J4 ›› 2011, Vol. 24 ›› Issue (4): 73-77.

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连通、P3局部连通[5,3]-图的圈可扩性

 黄莎莎, 王江鲁   

  1. 山东师范大学数学科学学院,山东 济南 250014
  • 出版日期:2011-08-20 发布日期:2011-08-20

Cycle extendability of connected and P3-locally connected [5,3]-graphs

 HUANG Sha-Sha, WANG Jiang-Lu   

  1. School of Mathematics, Shandong Normal University, Jinan 250014, China
  • Online:2011-08-20 Published:2011-08-20

摘要:

      如果图G的任意s个顶点的导出子图中至少含有t条边,则称G为[s,t]-图。设H是一个图,如果图G中任意一个同构于H的子图F,有G[N(F)-V(F)]连通,则称G是H-局部连通的。本文证明:阶数≥8的连通、P3-局部连通的[5,3]-图是1-2可扩的(这里P3表示3阶路)。

关键词: [s, t]-图, H-局部连通图, 1-2可扩图

Abstract:

         A graph G is a [s,t]-graph if there are at least t edges in every included subgraph of s vertices. Let H be a graph. A graph G is H-locally connected if G[N(F)-V(F)] is connected for its any subgraph F isomorphic to H. This paper proves that a connected and P3 locally connected [5,3]-graph,whose order n≥8 ,is 1-2 extendable. (P3 is an order 3 path.)

Key words: [s,t]-graph, H-locally connected graph, 1-2 extendable graph

中图分类号: 

  • O157.5