摘要
证明了树及同构的树的并在研究紧性时的几个结论 ,得到了其邻接矩阵的元素xij>0的一个必要条件 ,建立了当xij>0时其对应顶点的邻点集之间的同构映射 ,并证明了由同构的树组成的森林是紧图 .
Some results of the compactness of tree and the union of some isomorphic trees are obtained. It gives us a necessary condition of their adjecent matrix when its element is positive. It establishes a isomorphic function between the neighborset of the veteces when x ij >0. Finally it shows that the forest which consists of some isomorphic trees is compact graph.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第2期147-152,共6页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金!资助项目 (199710 0 9)
