(* *)
(**************************************************************************)
-set "baseuri" "cic:/matita/nat/nat".
-
include "higher_order_defs/functions.ma".
+theorem esempio: \forall A,B,C:Prop.(A \to B \to C) \to (A \to B)
+\to A \to C.
+
+
+
inductive nat : Set \def
| O : nat
| S : nat \to nat.