--- /dev/null
+(**************************************************************************)
+(* ___ *)
+(* ||M|| *)
+(* ||A|| A project by Andrea Asperti *)
+(* ||T|| *)
+(* ||I|| Developers: *)
+(* ||T|| The HELM team. *)
+(* ||A|| http://helm.cs.unibo.it *)
+(* \ / *)
+(* \ / This file is distributed under the terms of the *)
+(* v GNU General Public License Version 2 *)
+(* *)
+(**************************************************************************)
+
+set "baseuri" "cic:/matita/RELATIONAL/NLE/defs".
+
+include "Nat/defs.ma".
+
+inductive NLE: Nat \to Nat \to Prop \def
+ | NLE_zero: \forall q. NLE zero q
+ | NLE_succ: \forall p,q. NLE p q \to NLE (succ p) (succ q).