And the coefficients of eigen-polynomial expressions were closely related to the circular sets of a directional graph. 而特征多项式的系数与有向图的圆族有着密切的关系。
In a directed graph, the decision variables of the shortest path computation must be determined by a constraint that is called Kirchoff's constraint. 摘要已知一个有向图，求解两点间的最短路径的决策变量满足基尔霍夫约束关系。
