Supported by National Natural Science Foundation of China(10601001);Anhui Provincial Natural Science Foundation(070412065);Project of Anhui Province for Young Teachers Research Support in University(2008jq1021,2008jq1083);Project of Anhui Province for Excellent Young Talent in University(2009SQRZ017ZD);Project of Anhui University on leading Researchers Construction
Supported by the National Natural Science Foundation of China (Grant No.10601001);the Natural Science Foundation of Anhui Province (Grant No.070412065);Project of Anhui Province for Young Teachers Research Supportin Universities (Grant No.2008jql083);Natural Science Foundation of Department of Education of Anhui Province(Grant No.2005kj005zd);Project of Anhui University on Leading Researchers Construction;Foundation of Innovation Team on Basic Mathematics of Anhui University
The Laplacian spread of a graph is defined to be the difference between the largest eigenvalue and the second smallest eigenvalue of the Laplacian matrix of the graph. In our recent work, we have determined the graphs...
Foundation item: the National Natural Science Foundation of China (No. 10601001); the Natural Science Foundation of Anhui Province (Nos. 050460102; 070412065); Natural Science Foundation of Department of Education of Anhui Province (No. 2005kj005zd); Project of Anhui University on leading Researchers Construction; Foundation of Innovation Team on Basic Mathematics of Anhui University.
In this paper, we characterize the trees with the largest Laplacian and adjacency spectral radii among all trees with fixed number of vertices and fixed maximal degree, respectively.
Supported by National Natural Science Foundation of China(10601001);Anhui Provincial Natural Science Foundation(050460102 ,070412065);NSF of Depart ment of Education of Anhui Province (2005kj005zd);Foundation of Innovation Teamon Basic Mathematics of Anhui University;Foundation of Talents Group Construction of Anhui University .
National Natural Science Foundation of China(10601001);Anhui Provincial Natural Science Foundation(050460102);NSF of Depart ment of Education of Anhui Province(2004kj027,2005kj005zd);Foundation of Mathematical Innovation Teamof Anhui University,and Foundation of Talents Group Construction of Anhui University
设U*为一个未定向的n个顶点上的单圈混合图,它是由一个三角形在其某个顶点上附加n-3个悬挂边而获得.在文[Largest eigenvalue of a unicyclic mixed graph,Applied Mathematics A Journal of Chinese Universities(Ser.B),2004,19(2):14...