proposition: Lemma le_inv_nc : forall a b n c n' c', gcons a b n c t2<= gcons a b n' c' -> (n<n')%nat \/ n=n' /\ c t2<= c'.
proof: Proof. inversion_clear 1. injection H0;intros;right;auto with T2. inversion_clear H0; try lt_clean;auto with T2. Qed.
imports: Coq(Arith List Lia Compare_dec Relations Wellfounded RelationClasses) hydras(Epsilon0) hydras(More_Arith Restriction) hydras(ON_Generic) hydras(rpo.term rpo.rpo) hydras(T2) hydras(Compat815)