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diff --git a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cnu_cnr.ma b/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cnu_cnr.ma
deleted file mode 100644
index ce295d3ed..000000000
--- a/matita/matita/contribs/lambdadelta/basic_2/rt_transition/cnu_cnr.ma
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@@ -1,37 +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 "basic_2/rt_transition/cnr.ma".
-include "basic_2/rt_transition/cnu.ma".
-
-(* NORMAL TERMS FOR T-UNUNBOUND RT-TRANSITION *******************************)
-
-(* Advanced properties with normal terms for r-transition *******************)
-
-lemma cnu_abst (h) (p) (G) (L):
-      ∀W. ⦃G,L⦄ ⊢ ➡[h] 𝐍⦃W⦄ → ∀T.⦃G,L.ⓛW⦄ ⊢ ⥲[h] 𝐍⦃T⦄ → ⦃G,L⦄ ⊢ ⥲[h] 𝐍⦃ⓛ{p}W.T⦄.
-#h #p #G #L #W1 #HW1 #T1 #HT1 #n #X #H
-elim (cpm_inv_abst1 … H) -H #W2 #T2 #HW12 #HT12 #H destruct
-<(HW1 … HW12) -W2 /3 width=2 by tueq_bind/
-qed.
-
-lemma cnu_abbr_neg (h) (G) (L):
-      ∀V. ⦃G,L⦄ ⊢ ➡[h] 𝐍⦃V⦄ → ∀T.⦃G,L.ⓓV⦄ ⊢ ⥲[h] 𝐍⦃T⦄ → ⦃G,L⦄ ⊢ ⥲[h] 𝐍⦃-ⓓV.T⦄.
-#h #G #L #V1 #HV1 #T1 #HT1 #n #X #H
-elim (cpm_inv_abbr1 … H) -H *
-[ #V2 #T2 #HV12 #HT12 #H destruct
-  <(HV1 … HV12) -V2 /3 width=2 by tueq_bind/
-| #X1 #_ #_ #H destruct
-]
-qed.