摘要
图G的扩展能量E_(ex)(G)定义为图的扩展邻接矩阵A_(ex)(G)特征值的绝对值之和.利用分析和基本不等式技巧,得出了树的扩展能量的几个上界.
The extended energy of a graph G, denoted by values of all eigenvalues of the extended adjacency matrix. In this inequality, we obtain some upper bounds for the extended energy Eex(G) , is defined as the sum of the absolute paper, using the technique of analysis and basic of trees.
作者
徐幼专
侯耀平
Xu Youzhuan;Hou Yaoping(Shaoyang Radio & TV University,422000,Shaoyang,Hunan,China;School of Mathematics and Statistics,Hunan Normal University,410081,Changsha,China)
出处
《山东师范大学学报(自然科学版)》
CAS
2018年第3期278-281,共4页
Journal of Shandong Normal University(Natural Science)
基金
国家自然科学基金资助项目(11571101)
湖南省教育厅科学研究资助项目(15C1235)
关键词
树
扩展能量
上界
tree
extended energy
upper bound