3
$\begingroup$

How can we show that every automorphism of $S_4$ is an inner automorphism ?

  • 0
    What are the index 4 subgroups of $S_4$?2010-11-04
  • 0
    See https://math.stackexchange.com/questions/880776/operatornameauts-4-is-isomorphic-to-s-42018-10-28

1 Answers 1