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

(** Decidability of eq. *)
Theorem eq_dec : forall A (E F : gen_env A),
(forall w w' : A, { w = w' } + { ¬ w = w' }) ->
ok E -> ok F ->
{ E ≍ F } + { ¬ E ≍ F }.