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diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/gr_after_nat_uni_tls.ma b/matita/matita/contribs/lambdadelta/ground/relocation/gr_after_nat_uni_tls.ma
deleted file mode 100644
index 632d35f6c..000000000
--- a/matita/matita/contribs/lambdadelta/ground/relocation/gr_after_nat_uni_tls.ma
+++ /dev/null
@@ -1,61 +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_tls.ma".
-include "ground/relocation/gr_nat.ma".
-include "ground/relocation/gr_isi_uni.ma".
-include "ground/relocation/gr_after_isi.ma".
-
-(* RELATIONAL COMPOSITION FOR GENERIC RELOCATION MAPS ***********************)
-
-(* Constructions with gr_nat and gr_uni *************************************)
-
-(*** after_uni_dx *)
-lemma gr_after_nat_uni (l2) (l1):
-      ∀f2. @↑❪l1, f2❫ ≘ l2 →
-      ∀f. f2 ⊚ 𝐮❨l1❩ ≘ f → 𝐮❨l2❩ ⊚ ⫰*[l2] f2 ≘ f.
-#l2 @(nat_ind_succ … l2) -l2
-[ #l1 #f2 #Hf2 #f #Hf
-  elim (gr_nat_inv_zero_dx … Hf2) -Hf2 // #g2 #H1 #H2 destruct
-  lapply (gr_after_isi_inv_dx … Hf ?) -Hf
-  /3 width=3 by gr_after_isi_sn, gr_after_eq_repl_back/
-| #l2 #IH #l1 #f2 #Hf2 #f #Hf
-  elim (gr_nat_inv_succ_dx … Hf2) -Hf2 [1,3: * |*: // ]
-  [ #g2 #k1 #Hg2 #H1 #H2 destruct
-    elim (gr_after_inv_push_next … Hf) -Hf [ |*: // ] #g #Hg #H destruct
-    <gr_tls_swap /3 width=5 by gr_after_next/
-  | #g2 #Hg2 #H2 destruct
-    elim (gr_after_inv_next_sn … Hf) -Hf [ |*: // ] #g #Hg #H destruct
-    <gr_tls_swap /3 width=5 by gr_after_next/
-  ]
-]
-qed.
-
-(*** after_uni_sn *)
-lemma gr_nat_after_uni_tls (l2) (l1):
-      ∀f2. @↑❪l1, f2❫ ≘ l2 →
-      ∀f. 𝐮❨l2❩ ⊚ ⫰*[l2] f2 ≘ f → f2 ⊚ 𝐮❨l1❩ ≘ f.
-#l2 @(nat_ind_succ … l2) -l2
-[ #l1 #f2 #Hf2 #f #Hf
-  elim (gr_nat_inv_zero_dx … Hf2) -Hf2 // #g2 #H1 #H2 destruct
-  lapply (gr_after_isi_inv_sn … Hf ?) -Hf
-  /3 width=3 by gr_after_isi_dx, gr_after_eq_repl_back/
-| #l2 #IH #l1 #f2 #Hf2 #f #Hf
-  elim (gr_after_inv_next_sn … Hf) -Hf [2,3: // ] #g #Hg #H destruct
-  elim (gr_nat_inv_succ_dx … Hf2) -Hf2 [1,3: * |*: // ]
-  [ #g2 #k1 #Hg2 #H1 #H2 destruct /3 width=7 by gr_after_push/
-  | #g2 #Hg2 #H2 destruct /3 width=5 by gr_after_next/
-  ]
-]
-qed-.