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• 数学 • 上一篇    下一篇

连通度为k的图的L(2,1)-标号

吕大梅1,2, 林文松2, 宋增民2   

  1. 1. 南通大学 理学院, 江苏省 南通 226007; 2. 东南大学 数学系, 南京 210096
  • 收稿日期:2006-09-18 修回日期:1900-01-01 出版日期:2007-07-26 发布日期:2007-07-26
  • 通讯作者: 吕大梅

L(2,1)-Labelings of Graphs with Connectivity k

LV Damei1,2, LIN Wensong2, SONG Zengmin2   

  1. 1. College of Science, Nantong University, Nantong 226007, Jiangsu Province, China;2. Department of Mathematics, Southeast University, Nanjing 210096, China
  • Received:2006-09-18 Revised:1900-01-01 Online:2007-07-26 Published:2007-07-26
  • Contact: LV Damei

摘要: 通过找出图G的补图Gc的路覆盖数与其子图G-S的各个连通分支补图的路覆盖数间的关系, 在图G的λ数与其补图Gc的路覆盖数之间关系的基础上, 给出图G的λ数与子图G-S的各个连通分支补图的路覆盖数之间的关系(这里S是G的一个k顶点割).

关键词: L(2,1)-标号, 路覆盖数, 连通度

Abstract: We firstly gave the relationship between the path covering number of the complement Gcof G and the path covering number of the complement graphs of the connect components of G-S. And we then obtained the relationship between the λnumber of graph Gwith connectivity kand the path covering number of the complement graphs of the connect components of G-S via the relationship between the λnumber of graph Gand the path covering number of its complement Gcwhere Sis a kvertexcut ofG ).

Key words: L(2,1)-labelings, path covering number, connec tivity

中图分类号: 

  • O157.5