For computer processing of the directed digraph, it is expressed by a matrix, and then the longest directed paths can be obtained through matrices multiplication.
为了便于计算机处理，将有向图用矩阵表示，通过有向图矩阵的乘法运算搜索最长的有向路径。
By using the matrix representation of a digraph, some results about the index of convergence and period of a line digraph are obtained.
采用有向图的矩阵表示，得到了线有向图的幂敛指数和周期的有关结果。
By using the matrix representation of a digraph, some results about the index of convergence and period of a line digraph are obtained.
采用有向图的矩阵表示，得到了线有向图的幂敛指数和周期的有关结果。
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