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diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/gr_map.ma b/matita/matita/contribs/lambdadelta/ground/relocation/gr_map.ma
deleted file mode 100644
index 53d052062..000000000
--- a/matita/matita/contribs/lambdadelta/ground/relocation/gr_map.ma
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@@ -1,69 +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/notation/functions/upspoon_1.ma".
-include "ground/notation/functions/uparrow_1.ma".
-include "ground/lib/stream.ma".
-include "ground/lib/bool.ma".
-
-(* GENERIC RELOCATION MAPS **************************************************)
-
-(*** rtmap *)
-definition gr_map: Type[0] ≝ stream bool.
-
-(*** push *)
-definition gr_push (f): gr_map ≝ Ⓕ⨮f.
-
-interpretation
-  "push (generic relocation maps)"
-  'UpSpoon f = (gr_push f).
-
-(*** next *)
-definition gr_next (f): gr_map ≝ Ⓣ⨮f.
-
-interpretation
-  "next (generic relocation maps)"
-  'UpArrow f = (gr_next f).
-
-(* Basic constructions (specific) *******************************************)
-
-(*** push_rew *)
-lemma gr_push_unfold (f): Ⓕ⨮f = ⫯f.
-// qed.
-
-(*** next_rew *)
-lemma gr_next_unfold (f): Ⓣ⨮f = ↑f.
-// qed.
-
-(* Basic inversions *********************************************************)
-
-(*** injective_push *)
-lemma eq_inv_gr_push_bi: injective ? ? gr_push.
-#f1 #f2 <gr_push_unfold <gr_push_unfold #H destruct //
-qed-.
-
-(*** discr_push_next *)
-lemma eq_inv_gr_push_next (f1) (f2): ⫯f1 = ↑f2 → ⊥.
-#f1 #f2 <gr_push_unfold <gr_next_unfold #H destruct
-qed-.
-
-(*** discr_next_push *)
-lemma eq_inv_gr_next_push (f1) (f2): ↑f1 = ⫯f2 → ⊥.
-#f1 #f2 <gr_next_unfold <gr_push_unfold #H destruct
-qed-.
-
-(*** injective_next *)
-lemma eq_inv_gr_next_bi: injective ? ? gr_next.
-#f1 #f2 <gr_next_unfold <gr_next_unfold #H destruct //
-qed-.