On graphs with exactly three Q-eigenvalues at least two

被引：2
|
作者：
Wang, JianFeng [1 ]
Belardo, Francesco [2 ]
Wang, Wei [1 ]
Huang, QiongXiang [3 ]
机构：
[1] QingHai Normal Univ, Dept Math, Xining 810008, Qinghai, Peoples R China
[2] Univ Messina, Dept Math & Comp Sci, I-98166 Messina, Italy
[3] Xinjiang Univ, Coll Math & Syst Sci, Urumqi 830046, Peoples R China
来源：
LINEAR ALGEBRA AND ITS APPLICATIONS | 2013年 / 438卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Signless Laplacian; Circumference; Q-matrix; Graph eigenvalue; HIGH-ENERGY BAND; GREATER-THAN; 2; LAPLACIAN EIGENVALUES; SIGNLESS LAPLACIAN; SMALL NUMBER; SPECTRUM;
D O I：
10.1016/j.laa.2012.11.032
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
For a graph G, we here investigate its signless Laplacian matrix Q(G) and the corresponding Q-eigenvalues. By considering the relation between the Q-spectrum and the circumference of G, we characterize all connected graphs with exactly three Q-eigenvalues at least two. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：2861 / 2879
页数：19
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