常见例句Digraphs have a simple pictorial representation.有向图有简单的图形表示。Using matrix theory, we present a sharp upper bound on the spectral radius of digraphs and strongly connected diagraphs.摘要利用矩阵理论，给出了简单有向图的谱半径可达上界和强连通有向图的谱半径上界。 返回 digraphs