Supported by the National Natural Science Foundation of China (No.60863006);Program for New Century Excellent Talents in University (No.06-0912)
For a simple undirected graph G, denote by λ(G) the (0, 1)-adjacency matrix of G. Let the matrix S(G) = J-I-2A(G) be its Seidel matrix, and let SG(A) = det(AI-S(G)) be its Seidel characteristic polynomi...
Supported by the NSFC(60863006);Supported by the NCET(-06-0912);Supported by the Science-Technology Foundation for Middle-aged and Yong Scientist of Qinghai University(2011-QGY-8)
For a simple graph G,let matrix Q(G)=D(G) + A(G) be it's signless Laplacian matrix and Q G (λ)=det(λI Q) it's signless Laplacian characteristic polynomial,where D(G) denotes the diagonal matrix of vertex degrees of ...