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diff --git a/matita/matita/contribs/lambda_delta/basic_2/grammar/tstc_vector.ma b/matita/matita/contribs/lambda_delta/basic_2/grammar/tstc_vector.ma
deleted file mode 100644
index 1e35292ef..000000000
--- a/matita/matita/contribs/lambda_delta/basic_2/grammar/tstc_vector.ma
+++ /dev/null
@@ -1,33 +0,0 @@
-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||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/grammar/term_vector.ma".
-include "basic_2/grammar/tstc.ma".
-
-(* SAME TOP TERM CONSTRUCTOR ************************************************)
-
-(* Advanced inversion lemmas ************************************************)
-
-(* Basic_1: was only: iso_flats_lref_bind_false iso_flats_flat_bind_false *)
-lemma tstc_inv_bind_appls_simple: ∀a,I,Vs,V2,T1,T2. ⒶVs.T1 ≃ ⓑ{a,I} V2. T2 →
-                                  𝐒⦃T1⦄ → ⊥.
-#a #I #Vs #V2 #T1 #T2 #H
-elim (tstc_inv_pair2 … H) -H #V0 #T0
-elim Vs -Vs normalize
-[ #H destruct #H
-  @(simple_inv_bind … H)
-| #V #Vs #_ #H destruct
-]
-qed.
-