Supported by the National Natural Science Foundation of China (Grant No.12001434);The Natural Science Basic Research Program of Shaanxi Province (Grant No.2022JM-006);Chinese Universities Scientific Fund (Grant No.2452020021)
Let D be a weighted digraph with n vertices in which each arc has been assigned a positive number.Let A(D)be the adjacency matrix of D and W(D)=diag(w_(1)^(+),w_(2)^(+),...,w_(n)^(+)).In this paper,we study the matrix...