proposition: Lemma nf_coeff_irrelevance : forall a b n n' c, nf (gcons a b n c) -> nf (gcons a b n' c).
proof: Proof. inversion_clear 1; constructor;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)