OK, . I have to prove this is a subgroup of S4. Now, Ive already proved closure by composition with to yield . Now, the identities wrt composition are and . What is the inverse!? How would you find the inverse wrt composition here? Thanks!
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Originally Posted by sfspitfire23 OK, . I have to prove this is a subgroup of S4. Now, Ive already proved closure by composition with to yield . Now, the identities wrt composition are and . What is the inverse!? How would you find the inverse wrt composition here? Thanks! A subroup of...who?? Anyway, it must be that Well, now just solve the above for Tonio
So there indeed will be 2 inverses?
Originally Posted by sfspitfire23 So there indeed will be 2 inverses? Of course not: this is a group. What gave you that idea? Tonio
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