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Mirrors > Home > MPE Home > Th. List > xpsms | Structured version Visualization version GIF version |
Description: A binary product of metric spaces is a metric space. (Contributed by Mario Carneiro, 28-Aug-2015.) |
Ref | Expression |
---|---|
xpsms.t | ⊢ 𝑇 = (𝑅 ×s 𝑆) |
Ref | Expression |
---|---|
xpsms | ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → 𝑇 ∈ MetSp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xpsms.t | . . 3 ⊢ 𝑇 = (𝑅 ×s 𝑆) | |
2 | eqid 2738 | . . 3 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
3 | eqid 2738 | . . 3 ⊢ (Base‘𝑆) = (Base‘𝑆) | |
4 | simpl 482 | . . 3 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → 𝑅 ∈ MetSp) | |
5 | simpr 484 | . . 3 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → 𝑆 ∈ MetSp) | |
6 | eqid 2738 | . . 3 ⊢ (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) = (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) | |
7 | eqid 2738 | . . 3 ⊢ (Scalar‘𝑅) = (Scalar‘𝑅) | |
8 | eqid 2738 | . . 3 ⊢ ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) = ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) | |
9 | 1, 2, 3, 4, 5, 6, 7, 8 | xpsval 17198 | . 2 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → 𝑇 = (◡(𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) “s ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}))) |
10 | 1, 2, 3, 4, 5, 6, 7, 8 | xpsrnbas 17199 | . 2 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → ran (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) = (Base‘((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}))) |
11 | 6 | xpsff1o2 17197 | . . 3 ⊢ (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):((Base‘𝑅) × (Base‘𝑆))–1-1-onto→ran (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) |
12 | f1ocnv 6712 | . . 3 ⊢ ((𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):((Base‘𝑅) × (Base‘𝑆))–1-1-onto→ran (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}) → ◡(𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):ran (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉})–1-1-onto→((Base‘𝑅) × (Base‘𝑆))) | |
13 | 11, 12 | mp1i 13 | . 2 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → ◡(𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉}):ran (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Base‘𝑆) ↦ {〈∅, 𝑥〉, 〈1o, 𝑦〉})–1-1-onto→((Base‘𝑅) × (Base‘𝑆))) |
14 | fvexd 6771 | . . 3 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → (Scalar‘𝑅) ∈ V) | |
15 | 2onn 8433 | . . . 4 ⊢ 2o ∈ ω | |
16 | nnfi 8912 | . . . 4 ⊢ (2o ∈ ω → 2o ∈ Fin) | |
17 | 15, 16 | mp1i 13 | . . 3 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → 2o ∈ Fin) |
18 | xpscf 17193 | . . . 4 ⊢ ({〈∅, 𝑅〉, 〈1o, 𝑆〉}:2o⟶MetSp ↔ (𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp)) | |
19 | 18 | biimpri 227 | . . 3 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → {〈∅, 𝑅〉, 〈1o, 𝑆〉}:2o⟶MetSp) |
20 | 8 | prdsms 23593 | . . 3 ⊢ (((Scalar‘𝑅) ∈ V ∧ 2o ∈ Fin ∧ {〈∅, 𝑅〉, 〈1o, 𝑆〉}:2o⟶MetSp) → ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) ∈ MetSp) |
21 | 14, 17, 19, 20 | syl3anc 1369 | . 2 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → ((Scalar‘𝑅)Xs{〈∅, 𝑅〉, 〈1o, 𝑆〉}) ∈ MetSp) |
22 | 9, 10, 13, 21 | imasf1oms 23552 | 1 ⊢ ((𝑅 ∈ MetSp ∧ 𝑆 ∈ MetSp) → 𝑇 ∈ MetSp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ∅c0 4253 {cpr 4560 〈cop 4564 × cxp 5578 ◡ccnv 5579 ran crn 5581 ⟶wf 6414 –1-1-onto→wf1o 6417 ‘cfv 6418 (class class class)co 7255 ∈ cmpo 7257 ωcom 7687 1oc1o 8260 2oc2o 8261 Fincfn 8691 Basecbs 16840 Scalarcsca 16891 Xscprds 17073 ×s cxps 17134 MetSpcms 23379 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-supp 7949 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fsupp 9059 df-fi 9100 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-icc 13015 df-fz 13169 df-fzo 13312 df-seq 13650 df-hash 13973 df-struct 16776 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-sca 16904 df-vsca 16905 df-ip 16906 df-tset 16907 df-ple 16908 df-ds 16910 df-hom 16912 df-cco 16913 df-rest 17050 df-topn 17051 df-0g 17069 df-gsum 17070 df-topgen 17071 df-pt 17072 df-prds 17075 df-xrs 17130 df-qtop 17135 df-imas 17136 df-xps 17138 df-mre 17212 df-mrc 17213 df-acs 17215 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-submnd 18346 df-mulg 18616 df-cntz 18838 df-cmn 19303 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-top 21951 df-topon 21968 df-topsp 21990 df-bases 22004 df-xms 23381 df-ms 23382 |
This theorem is referenced by: (None) |
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