1. The problem statement, all variables and given/known data If a and g are elements of a group, prove that C(a) is isomorphic to C(gag-1) 2. Relevant equations I have defined to mapping to be f:C(gag-1) to C(a) with f(h)=g-1hg. I have no idea if this is right. 3. The attempt at a solution I don't have a clue at the solution, any help would be greatly appreciated.