1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
13 (**************************************************************************)
15 (* This file was automatically generated: do not edit *********************)
17 set "baseuri" "cic:/matita/CoRN-Decl/metrics/Prod_Sub".
21 (* $Id: Prod_Sub.v,v 1.4 2004/04/23 10:01:02 lcf Exp $ *)
23 include "metrics/IR_CPMSpace.ma".
26 Section prodpsmetrics.
29 (*#* **Product-Pseudo-Metric-Spaces
33 The product metric here defined is:
34 $ d_{prod}((a_1,b_1),(a_2,b_2)):= d_A(a_1,a_2)+d_B(b_1,b_2)$
35 # 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>)#.
36 This is %\emph{not}% #<I>not</I># the one used to make the metric of
37 $\RR^{2}$ #IR<SUP>2</SUP># out of the metric of $\RR$ #IR#.
40 inline "cic:/CoRN/metrics/Prod_Sub/dprod0.con".
42 inline "cic:/CoRN/metrics/Prod_Sub/dprod0_strext.con".
44 inline "cic:/CoRN/metrics/Prod_Sub/d_prod0.con".
46 inline "cic:/CoRN/metrics/Prod_Sub/prod0cpsmetricspace_is_CPsMetricSpace.con".
48 inline "cic:/CoRN/metrics/Prod_Sub/Prod0CPsMetricSpace.con".
58 (*#* **Sub-Pseudo-Metric-Spaces
62 The pseudo metric on a subspace $Y$ #Y# of a pseudo metric space $X$ #X# is
63 the pseudo metric on $X$ #X# restricted to $Y$ #Y#.
66 inline "cic:/CoRN/metrics/Prod_Sub/restr_bin_fun.con".
69 Implicit Arguments restr_bin_fun [X].
72 inline "cic:/CoRN/metrics/Prod_Sub/restr_bin_fun'.con".
75 Implicit Arguments restr_bin_fun' [X].
78 inline "cic:/CoRN/metrics/Prod_Sub/restr_bin_fun_strext.con".
80 inline "cic:/CoRN/metrics/Prod_Sub/Build_SubCSetoid_bin_fun.con".
82 inline "cic:/CoRN/metrics/Prod_Sub/dsub.con".
85 Implicit Arguments dsub [X].
88 inline "cic:/CoRN/metrics/Prod_Sub/dsub_com.con".
90 inline "cic:/CoRN/metrics/Prod_Sub/dsub_nneg.con".
92 inline "cic:/CoRN/metrics/Prod_Sub/dsub_pos_imp_ap.con".
94 inline "cic:/CoRN/metrics/Prod_Sub/dsub_tri_ineq.con".
96 inline "cic:/CoRN/metrics/Prod_Sub/is_SubPsMetricSpace.con".
98 inline "cic:/CoRN/metrics/Prod_Sub/SubPsMetricSpace.con".
101 Implicit Arguments SubPsMetricSpace [X].
104 inline "cic:/CoRN/metrics/Prod_Sub/from_SubPsMetricSpace.con".
107 The function [dsub'] is used in the definition of %''located''% #"located"#.
108 It enables one to speak about a distance between an element of a
109 pseudo metric space and a certain subspace.
112 inline "cic:/CoRN/metrics/Prod_Sub/dsub'.con".
115 Implicit Arguments dsub' [X].
118 inline "cic:/CoRN/metrics/Prod_Sub/dsub'_strext.con".
120 inline "cic:/CoRN/metrics/Prod_Sub/dsub'_as_cs_fun.con".
123 Implicit Arguments dsub'_as_cs_fun [X].
126 inline "cic:/CoRN/metrics/Prod_Sub/dsub'_uni_continuous''.con".