The topological analysis for BHn+m's with open structure n:the number of B atoms,also the minimal number of B-H bonds m:the number of extra H atomes 硼烷结构的拓扑分析法styx method B:Ho BB H H B H H B H B H B H H H B B H B B B B B H B B B B H H B B s t y x B5H9 硼烷结构的拓扑分析法 styx method The topological analysis for BnHn+m’s with open structure n: the number of B atoms, also the minimal number of B-H bonds m:the number of extra H atomes