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 *)

Theorem eq_get_inv : forall A (E F : gen_env A),
(forall x, get x E = get x F) ->
E ≍ F.