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diff --git a/matita/matita/contribs/lambdadelta/basic_1A/lift1/defs.ma b/matita/matita/contribs/lambdadelta/basic_1A/lift1/defs.ma
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@@ -0,0 +1,31 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+(* This file was automatically generated: do not edit *********************)
+
+include "basic_1A/lift/defs.ma".
+
+rec definition trans (hds: PList) on hds: nat \to nat \def \lambda (i: 
+nat).(match hds with [PNil \Rightarrow i | (PCons h d hds0) \Rightarrow (let 
+j \def (trans hds0 i) in (match (blt j d) with [true \Rightarrow j | false 
+\Rightarrow (plus j h)]))]).
+
+rec definition lift1 (hds: PList) on hds: T \to T \def \lambda (t: T).(match 
+hds with [PNil \Rightarrow t | (PCons h d hds0) \Rightarrow (lift h d (lift1 
+hds0 t))]).
+
+rec definition lifts1 (hds: PList) (ts: TList) on ts: TList \def match ts 
+with [TNil \Rightarrow TNil | (TCons t ts0) \Rightarrow (TCons (lift1 hds t) 
+(lifts1 hds ts0))].
+