以下定理奠定了群基本同态定理的基础 Theorem11.2Letφ：G→HI be a group homomorphism.Then the kernel of o is a normal subgroup of G. Example 7.Let G be a group.Suppose that g E G and o is the homo- morphism from Z to G given by o(n)=g".If the order of g is infinite, then the kernel of this homomorphism is {0}since o maps Z onto the cyclic subgroup of G generated by g.However,if the order of g is finite,say n, then the kernel of o is以下定理奠定了群基本同态定理的基础 ？