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Mirrors > Home > MPE Home > Th. List > imasf1oms | Structured version Visualization version GIF version |
Description: The image of a metric space is a metric space. (Contributed by Mario Carneiro, 28-Aug-2015.) |
Ref | Expression |
---|---|
imasf1obl.u | ⊢ (𝜑 → 𝑈 = (𝐹 “s 𝑅)) |
imasf1obl.v | ⊢ (𝜑 → 𝑉 = (Base‘𝑅)) |
imasf1obl.f | ⊢ (𝜑 → 𝐹:𝑉–1-1-onto→𝐵) |
imasf1oms.r | ⊢ (𝜑 → 𝑅 ∈ MetSp) |
Ref | Expression |
---|---|
imasf1oms | ⊢ (𝜑 → 𝑈 ∈ MetSp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imasf1obl.u | . . 3 ⊢ (𝜑 → 𝑈 = (𝐹 “s 𝑅)) | |
2 | imasf1obl.v | . . 3 ⊢ (𝜑 → 𝑉 = (Base‘𝑅)) | |
3 | imasf1obl.f | . . 3 ⊢ (𝜑 → 𝐹:𝑉–1-1-onto→𝐵) | |
4 | imasf1oms.r | . . . 4 ⊢ (𝜑 → 𝑅 ∈ MetSp) | |
5 | msxms 23607 | . . . 4 ⊢ (𝑅 ∈ MetSp → 𝑅 ∈ ∞MetSp) | |
6 | 4, 5 | syl 17 | . . 3 ⊢ (𝜑 → 𝑅 ∈ ∞MetSp) |
7 | 1, 2, 3, 6 | imasf1oxms 23645 | . 2 ⊢ (𝜑 → 𝑈 ∈ ∞MetSp) |
8 | eqid 2738 | . . . . 5 ⊢ ((dist‘𝑅) ↾ (𝑉 × 𝑉)) = ((dist‘𝑅) ↾ (𝑉 × 𝑉)) | |
9 | eqid 2738 | . . . . 5 ⊢ (dist‘𝑈) = (dist‘𝑈) | |
10 | eqid 2738 | . . . . . . . 8 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
11 | eqid 2738 | . . . . . . . 8 ⊢ ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅))) = ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅))) | |
12 | 10, 11 | msmet 23610 | . . . . . . 7 ⊢ (𝑅 ∈ MetSp → ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅))) ∈ (Met‘(Base‘𝑅))) |
13 | 4, 12 | syl 17 | . . . . . 6 ⊢ (𝜑 → ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅))) ∈ (Met‘(Base‘𝑅))) |
14 | 2 | sqxpeqd 5621 | . . . . . . 7 ⊢ (𝜑 → (𝑉 × 𝑉) = ((Base‘𝑅) × (Base‘𝑅))) |
15 | 14 | reseq2d 5891 | . . . . . 6 ⊢ (𝜑 → ((dist‘𝑅) ↾ (𝑉 × 𝑉)) = ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅)))) |
16 | 2 | fveq2d 6778 | . . . . . 6 ⊢ (𝜑 → (Met‘𝑉) = (Met‘(Base‘𝑅))) |
17 | 13, 15, 16 | 3eltr4d 2854 | . . . . 5 ⊢ (𝜑 → ((dist‘𝑅) ↾ (𝑉 × 𝑉)) ∈ (Met‘𝑉)) |
18 | 1, 2, 3, 4, 8, 9, 17 | imasf1omet 23529 | . . . 4 ⊢ (𝜑 → (dist‘𝑈) ∈ (Met‘𝐵)) |
19 | f1ofo 6723 | . . . . . . 7 ⊢ (𝐹:𝑉–1-1-onto→𝐵 → 𝐹:𝑉–onto→𝐵) | |
20 | 3, 19 | syl 17 | . . . . . 6 ⊢ (𝜑 → 𝐹:𝑉–onto→𝐵) |
21 | 1, 2, 20, 4 | imasbas 17223 | . . . . 5 ⊢ (𝜑 → 𝐵 = (Base‘𝑈)) |
22 | 21 | fveq2d 6778 | . . . 4 ⊢ (𝜑 → (Met‘𝐵) = (Met‘(Base‘𝑈))) |
23 | 18, 22 | eleqtrd 2841 | . . 3 ⊢ (𝜑 → (dist‘𝑈) ∈ (Met‘(Base‘𝑈))) |
24 | ssid 3943 | . . 3 ⊢ (Base‘𝑈) ⊆ (Base‘𝑈) | |
25 | metres2 23516 | . . 3 ⊢ (((dist‘𝑈) ∈ (Met‘(Base‘𝑈)) ∧ (Base‘𝑈) ⊆ (Base‘𝑈)) → ((dist‘𝑈) ↾ ((Base‘𝑈) × (Base‘𝑈))) ∈ (Met‘(Base‘𝑈))) | |
26 | 23, 24, 25 | sylancl 586 | . 2 ⊢ (𝜑 → ((dist‘𝑈) ↾ ((Base‘𝑈) × (Base‘𝑈))) ∈ (Met‘(Base‘𝑈))) |
27 | eqid 2738 | . . 3 ⊢ (TopOpen‘𝑈) = (TopOpen‘𝑈) | |
28 | eqid 2738 | . . 3 ⊢ (Base‘𝑈) = (Base‘𝑈) | |
29 | eqid 2738 | . . 3 ⊢ ((dist‘𝑈) ↾ ((Base‘𝑈) × (Base‘𝑈))) = ((dist‘𝑈) ↾ ((Base‘𝑈) × (Base‘𝑈))) | |
30 | 27, 28, 29 | isms 23602 | . 2 ⊢ (𝑈 ∈ MetSp ↔ (𝑈 ∈ ∞MetSp ∧ ((dist‘𝑈) ↾ ((Base‘𝑈) × (Base‘𝑈))) ∈ (Met‘(Base‘𝑈)))) |
31 | 7, 26, 30 | sylanbrc 583 | 1 ⊢ (𝜑 → 𝑈 ∈ MetSp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2106 ⊆ wss 3887 × cxp 5587 ↾ cres 5591 –onto→wfo 6431 –1-1-onto→wf1o 6432 ‘cfv 6433 (class class class)co 7275 Basecbs 16912 distcds 16971 TopOpenctopn 17132 “s cimas 17215 Metcmet 20583 ∞MetSpcxms 23470 MetSpcms 23471 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-of 7533 df-om 7713 df-1st 7831 df-2nd 7832 df-supp 7978 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fsupp 9129 df-sup 9201 df-inf 9202 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-4 12038 df-5 12039 df-6 12040 df-7 12041 df-8 12042 df-9 12043 df-n0 12234 df-z 12320 df-dec 12438 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-fz 13240 df-fzo 13383 df-seq 13722 df-hash 14045 df-struct 16848 df-sets 16865 df-slot 16883 df-ndx 16895 df-base 16913 df-ress 16942 df-plusg 16975 df-mulr 16976 df-sca 16978 df-vsca 16979 df-ip 16980 df-tset 16981 df-ple 16982 df-ds 16984 df-rest 17133 df-topn 17134 df-0g 17152 df-gsum 17153 df-topgen 17154 df-xrs 17213 df-qtop 17218 df-imas 17219 df-mre 17295 df-mrc 17296 df-acs 17298 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-submnd 18431 df-mulg 18701 df-cntz 18923 df-cmn 19388 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-top 22043 df-topon 22060 df-topsp 22082 df-bases 22096 df-xms 23473 df-ms 23474 |
This theorem is referenced by: xpsms 23691 |
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