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diff --git a/matita/contribs/CoRN-Decl/devel/loeb/per/csetfun.ma b/matita/contribs/CoRN-Decl/devel/loeb/per/csetfun.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/devel/loeb/per/csetfun".
+
+include "CoRN.ma".
+
+include "algebra/CSetoids.ma".
+
+include "algebra/CSetoidFun.ma".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/ap_fun.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/eq_fun.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/irrefl_apfun.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/cotrans_apfun.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/ta_apfun.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/sym_apfun.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/FS_is_CSetoid.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/FS_as_CSetoid.con".
+
+(* UNEXPORTED
+Print associative.
+*)
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/comp.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/comp_as_bin_op.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/assoc_comp.con".
+
+include "algebra/CSemiGroups.ma".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/FS_as_CSemiGroup.con".
+
+include "algebra/CMonoids.ma".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/FS_id.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/id_is_rht_unit.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/id_is_lft_unit.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/FS_is_CMonoid.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/FS_as_CMonoid.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/PS_as_CMonoid.con".
+
+include "algebra/CGroups.ma".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/Inv_is_bij.con".
+
+(* Lemma Inv_is_bij :
+ forall (A B : CSetoid) (f : CSetoid_fun A B) (H : bijective f),
+ bijective (Inv f H).
+intros A B f.
+case f.
+unfold fun_strext in |- *.
+intros f0 H5.
+unfold bijective in |- *.
+intro H.
+elim H.
+clear H.
+unfold injective in |- *.
+unfold surjective in |- *.
+intros H0 H1.
+split.
+unfold Inv in |- *.
+simpl in |- *.
+unfold invfun in |- *.
+simpl in |- *.
+unfold sigT_rect in |- *.
+intros a0 a1 H2.
+case H1.
+case (H1 a1).
+intros x H3 y H4.
+simpl in H3.
+simpl in H4.
+simpl in H0.
+simpl in H1.
+apply H5.
+astepl a0.
+astepr a1.
+exact H2.
+
+simpl in |- *.
+unfold invfun in |- *.
+simpl in |- *.
+unfold sigT_rect in |- *.
+intros b.
+exists (f0 b).
+case (H1 (f0 b)).
+simpl in |- *.
+intros x H2.
+simpl in H0.
+simpl in H1.
+apply not_ap_imp_eq.
+red in |- *.
+intro H3.
+set (H4 := H0 x b H3) in *.
+set (H6 := ap_imp_neq B (f0 x) (f0 b) H4) in *.
+intuition.
+Qed.*)
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/PS_Inv.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/Inv_as_un_op.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/PS_is_CGroup.con".
+
+inline "cic:/CoRN/devel/loeb/per/csetfun/PS_as_CGroup.con".
+
+(* In het algemeen niet Abels! *)
+