摘要
本文提出三种使得距离无符号拉普拉斯谱半径变小的图的嫁接变换,并确定了距离无符号拉普拉斯谱半径取得最小值的恰有k个圈且含有悬挂顶点的n阶仙人掌图.
We propose three graft transformations that decrease the distance signless Laplacian spectral radius of graphs,and then determine the unique graph having the smallest distance signless Laplacian spectral radius over all cacti with n vertices,k cycles and at least one pendant vertex.
作者
王燕娜
周波
WANG Yanna;ZHOU Bo(Basic Courses Department,Guangdong Communication Polytechnic,Guangzhou 510650,China;School of Mathematical Sciences,South China Normal University,Guangzhou 510631,China)
出处
《应用数学》
CSCD
北大核心
2022年第3期695-700,共6页
Mathematica Applicata
基金
Supported by the National Natural Science Foundation of China(12071158)
the Basic and Applied Basic Research Project of Guangzhou Municipality of China(202102080685)。
