分图又称作二部图，是图论中的一种特殊模型。 设G=(V,E)是一个无向图，如果顶点V可分割为两个互不相交的子集(A,B)，并且图中的每条边（i，j）所关联的两个顶点i和j分别属于这两个不同的顶点集(i in A,j in B)，则称图G为一个二分图。-Bipartite graph is also called a bipartite graph, graph theory, a special model. Let G = (V, E) is an undirected graph, vertex V can be divided into two disjoint subset (A, B), and in each edge (i, j) is associated with two vertices i and j, respectively belonging to these two different set of vertices (i in A, in B), then G is a bipartite graph.