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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 2821 | . . 3 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) | |
7 | eqid 2821 | . . 3 ⊢ (Scalar‘𝑅) = (Scalar‘𝑅) | |
8 | eqid 2821 | . . 3 ⊢ ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) = ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) | |
9 | 1, 2, 3, 4, 5, 6, 7, 8 | xpsval 16837 | . 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 16838 | . 2 ⊢ (𝜑 → ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) = (Base‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}))) |
11 | 6 | xpsff1o2 16836 | . . 3 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):(𝑋 × 𝑌)–1-1-onto→ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) |
12 | f1ocnv 6622 | . . 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 7185 | . 2 ⊢ (𝜑 → ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) ∈ V) | |
15 | eqid 2821 | . 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 22983 | . . 3 ⊢ (𝜑 → (dist‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉})) ∈ (∞Met‘ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}))) |
22 | ssid 3989 | . . 3 ⊢ ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) ⊆ ran (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) | |
23 | xmetres2 22965 | . . 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 588 | . 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 22979 | 1 ⊢ (𝜑 → 𝑃 ∈ (∞Met‘(𝑋 × 𝑌))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1533 ∈ wcel 2110 Vcvv 3495 ⊆ wss 3936 ∅c0 4291 {cpr 4563 〈cop 4567 × cxp 5548 ◡ccnv 5549 ran crn 5551 ↾ cres 5552 –1-1-onto→wf1o 6349 ‘cfv 6350 (class class class)co 7150 ∈ cmpo 7152 1oc1o 8089 Basecbs 16477 Scalarcsca 16562 distcds 16568 Xscprds 16713 ×s cxps 16773 ∞Metcxmet 20524 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 ax-pre-sup 10609 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4833 df-int 4870 df-iun 4914 df-iin 4915 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5455 df-eprel 5460 df-po 5469 df-so 5470 df-fr 5509 df-se 5510 df-we 5511 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-pred 6143 df-ord 6189 df-on 6190 df-lim 6191 df-suc 6192 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-isom 6359 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-of 7403 df-om 7575 df-1st 7683 df-2nd 7684 df-supp 7825 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-1o 8096 df-2o 8097 df-oadd 8100 df-er 8283 df-map 8402 df-ixp 8456 df-en 8504 df-dom 8505 df-sdom 8506 df-fin 8507 df-fsupp 8828 df-sup 8900 df-inf 8901 df-oi 8968 df-card 9362 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-div 11292 df-nn 11633 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-z 11976 df-dec 12093 df-uz 12238 df-rp 12384 df-xneg 12501 df-xadd 12502 df-xmul 12503 df-icc 12739 df-fz 12887 df-fzo 13028 df-seq 13364 df-hash 13685 df-struct 16479 df-ndx 16480 df-slot 16481 df-base 16483 df-sets 16484 df-ress 16485 df-plusg 16572 df-mulr 16573 df-sca 16575 df-vsca 16576 df-ip 16577 df-tset 16578 df-ple 16579 df-ds 16581 df-hom 16583 df-cco 16584 df-0g 16709 df-gsum 16710 df-prds 16715 df-xrs 16769 df-imas 16775 df-xps 16777 df-mre 16851 df-mrc 16852 df-acs 16854 df-mgm 17846 df-sgrp 17895 df-mnd 17906 df-submnd 17951 df-mulg 18219 df-cntz 18441 df-cmn 18902 df-xmet 20532 |
This theorem is referenced by: (None) |
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