نتایج جستجو برای: least eigenvalue

تعداد نتایج: 404718  

Journal: :Linear Algebra and its Applications 2010

2017
Guanglong Yu Shuguang Guo Meiling Xu GUANGLONG YU SHUGUANG GUO MEILING XU

For a graph, the least signless Laplacian eigenvalue is the least eigenvalue of its signless Laplacian matrix. This paper investigates how the least signless Laplacian eigenvalue of a graph changes under some perturbations, and minimizes the least signless Laplacian eigenvalue among all the nonbipartite graphs with given matching number and edge cover number, respectively.

Journal: :Discussiones Mathematicae Graph Theory 2015

Journal: :Linear Algebra and its Applications 2013

Journal: :Quarterly of Applied Mathematics 1952

2013
GUANGLONG YU SHUGUANG GUO MEILING XU

For a graph, the least signless Laplacian eigenvalue is the least eigenvalue of its signless Laplacian matrix. This paper investigates how the least signless Laplacian eigenvalue of a graph changes under some perturbations, and minimizes the least signless Laplacian eigenvalue among all the nonbipartite graphs with given matching number and edge cover number, respectively.

2012
JIANFENG WANG YUFA SHEN QIONGXIANG HUANG

A new proof concerning the determinant of the adjacency matrix of the line graph of a tree is presented and an invariant for line graphs, introduced by Cvetković and Lepović, with least eigenvalue at least −2 is revisited and given a new equivalent definition [D. Cvetković and M. Lepović. Cospectral graphs with least eigenvalue at least −2. Publ. Inst. Math., Nouv. Sér., 78(92):51–63, 2005.]. E...

Journal: :Linear Algebra and its Applications 2008

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