中国科学技术大学学报 ›› 2013, Vol. 43 ›› Issue (8): 603-606.DOI: 10.3969/j.issn.0253-2778.2013.08.001

• 原创论文 •    下一篇

正则图的宽直径

李佳傲   

  1. 中国科学技术大学数学科学学院;中国科学院吴文俊数学重点实验室,安徽合肥 230026
  • 收稿日期:2012-12-20 修回日期:2013-05-22 出版日期:2013-08-31 发布日期:2013-08-31

The wide-diameter of regular graphs

LI Jiaao   

  1. School of Mathematical Sciences, University of Science and Technology of China; Wu Wentsun Key Laboratory of Mathematics, USTC, Chinese Academy of Sciences, Hefei 230026, China
  • Received:2012-12-20 Revised:2013-05-22 Online:2013-08-31 Published:2013-08-31
  • Contact: XU Junming
  • About author:LI Jiaao, male, born in 1990, master. Research field: Combinatorics and graph theory. E-mail: lijiaao@mail.ustc.edu.cn

摘要: 宽度为m的图G的直径是最小整数d,使得G中任何两顶点之间至少存在m条其长度都不超过d的内点不交的路.对于任何满足2w+5[]3≤m≤w的整数m,给出了n阶w正则w连通图的m宽直径的上界为(n-2)(w-2)[](w-m+1)(3m-w-4)+1.它能导出和改进某些已知结果.

关键词: 图论, 连通度, 直径, 宽直径, 正则图, 网络, 容错性

Abstract: The diameter with width m of a graph G is defined as the minimum integer d for which between any two distinct vertices in G there exist at least m internally disjoint paths of length of at most d. It was shown that the tight upper bound on m-diameter of w-regular w-connected graph with order n is(n-2)(w-2)[](w-m+1)(3m-w-4)+1 for any integer m with 2w+5[]3≤m≤w. Some known results can be deduced or improved from the obtained result.

Key words: graphs, connectivity, diameter, wide-diameter, regular graphs, networks, fault tolerance