http://139.196.53.116/ml/index.php/action/login?_=4a01ed4dbb4a050a5cd19258d6742ddd
群同态基本定理Ihttps://mp.weixin.qq.com/s?__biz=MzIxOTIyMzE4Mg==&mid=2247486824&idx=1&sn=6300c558aaf4af959519cc24e4867662&chksm=97dfc889a0a8419f387af1c352c239c066b7fd6832bc3106550d104949062ac8f2e660a9360b&scene=178&cur_album_id=1520494386713772037#rd
群同态基本定理II，3https://mp.weixin.qq.com/s?__biz=MzIxOTIyMzE4Mg==&mid=2247486848&idx=1&sn=8e749e99d37ee1eac4037dfc581f0ea2&chksm=97dfc861a0a84177d2173091a019596ffdb681d0f8f811c993e43470effac0ae6eb2318f6964&scene=178&cur_album_id=1520494386713772037#rd
群的满同态https://mp.weixin.qq.com/s?__biz=MzIxOTIyMzE4Mg==&mid=2247486900&idx=1&sn=fe42e4f4db2c9559ad814ba87f421dee&chksm=97dfc855a0a841436ba57ba4934dd62f3d96c507f4f2e5567cc9cbab6806b76832dd7bafff28&scene=178&cur_album_id=1520494386713772037#rd