proposition: Lemma nf_fin_inv : forall gamma n, nf (gcons zero zero n gamma) -> gamma = zero.
proof: Proof. inversion 1;auto with T2. inversion H4; 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)