(** * One

  - with any arities (n, s)
*)

Definition one_e (n s:nat) : BC :=
  comp n s (comp 0 0 (succ true) nil (zero :: nil)) nil nil.

(* Specifications: *)
Lemma one_correct n s l1 l2: length (sem (one_e n s) l1 l2) = 1.