proposition: Lemma Freeg_enum D : Freeg (fgenum D) = D.
proof: Proof. elim/quotW: D; case=> D rD /=; unlock Freeg. exact/eqmodP/perm_trans/perm_eq_fgrepr/reduceK/prefreeg_reduced. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order generic_quotient) mathcomp(ssralg ssrnum ssrint)