proposition: Lemma FrobeniusWcompl : [Frobenius G with complement H].
proof: Proof. by case/andP: frobG. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div) mathcomp(fintype bigop prime finset fingroup morphism) mathcomp(perm action quotient gproduct cyclic center) mathcomp(pgroup nilpotent sylow hall abelian)