proposition: Lemma gamma_positive : gamma <> zero.
proof: Proof. generalize R19; intro. generalize Hpos;intro. intro H0; rewrite H0 in H. assert (zero t1< zero). apply LT_LE_trans with beta;auto. eapply LT_irrefl; eauto. Qed.
imports: hydras(DecPreOrder Canon MoreLists First_toggle OrdNotations) Coq(Lia)