proposition: Lemma gencongr_imply r1 r2 : Generated_EquivCongruence r1 -> Generated_EquivCongruence r2 -> forall x y, r1 x y -> r2 x y.
proof: Proof. Proof using. by case=> Heq1 Hc1 Hr1 Hmin1; case=> Heq2 Hc2 Hr2 _; exact: Hmin1. Qed.
imports: HB(structures) mathcomp(all_ssreflect) Recdef permcomp permuted multinomial vectNK