proposition: Lemma afixM G H : 'Fix_to(G * H) = 'Fix_to(G) :&: 'Fix_to(H).
proof: Proof. by rewrite afixMin ?subsetT. Qed.
imports: mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat div seq) mathcomp(fintype bigop finset fingroup morphism perm) mathcomp(automorphism quotient)