设H是G的子群,称H为弱-可补的,如果存在G的子群T使得G=HT且H∩T≤H-sG,其中H-sG是由H的所有在G中s-半置换子群生成的群。本文讨论有限群G的极小子群及4阶循环子群的弱-可补性对有限群结构的影响,给出了群G的p-幂零性的几个充分条件。
Let H be a subgroup of a finite group G.H is called weakly -supplemented if there exists asubgroup T of G such that G=TH and H∩T≤H-sG,where H-sG is the subgroup generalized by allsubgroups of H which are s-semipermutable in G.In this paper,the influence of minimal subgroups andsubgroups of order 4 which are weakly -supplemented in G on the structure of finite groups is studied,and several sufficient conditions of p-nilpotency of G are given.