几个有趣的同构结论 Theorem 9.3 If G is a cyclic group of order n,then G is isomorphic to Zn. Corollary 9.4 If G is a group of order p,where p is a prime number,then G is isomorphic to Zp. Theorem 9.6(Cayley)Every group is isomorphic to a group of permu- tations.几个有趣的同构结论