Posted by haifeng on 2011-08-08 16:25:25 last update 2011-08-08 16:27:29 | Answers (0) | 收藏
[亦称群同态第二基本定理(Emmy Noether)] 设 $N\trianglelefteq G,\ M\trianglelefteq G$ 且 $N\subset M$, 则 $N$ 是 $M$ 的正规子群, 并且
