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!
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!