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diff --git a/helm/software/matita/contribs/CoRN-Decl/metrics/Prod_Sub.ma b/helm/software/matita/contribs/CoRN-Decl/metrics/Prod_Sub.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/metrics/Prod_Sub".
+
+(* $Id: Prod_Sub.v,v 1.4 2004/04/23 10:01:02 lcf Exp $ *)
+
+(* INCLUDE
+IR_CPMSpace
+*)
+
+(* UNEXPORTED
+Section prodpsmetrics.
+*)
+
+(*#* **Product-Pseudo-Metric-Spaces
+*)
+
+(*#*
+The product metric here defined is:
+$ d_{prod}((a_1,b_1),(a_2,b_2)):= d_A(a_1,a_2)+d_B(b_1,b_2)$
+# d<SUB>prod</SUB>((a<SUB>1</SUB>,b<SUB>1</SUB>),(a<SUB>2</SUB>,b<SUB>2</SUB>)):= d<SUB>A</SUB>(a<SUB>1</SUB>,b<SUB>1</SUB>)+d<SUB>B</SUB>(b<SUB>1</SUB>,b<SUB>2</SUB>)#.
+This is %\emph{not}% #<I>not</I># the one used to make the metric of 
+$\RR^{2}$ #IR<SUP>2</SUP># out of the metric of $\RR$ #IR#. 
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/dprod0.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/dprod0_strext.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/d_prod0.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/prod0cpsmetricspace_is_CPsMetricSpace.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/Prod0CPsMetricSpace.con.
+
+(* UNEXPORTED
+End prodpsmetrics.
+*)
+
+(* UNEXPORTED
+Section subpsmetrics.
+*)
+
+(*#* **Sub-Pseudo-Metric-Spaces
+*)
+
+(*#*
+The pseudo metric on a subspace $Y$ #Y# of a pseudo metric space $X$ #X# is 
+the pseudo metric on $X$ #X# restricted to $Y$ #Y#.
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/restr_bin_fun.con.
+
+(* UNEXPORTED
+Implicit Arguments restr_bin_fun [X].
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/restr_bin_fun'.con.
+
+(* UNEXPORTED
+Implicit Arguments restr_bin_fun' [X].
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/restr_bin_fun_strext.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/Build_SubCSetoid_bin_fun.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub.con.
+
+(* UNEXPORTED
+Implicit Arguments dsub [X].
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub_com.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub_nneg.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub_pos_imp_ap.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub_tri_ineq.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/is_SubPsMetricSpace.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/SubPsMetricSpace.con.
+
+(* UNEXPORTED
+Implicit Arguments SubPsMetricSpace [X].
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/from_SubPsMetricSpace.con.
+
+(*#*
+The function [dsub'] is used in the definition of %''located''% #"located"#. 
+It enables one to speak about a distance between an element of a 
+pseudo metric space and a certain subspace.
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub'.con.
+
+(* UNEXPORTED
+Implicit Arguments dsub' [X].
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub'_strext.con.
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub'_as_cs_fun.con.
+
+(* UNEXPORTED
+Implicit Arguments dsub'_as_cs_fun [X].
+*)
+
+inline cic:/CoRN/metrics/Prod_Sub/dsub'_uni_continuous''.con.
+
+(* UNEXPORTED
+End subpsmetrics.
+*)
+