proposition: Lemma T1mul_not_monotonous : exists a b c : T1, c <> zero /\ a t1< b /\ a * c = b * c.
proof: Proof. exists 3, 5, T1omega; split; [discriminate| now compute]. 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)