Dear forum : I am new to GAP .I need you help ! Now I want to calculate the automorphism group ,but I do not know how to do it . G=<x,y:x^27=1=y^243,x^y=x^10> Could you give me some examples? Best wishes!! ___________________________________________________________ 好玩贺卡等你发,邮箱贺卡全新上线! http://card.mail.cn.yahoo.com/