13568/j.cnki.651094.2017.04.007.
设G是一个点集为V(G)
边集为E(G)的图.对于图G的点子集S
如果G-S不连通并且至少两个连通分支包含圈
则称S为一个圈点割.如果一个图有圈点割
称该图为圈可分离的.一个圈点可分离图G的最小圈点割的阶数被称为圈点连通度
记作κc(G).文章证明了κc(C3□Cn1□Cn2□···□Cnk)=6k和κc(Cn1□Cn2□···Cnk)=8k-8
其中对于i=1
2
···
k
Cni是一个长度大于等于4的圈.
Let G be a graph with vertex set V(G) and edge set E(G).A vertex subset S?V(G) is called a cyclic vertex-cut if G-S is disconnected and at least two components of G-S contain cycles.If G has a cyclic vertex-cut
then it is said to be cyclically separable.For a cyclically separable graph G
the cyclic vertex-connectivity of a connected graph G
denoted by κc(G)
is defined as the minimum cardinality of all cyclic vertex-cuts of G.In this paper
we prove that κc(C3□Cn1□Cn2□···□Cnk)=6 k and κc(Cn1□Cn2□···Cnk)=8 k-8
where Cni is a cycle with ni≥4 for i=1
2
···
k.
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