| Flat2: flat2 → item2 (* non-binding item *)
.
-coercion item2_of_bind2: ∀I:bind2.item2 ≝ Bind2 on _I:bind2 to item2.
+coercion Bind2.
-coercion item2_of_flat2: ∀I:flat2.item2 ≝ Flat2 on _I:flat2 to item2.
+coercion Flat2.
(* Basic properties *********************************************************)