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浙江大学学报(理学版)  2018, Vol. 45 Issue (4): 391-393    DOI: 10.3785/j.issn.1008-9497.2018.04.001
数学与计算机科学     
超连通图的充分条件
郭利涛
厦门理工学院 应用数学学院, 福建 厦门 361024
Sufficient conditions for graphs to be super connected
GUO Litao
School of Applied Mathematics, Xiamen University of Technology, Xiamen 361024, Fujian Province, China
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摘要: G是一个连通图.图的连通度κG)存在一个最小正整数k,使得FV,|F|=kG-F不连通或是一个平凡图.如果每一个最小点割都孤立G的一个点,则图G是超连通的或超-κ的.定义没有孤立点的图G的逆度为RG)=1/(dv)).得到:设n阶连通图G,最小度为δ,若RG)<1+2/(δ+1)+(n-2δ-1)/((n-1)(n-3)),则G是超-κ的.
关键词: 连通度逆度超连通    
Abstract: Let G be a connected graph. The connectivity κ(G) of a connected graph G is the least positive integer k such that there is FV,|F|=k, and G-F is disconnected or is a trivial graph. If every minimum vertex cut isolates a vertex of G, a graph G is super connected or super-κ. Define the inverse degree of a graph G with no isolated vertices as R(G)=1/(d(v)). In this paper, we show that let G be a connected graph with order n and minimum degree δ, if R(G)<1+2/(δ+1)+(n-2δ-1)/((n-1)(n-3)), then G is super-κ.
Key words: connectivity    inverse degree    super connected
收稿日期: 2017-07-31 出版日期: 2018-07-12
CLC:  O157.5  
基金资助: Supported by NSFC(11301440).
作者简介: 郭利涛(1982-),ORCID:http://orcid.org/0000-0003-1410-8509,male,doctor,associate professor,the field of interest is graph theory,E-mail:ltguo2012@126.com.
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引用本文:

郭利涛. 超连通图的充分条件[J]. 浙江大学学报(理学版), 2018, 45(4): 391-393.

GUO Litao. Sufficient conditions for graphs to be super connected. Journal of Zhejiang University (Science Edition), 2018, 45(4): 391-393.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2018.04.001        https://www.zjujournals.com/sci/CN/Y2018/V45/I4/391

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