subgroup

1.Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.

亚群禽白血病病毒(ALV-J)是要感染肉用型鸡反转录病毒。

2.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.

研究次正规子群对有限群结构影响,得到幂零群若干等价条件和个充分条件。

3.Let G be an infinite group. If G has a normal elementary abelian subgroup, then G is irrecognizable.

设G是无限群,若G存在正规初等交换子群,则G是不可分辨.