From Undecidability.L.Computability Require Export Fixpoints Decidability Seval.
From Undecidability.L.Functions Require Export Proc Encoding.
(* * Scott's Theorem *)
(* * Applications of Scott's Theorem *)
Goal ~ ldec (fun x => closed x /\ converges x).

Lemma Eq_ldec : ~ ldec (fun x => exists (s t : term), x = enc (s t) /\ s == t).