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diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_guard.ma b/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_guard.ma
deleted file mode 100644
index bdf843577..000000000
--- a/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_guard.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 "delayed_updating/unwind/unwind2_rmap.ma".
-include "delayed_updating/syntax/path_guard.ma".
-include "ground/relocation/nap.ma".
-
-(* TAILED UNWIND FOR RELOCATION MAP *****************************************)
-
-(* Destructions with pgc ****************************************************)
-
-lemma unwind2_rmap_push_guard (f) (p):
-      p ϵ 𝐆 → ⫯⇂▶[⫯f]p = ▶[⫯f]p.
-#f #p * //
-qed-.
-
-lemma nap_zero_unwind2_rmap_push_guard (f) (p):
-      p ϵ 𝐆 → 𝟎 = ▶[⫯f]p＠§❨𝟎❩.
-#f #p #Hp
-<(unwind2_rmap_push_guard … Hp) -Hp //
-qed-.