代玉林, 孟吉翔. 给定围长的图的超三限制性连通度的充分条件(英文)[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 2011, 28(1): 14-22.DOI:
给定围长的图的超三限制性连通度的充分条件(英文)
摘要
图G是一个连通图.称X为三限制性割
如果G-X的每个连通分支至少有三个点.三限制性连通度κ3(G)是三限制性割的最小基数
更进一步
如果图G的围长为4
去掉最小的三限制性割孤立出一条二长路
则称它是超三限制性连通的.本文给定了图是超三限制性连通的直径围长充分条件
还研究了超三限制性边连通图.
Abstract
Let G = (V
E) be a connected graph. A vertex-cut X is said to be a 3-restricted cut of G if G ? X is notconnected and every component of G - X has at least three vertices. The 3-restricted connectivity κ3(G) of a connectedgraph G is defined as the minimum cardinality of a 3-restricted cut. Additionally
if G is a graph with girth g ≥ 4 suchthat the deletion of every minimum 3-restricted cut isolates a 2-path
then G is said to be super 3-restricted connected. Inthis paper
we give some sufficient conditions for a graph to be super 3-restricted connected in terms of the girth and thediameter
we also study super 3-restricted edge connected graph.
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references
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