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Mirrors > Home > MPE Home > Th. List > xpsxmet | Structured version Visualization version GIF version |
Description: A product metric of extended metrics is an extended metric. (Contributed by Mario Carneiro, 21-Aug-2015.) |
Ref | Expression |
---|---|
xpsds.t | ⊢ 𝑇 = (𝑅 ×s 𝑆) |
xpsds.x | ⊢ 𝑋 = (Base‘𝑅) |
xpsds.y | ⊢ 𝑌 = (Base‘𝑆) |
xpsds.1 | ⊢ (𝜑 → 𝑅 ∈ 𝑉) |
xpsds.2 | ⊢ (𝜑 → 𝑆 ∈ 𝑊) |
xpsds.p | ⊢ 𝑃 = (dist‘𝑇) |
xpsds.m | ⊢ 𝑀 = ((dist‘𝑅) ↾ (𝑋 × 𝑋)) |
xpsds.n | ⊢ 𝑁 = ((dist‘𝑆) ↾ (𝑌 × 𝑌)) |
xpsds.3 | ⊢ (𝜑 → 𝑀 ∈ (∞Met‘𝑋)) |
xpsds.4 | ⊢ (𝜑 → 𝑁 ∈ (∞Met‘𝑌)) |
Ref | Expression |
---|---|
xpsxmet | ⊢ (𝜑 → 𝑃 ∈ (∞Met‘(𝑋 × 𝑌))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xpsds.t | . . 3 ⊢ 𝑇 = (𝑅 ×s 𝑆) | |
2 | xpsds.x | . . 3 ⊢ 𝑋 = (Base‘𝑅) | |
3 | xpsds.y | . . 3 ⊢ 𝑌 = (Base‘𝑆) | |
4 | xpsds.1 | . . 3 ⊢ (𝜑 → 𝑅 ∈ 𝑉) | |
5 | xpsds.2 | . . 3 ⊢ (𝜑 → 𝑆 ∈ 𝑊) | |
6 | eqid 2759 | . . 3 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) | |
7 | eqid 2759 | . . 3 ⊢ (Scalar‘𝑅) = (Scalar‘𝑅) | |
8 | eqid 2759 | . . 3 ⊢ ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) = ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) | |
9 | 1, 2, 3, 4, 5, 6, 7, 8 | xpsval 16894 | . 2 ⊢ (𝜑 → 𝑇 = (◡(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) “s ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}))) |
10 | 1, 2, 3, 4, 5, 6, 7, 8 | xpsrnbas 16895 | . 2 ⊢ (𝜑 → ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) = (Base‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}))) |
11 | 6 | xpsff1o2 16893 | . . 3 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):(𝑋 × 𝑌)–1-1-onto→ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) |
12 | f1ocnv 6615 | . . 3 ⊢ ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):(𝑋 × 𝑌)–1-1-onto→ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) → ◡(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉})–1-1-onto→(𝑋 × 𝑌)) | |
13 | 11, 12 | mp1i 13 | . 2 ⊢ (𝜑 → ◡(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉})–1-1-onto→(𝑋 × 𝑌)) |
14 | ovexd 7186 | . 2 ⊢ (𝜑 → ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) ∈ V) | |
15 | eqid 2759 | . 2 ⊢ ((dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ↾ (ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) × ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) = ((dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ↾ (ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) × ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) | |
16 | xpsds.p | . 2 ⊢ 𝑃 = (dist‘𝑇) | |
17 | xpsds.m | . . . 4 ⊢ 𝑀 = ((dist‘𝑅) ↾ (𝑋 × 𝑋)) | |
18 | xpsds.n | . . . 4 ⊢ 𝑁 = ((dist‘𝑆) ↾ (𝑌 × 𝑌)) | |
19 | xpsds.3 | . . . 4 ⊢ (𝜑 → 𝑀 ∈ (∞Met‘𝑋)) | |
20 | xpsds.4 | . . . 4 ⊢ (𝜑 → 𝑁 ∈ (∞Met‘𝑌)) | |
21 | 1, 2, 3, 4, 5, 16, 17, 18, 19, 20 | xpsxmetlem 23074 | . . 3 ⊢ (𝜑 → (dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ∈ (∞Met‘ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) |
22 | ssid 3915 | . . 3 ⊢ ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) ⊆ ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) | |
23 | xmetres2 23056 | . . 3 ⊢ (((dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ∈ (∞Met‘ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉})) ∧ ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) ⊆ ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉})) → ((dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ↾ (ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) × ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) ∈ (∞Met‘ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) | |
