proposition: Lemma nfb_proof_unicity : forall (alpha:T2) (H H': nfb alpha), H = H'.
proof: Proof. intros; red in H, H'; apply Eqdep_dec.eq_proofs_unicity_on. decide equality. 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)