The $p^n$ theorem for semisimple Hopf algebras
The $p^n$ theorem for semisimple Hopf algebras
We give an algebraic version of a result of G. I. Kac, showing that a semisimple Hopf algebra A of dimension p n , where p is a prime and n > 0, over an algebraically closed field of characteristic 0 contains a non-trivial central group-like.As an application we prove …