作者empty24 ()
看板Math
标题[代数] semidirect product
时间Tue Mar 13 09:11:37 2012
If G is a group (|G|=24) and H < G is normal (|H|=2).
Suppose G/H is isomorphic to A_4. Write out all such G (up to isomorphism.)
感觉是用semi-direct product去做 (抑或是我误会了)
但还是不太会...
请给小弟一点方向, 感谢!
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另外还有一个问题
给定groups A and K, 如何说明不一样的group homomorphism f:A→Aut(K)
就决定出不同构的semi-direct product of K by A ?
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