Section Properties.
Implicit Types x y : TVar.
Implicit Types xs ys : list TVar.
(* ---------------------------------------------------------------------- *)
(** **** Abstract properties of ok *)
(* ---------------------------------------------------------------------- *)
(** **** Properties of binds *)
(* ---------------------------------------------------------------------- *)
(** **** Properties of all_binds *)

(** All_Binds and map. *)
Theorem all_binds_map : forall A B (f : A -> B) (E F : gen_env A),
E ⊏ F ->
map f E ⊏ map f F.