proposition: Lemma equal_2 : equal cmp m m' = true -> Equivb cmp m m'.
proof: Proof. unfold Equivb; rewrite Equiv_iff; t. Qed.
imports: Coq.PArith.BinPos Coq.PArith.Pnat Coq.Arith.Arith Coq.FSets.FMapInterface Coq.FSets.FMapPositive Fiat.Parsers.ContextFreeGrammar.Carriers Fiat.Common.List.ListFacts Fiat.Common.List.ListMorphisms Fiat.Common.Prod