详细信息
文献类型:期刊文献
中文题名:关于树图的谱半径的界
英文题名:Upper Bounds on the Spectral Radius of Tree Graphs
作者:施劲松[1];束金龙[2]
机构:[1]华东理工大学数学系,上海200237;[2]华东师范大学数学系,上海200062
年份:2004
卷号:30
期号:6
起止页码:716
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;Scopus;北大核心:【北大核心2000】;CSCD:【CSCD2011_2012】;
基金:华东理工大学科研基金资助项目
语种:中文
中文关键词:树图;邻树图;谱半径;边色数
外文关键词:tree graph; adjacent tree graph; spectral radius; edge chromatic number
摘要:给出了由边数为m、顶点数为n的简单连通图G生成的树图T(G)及邻树图T*(G)的谱半径的上界:ρ(T(G))≤det(Hr(G))1-1mρ(T*(G))≤det(Hr(G))1-1χ′(G)其中χ′(G)是图G的边色数;并指出当G Cn时,ρ(T(G))的上界可达。
Let G be a simple connected graph with m edges and n vertices. Denote T(G) and T~*(G) by the tree graph and the adjacent tree graph of G respectively. In this paper, the upper bounds for the spectral radius of tree graphs and adjacent tree graphs are given as follows,ρ(T(G))≤det(H_r(G))1-1mρ(T~(G))≤det(H_r(G))1-1χ′(G)where χ′(G) is the edge chromatic number of G. Moreover, when GC_n, bound of ρ(T(G)) is sharp.
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