摘要
设T是n阶树,在Neumaier给出的树图第二大特征值性质的基础上,通过构造导出子树的结构,刻画了所有λ_(2)(T)≤√3的树图.
Let T be a tree of order n.Based on the second largest eigenvalue property of tree graphs given by Neumaier,the structure of the induced subtree is constructed to describe all trees withλ_(2)(T)≤√3.
作者
阮晓露
吴晓霞
RUAN Xiaolu;WU Xiaoxia(School of Mathematics and Statistics,Minnan Normal University,Zhangzhou,Fujian 363000,China;Institute of Meteorological Big Data-Digital Fujian,Zhangzhou,Fujian 363000,China;Fujian Key Laboratory of Data Science and Statistics,Zhangzhou,Fujian 363000,China)
出处
《闽南师范大学学报（自然科学版）》
2021年第4期1-7,共7页
Journal of Minnan Normal University：Natural Science
基金
福建省自然科学基金(2020J01795)。
关键词
树
第二大特征值
导出子图
tree
second largest eigenvalue
induced subgraph
