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diff --git a/helm/software/matita/contribs/CoRN-Decl/model/semigroups/QSpossemigroup.ma b/helm/software/matita/contribs/CoRN-Decl/model/semigroups/QSpossemigroup.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                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+(* This file was automatically generated: do not edit *********************)
+
+set "baseuri" "cic:/matita/CoRN-Decl/model/semigroups/QSpossemigroup".
+
+(* $Id: QSpossemigroup.v,v 1.5 2004/04/08 08:20:35 lcf Exp $ *)
+
+(* INCLUDE
+Qpossetoid
+*)
+
+(* INCLUDE
+CSemiGroups
+*)
+
+(*#* **Example of a semi-group: $\langle$#⟨#[Qpos],$(x,y) \mapsto xy/2$#(x,y) ↦ xy/2#$\rangle$#⟩#
+The positive rationals form with the operation
+$(x,y) \mapsto xy/2$#(x,y) ↦ xy/2# a CSemiGroup.
+*)
+
+inline cic:/CoRN/model/semigroups/QSpossemigroup/Qpos_multdiv2_as_CSemiGroup.con.
+