24 | 21, 22, 23 | sylancl 590 | . 2 ⊢ (𝜑 → ((dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ↾ (ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) × ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) ∈ (∞Met‘ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) |
25 | 9, 10, 13, 14, 15, 16, 24 | imasf1oxmet 23070 | 1 ⊢ (𝜑 → 𝑃 ∈ (∞Met‘(𝑋 × 𝑌))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2112 Vcvv 3410 ⊆ wss 3859 ∅c0 4226 {cpr 4525 〈cop 4529 × cxp 5523 ◡ccnv 5524 ran crn 5526 ↾ cres 5527 –1-1-onto→wf1o 6335 ‘cfv 6336 (class class class)co 7151 ∈ cmpo 7153 1oc1o 8106 Basecbs 16534 Scalarcsca 16619 distcds 16625 Xscprds 16770 ×s cxps 16830 ∞Metcxmet 20144 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-rep 5157 ax-sep 5170 ax-nul 5177 ax-pow 5235 ax-pr 5299 ax-un 7460 ax-cnex 10624 ax-resscn 10625 ax-1cn 10626 ax-icn 10627 ax-addcl 10628 ax-addrcl 10629 ax-mulcl 10630 ax-mulrcl 10631 ax-mulcom 10632 ax-addass 10633 ax-mulass 10634 ax-distr 10635 ax-i2m1 10636 ax-1ne0 10637 ax-1rid 10638 ax-rnegex 10639 ax-rrecex 10640 ax-cnre 10641 ax-pre-lttri 10642 ax-pre-lttrn 10643 ax-pre-ltadd 10644 ax-pre-mulgt0 10645 ax-pre-sup 10646 |
This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2902 df-ne 2953 df-nel 3057 df-ral 3076 df-rex 3077 df-reu 3078 df-rmo 3079 df-rab 3080 df-v 3412 df-sbc 3698 df-csb 3807 df-dif 3862 df-un 3864 df-in 3866 df-ss 3876 df-pss 3878 df-nul 4227 df-if 4422 df-pw 4497 df-sn 4524 df-pr 4526 df-tp 4528 df-op 4530 df-uni 4800 df-int 4840 df-iun 4886 df-iin 4887 df-br 5034 df-opab 5096 df-mpt 5114 df-tr 5140 df-id 5431 df-eprel 5436 df-po 5444 df-so 5445 df-fr 5484 df-se 5485 df-we 5486 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6127 df-ord 6173 df-on 6174 df-lim 6175 df-suc 6176 df-iota 6295 df-fun 6338 df-fn 6339 df-f 6340 df-f1 6341 df-fo 6342 df-f1o 6343 df-fv 6344 df-isom 6345 df-riota 7109 df-ov 7154 df-oprab 7155 df-mpo 7156 df-of 7406 df-om 7581 df-1st 7694 df-2nd 7695 df-supp 7837 df-wrecs 7958 df-recs 8019 df-rdg 8057 df-1o 8113 df-2o 8114 df-oadd 8117 df-er 8300 df-map 8419 df-ixp 8481 df-en 8529 df-dom 8530 df-sdom 8531 df-fin 8532 df-fsupp 8860 df-sup 8932 df-inf 8933 df-oi 9000 df-card 9394 df-pnf 10708 df-mnf 10709 df-xr 10710 df-ltxr 10711 df-le 10712 df-sub 10903 df-neg 10904 df-div 11329 df-nn 11668 df-2 11730 df-3 11731 df-4 11732 df-5 11733 df-6 11734 df-7 11735 df-8 11736 df-9 11737 df-n0 11928 df-z 12014 df-dec 12131 df-uz 12276 df-rp 12424 df-xneg 12541 df-xadd 12542 df-xmul 12543 df-icc 12779 df-fz 12933 df-fzo 13076 df-seq 13412 df-hash 13734 df-struct 16536 df-ndx 16537 df-slot 16538 df-base 16540 df-sets 16541 df-ress 16542 df-plusg 16629 df-mulr 16630 df-sca 16632 df-vsca 16633 df-ip 16634 df-tset 16635 df-ple 16636 df-ds 16638 df-hom 16640 df-cco 16641 df-0g 16766 df-gsum 16767 df-prds 16772 df-xrs 16826 df-imas 16832 df-xps 16834 df-mre 16908 df-mrc 16909 df-acs 16911 df-mgm 17911 df-sgrp 17960 df-mnd 17971 df-submnd 18016 df-mulg 18285 df-cntz 18507 df-cmn 18968 df-xmet 20152 |
This theorem is referenced by: (None) |
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