proposition: Theorem mult_nf alpha beta : nf alpha -> nf beta -> nf (alpha * beta).
proof: Proof. intros. destruct (L14 H H0); auto. Qed.
imports: Coq(Arith Max Bool Lia Compare_dec Relations Ensembles Wellfounded Bool RelationClasses Operators_Properties ArithRing Logic.Eqdep_dec) hydras(More_Arith Restriction DecPreOrder) hydras(OrdNotations)