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diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/gr_isd_nexts.ma b/matita/matita/contribs/lambdadelta/ground/relocation/gr_isd_nexts.ma
deleted file mode 100644
index 99a7cf37d..000000000
--- a/matita/matita/contribs/lambdadelta/ground/relocation/gr_isd_nexts.ma
+++ /dev/null
@@ -1,32 +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 "ground/relocation/gr_nexts.ma".
-include "ground/relocation/gr_isd.ma".
-
-(* DIVERGENCE CONDITION FOR GENERIC RELOCATION MAPS *************************)
-
-(* Constructions with gr_nexts **********************************************)
-
-(*** isdiv_nexts *)
-lemma gr_isd_nexts (n) (f): 𝛀❪f❫ → 𝛀❪↑*[n]f❫.
-#n @(nat_ind_succ … n) -n /3 width=3 by gr_isd_next/
-qed.
-
-(* Inversions with gr_nexts *************************************************)
-
-(*** isdiv_inv_nexts *)
-lemma gr_isd_inv_nexts (n) (g): 𝛀❪↑*[n]g❫ → 𝛀❪g❫.
-#n @(nat_ind_succ … n) -n /3 width=3 by gr_isd_inv_next/
-qed-.