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diff --git a/matita/matita/contribs/lambdadelta/ground_2/insert_eq/insert_eq_0.ma b/matita/matita/contribs/lambdadelta/ground_2/insert_eq/insert_eq_0.ma
new file mode 100644
index 000000000..6a3788e7d
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/ground_2/insert_eq/insert_eq_0.ma
@@ -0,0 +1,20 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||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 "basics/relations.ma".
+
+(* GENERATED LIBRARY ********************************************************)
+
+lemma insert_eq_0: ∀A,a. ∀Q1,Q2:predicate A. (∀a0. Q1 a0 → a = a0 → Q2 a0) → Q1 a → Q2 a.
+/2 width=1 by/ qed-.