proposition: Lemma solvable1 : solvable [1 gT].
proof: Proof. exact: abelian_sol (abelian1 gT). Qed.
imports: mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq path) mathcomp(fintype div bigop prime finset fingroup morphism) mathcomp(automorphism quotient commutator gproduct) mathcomp(gfunctor center gseries cyclic)