正则图的Upper减控制数

正则图的Upper减控制数

论文摘要

图G=(V,E)上的函数f:V→{-1,0,1}被称为是图G上的一个减控制函数,如果对任意的点v∈V,都有减控制函数f是图G上的极小减控制函数,如果不存在减控制函数g:V→{-1,0,1},f≠g,使得对任意的点v∈V,g(v)≤f(v)都成立.图G的减控制数通常表示为γ-(G),它为G上所有的减控制函数之中权重的最小数值;图G的Upper减控制数记为Γ-(G),它是图G上所有的极小减控制函数之中权重的最大数值.也即是:γ-(G)=min{ω(f)|f为G上的减控制函数}和Γ-(G)=max{ω(f)|f为G上的极小减控制函数}.图G=(V,E)上的函数f:E→{-1,0,1}被称为是图G上的减边控制函数,如果对于图G的每一条边e∈E都有图G的减边控制数通常表示为γ’m(G),它为图G上所有的减边控制函数之中权重的最小数值;图G的Upper减边控制数记为Γ’m(G),它是图G上所有的极小减边控制函数之中权重的最大数值.也即是:γ-(G)=min{ω(f)|f为G上的减边控制函数}和Γ-(G)=max{ω(f)|f为G上的极小减边控制函数}.本文通过对图的结构性质的分析,得到了正则图的Upper减控制数,主要结论如下:(1)对任意的n阶三正则图G都有Γ-(G)≤5/8n,且此界是可达的,并构造出一类Γ-(G)=5/8n的图;对任意的n阶四正则图G都有Γ-(G)≤7/(10)n;对任意的n阶五正则图G都有Γ-(G)≤3/4n;(2)对任意的n阶k-正则图G都有Γ-(G)≤(2k-1)/(2(k+1))n;(3)对于任意的有m条边的三正则图G都有Γ’m(G)≤(2m)/3.

论文目录

  • 摘要
  • ABSTRACT
  • 目录
  • 1 绪论
  • 1.1 基本概念
  • 1.1.1 关于图的点控制的研究背景和一些概念
  • 1.1.2 图的点控制数的研究背景
  • 1.1.3 关于图的边控制的一些概念
  • 1.2 研究概况
  • 1.2.1 图的点控制数的研究概况
  • 1.2.2 图的边控制数的研究概况
  • 1.3 本文的主要结果
  • 2 三、四、五正则图的Upper减控制数
  • 2.1 引理
  • 2.2 主要结果
  • 3 k-正则图的Upper减控制数
  • 4 三正则图的减边控制数
  • 4.1 引理
  • 4.2 主要结果
  • 参考文献
  • 在学期间的研究成果及发表的论文
  • 致谢
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    正则图的Upper减控制数
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