New Bounds for Estrada Index

被引：0
|
作者：
Li, Bingjun [1 ]
机构：
[1] Hunan Inst Humanities Sci & Technol, Dept Math, Loudi 417000, Hunan, Peoples R China
来源：
MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY | 2017年 / 77卷 / 03期
关键词：
ZAGREB INDEXES; FOLDING DEGREE; PROTEINS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
An (m, n)-graph G is a simple graph with n vertices and m edges. Let AI, lambda(1),...lambda(n) be the eigenvalues of its adjacent matrix. The Estrada index of G, denoted by EE(G), is the sum of the terms ear. The first Zagreb index, denoted by Z(g1)G), is the sum of the terms d(i)(2)where d(i) is the degree of v(i) i = 1,2...n. In this paper we prove that m + n <= EE(G) for every (m, n)-graph, and establish a new upper bound for EE(G) in terms of the first Zagreb index.
引用
收藏
页码：701 / 706
页数：6
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