Considering the subnormal subgroups,some equivalent conditions for nilpotency of finite groups are given and a sufficient condition for nilpotency of finite groups is obtained.
Indeed it seems capable of remaining in a chronic condition of subnormal activity for a considerable period without any marked tendency either towards recovery or towards complete collapse.
读。
有限群结构的影响,
零群的若干等价条件和一个充分条件。
（下）
一段时间内
持低于正常活动
或完全崩溃
