The Signless Laplacian Spectral Characterization of Strongly Connected Bicyclic Digraphs

• 作 者: Weige XI Ligong WANG
• 机 构: DepartmentofAppliedMathematics
• 出 处: 数学研究及应用：英文版
• 发表日期: 2016年1期
• 关键词: 拟拉普拉斯矩阵 有向图 强连通 谱特性 谱半径 对角矩阵 邻接矩阵 双环 the signless Laplacian spectral radius ∞-di
• 基金项目: Supported by the National Natural Science Foundation of China （Grant No. 11171273）.

Let G be a digraph and A(G) be the adjacency matrix of G. Let D(G) be the diagonal matrix with outdegrees of vertices ofG and Q(G) = D(G) + A(G) be the signless Laplacian matrix of G. The spectral radius of Q(G) is called the signless Laplacian spectral r