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diff --git a/matitaB/matita/contribs/RELATIONAL/NLE/nplus.ma b/matitaB/matita/contribs/RELATIONAL/NLE/nplus.ma
deleted file mode 100644
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--- a/matitaB/matita/contribs/RELATIONAL/NLE/nplus.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 "NLE/defs.ma".
-
-theorem nle_nplus: ∀p, q, r. p ⊕ q ≍ r → q ≤ r.
- intros; elim H; clear H q r; autobatch.
-qed.
-
-axiom nle_nplus_comp: ∀x1,x2,x3. x1 ⊕ x2 ≍ x3 → ∀y1,y2,y3. y1 ⊕ y2 ≍ y3 →
-                      x1 ≤ y1 → x2 ≤ y2 → x3 ≤ y3.
-
-axiom nle_nplus_comp_lt_2: ∀x1,x2,x3. x1 ⊕ x2 ≍ x3 → ∀y1,y2,y3. y1 ⊕ y2 ≍ y3 →
-                           x1 ≤ y1 → x2 < y2 → x3 < y3.