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diff --git a/matita/matita/contribs/lambda_delta/basic_2/unfold/lifts_vector.ma b/matita/matita/contribs/lambda_delta/basic_2/unfold/lifts_vector.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                  *)
-(*                                                                        *)
-(**************************************************************************)
-
-include "basic_2/substitution/lift_vector.ma".
-include "basic_2/unfold/lifts.ma".
-
-(* GENERIC TERM VECTOR RELOCATION *******************************************)
-
-inductive liftsv (des:list2 nat nat) : relation (list term) ≝
-| liftsv_nil : liftsv des ◊ ◊
-| liftsv_cons: ∀T1s,T2s,T1,T2.
-               ⇧*[des] T1 ≡ T2 → liftsv des T1s T2s →
-               liftsv des (T1 @ T1s) (T2 @ T2s)
-.
-
-interpretation "generic relocation (vector)"
-   'RLiftStar des T1s T2s = (liftsv des T1s T2s).
-
-(* Basic inversion lemmas ***************************************************)
-
-(* Basic_1: was: lifts1_flat (left to right) *)
-lemma lifts_inv_applv1: ∀V1s,U1,T2,des. ⇧*[des] Ⓐ V1s. U1 ≡ T2 →
-                        ∃∃V2s,U2. ⇧*[des] V1s ≡ V2s & ⇧*[des] U1 ≡ U2 &
-                                  T2 = Ⓐ V2s. U2.
-#V1s elim V1s -V1s normalize
-[ #T1 #T2 #des #HT12
-  @(ex3_2_intro) [3,4: // |1,2: skip | // ] (**) (* explicit constructor *)
-| #V1 #V1s #IHV1s #T1 #X #des #H
-  elim (lifts_inv_flat1 … H) -H #V2 #Y #HV12 #HY #H destruct
-  elim (IHV1s … HY) -IHV1s -HY #V2s #T2 #HV12s #HT12 #H destruct
-  @(ex3_2_intro) [4: // |3: /2 width=2/ |1,2: skip | // ] (**) (* explicit constructor *)
-]
-qed-.
-
-(* Basic properties *********************************************************)
-
-(* Basic_1: was: lifts1_flat (right to left) *)
-lemma lifts_applv: ∀V1s,V2s,des. ⇧*[des] V1s ≡ V2s →
-                   ∀T1,T2. ⇧*[des] T1 ≡ T2 →
-                   ⇧*[des] Ⓐ V1s. T1 ≡ Ⓐ V2s. T2.
-#V1s #V2s #des #H elim H -V1s -V2s // /3 width=1/
-qed.