proposition: Lemma nf_inv_tail : forall a b n c , nf (cons a b n c) -> c < [a,b].
proof: Proof. inversion_clear 1. auto with T2. apply psi_relevance;auto with T2. Qed.
imports: EPSILON0 Arith List Omega Compare_dec Relations Wellfounded Max Tools More_nat AccP not_decreasing EPSILON0 More_nat Gamma0_prelude Gamma0_length term rpo