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diff --git a/matita/matita/contribs/lambdadelta/basic_2/static/fdeq_fqup.ma b/matita/matita/contribs/lambdadelta/basic_2/static/fdeq_fqup.ma
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--- a/matita/matita/contribs/lambdadelta/basic_2/static/fdeq_fqup.ma
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-(**************************************************************************)
-(*       ___                                                              *)
-(*      ||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/static/rdeq_fqup.ma".
-include "basic_2/static/fdeq.ma".
-
-(* DEGREE-BASED EQUIVALENCE FOR CLOSURES ON REFERRED ENTRIES ****************)
-
-(* Properties with degree-based equivalence for terms ***********************)
-
-lemma tdeq_fdeq: ∀h,o,T1,T2. T1 ≛[h, o] T2 →
-                 ∀G,L. ⦃G, L, T1⦄ ≛[h, o] ⦃G, L, T2⦄.
-/2 width=1 by fdeq_intro_sn/ qed.
-
-(* Advanced properties ******************************************************)
-
-lemma fdeq_refl: ∀h,o. tri_reflexive … (fdeq h o).
-/2 width=1 by fdeq_intro_sn/ qed.