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diff --git a/matita/contribs/LAMBDA-TYPES/LambdaDelta-1/T/defs.ma b/matita/contribs/LAMBDA-TYPES/LambdaDelta-1/T/defs.ma
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+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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 "LambdaDelta-1/preamble.ma".
+
+inductive B: Set \def
+| Abbr: B
+| Abst: B
+| Void: B.
+
+inductive F: Set \def
+| Appl: F
+| Cast: F.
+
+inductive K: Set \def
+| Bind: B \to K
+| Flat: F \to K.
+
+inductive T: Set \def
+| TSort: nat \to T
+| TLRef: nat \to T
+| THead: K \to (T \to (T \to T)).
+
+definition tweight:
+ T \to nat
+\def
+ let rec tweight (t: T) on t: nat \def (match t with [(TSort _) \Rightarrow 
+(S O) | (TLRef _) \Rightarrow (S O) | (THead _ u t0) \Rightarrow (S (plus 
+(tweight u) (tweight t0)))]) in tweight.
+