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Mirrors > Home > MPE Home > Th. List > bnsscmcl | Structured version Visualization version GIF version |
Description: A subspace of a Banach space is a Banach space iff it is closed in the norm-induced metric of the parent space. (Contributed by NM, 1-Feb-2008.) (New usage is discouraged.) |
Ref | Expression |
---|---|
bnsscmcl.x | ⊢ 𝑋 = (BaseSet‘𝑈) |
bnsscmcl.d | ⊢ 𝐷 = (IndMet‘𝑈) |
bnsscmcl.j | ⊢ 𝐽 = (MetOpen‘𝐷) |
bnsscmcl.h | ⊢ 𝐻 = (SubSp‘𝑈) |
bnsscmcl.y | ⊢ 𝑌 = (BaseSet‘𝑊) |
Ref | Expression |
---|---|
bnsscmcl | ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → (𝑊 ∈ CBan ↔ 𝑌 ∈ (Clsd‘𝐽))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bnnv 29228 | . . . 4 ⊢ (𝑈 ∈ CBan → 𝑈 ∈ NrmCVec) | |
2 | bnsscmcl.h | . . . . 5 ⊢ 𝐻 = (SubSp‘𝑈) | |
3 | 2 | sspnv 29088 | . . . 4 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝑊 ∈ 𝐻) → 𝑊 ∈ NrmCVec) |
4 | 1, 3 | sylan 580 | . . 3 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → 𝑊 ∈ NrmCVec) |
5 | bnsscmcl.y | . . . . 5 ⊢ 𝑌 = (BaseSet‘𝑊) | |
6 | eqid 2738 | . . . . 5 ⊢ (IndMet‘𝑊) = (IndMet‘𝑊) | |
7 | 5, 6 | iscbn 29226 | . . . 4 ⊢ (𝑊 ∈ CBan ↔ (𝑊 ∈ NrmCVec ∧ (IndMet‘𝑊) ∈ (CMet‘𝑌))) |
8 | 7 | baib 536 | . . 3 ⊢ (𝑊 ∈ NrmCVec → (𝑊 ∈ CBan ↔ (IndMet‘𝑊) ∈ (CMet‘𝑌))) |
9 | 4, 8 | syl 17 | . 2 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → (𝑊 ∈ CBan ↔ (IndMet‘𝑊) ∈ (CMet‘𝑌))) |
10 | bnsscmcl.d | . . . . 5 ⊢ 𝐷 = (IndMet‘𝑈) | |
11 | 5, 10, 6, 2 | sspims 29101 | . . . 4 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝑊 ∈ 𝐻) → (IndMet‘𝑊) = (𝐷 ↾ (𝑌 × 𝑌))) |
12 | 1, 11 | sylan 580 | . . 3 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → (IndMet‘𝑊) = (𝐷 ↾ (𝑌 × 𝑌))) |
13 | 12 | eleq1d 2823 | . 2 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → ((IndMet‘𝑊) ∈ (CMet‘𝑌) ↔ (𝐷 ↾ (𝑌 × 𝑌)) ∈ (CMet‘𝑌))) |
14 | bnsscmcl.x | . . . . 5 ⊢ 𝑋 = (BaseSet‘𝑈) | |
15 | 14, 10 | cbncms 29227 | . . . 4 ⊢ (𝑈 ∈ CBan → 𝐷 ∈ (CMet‘𝑋)) |
16 | 15 | adantr 481 | . . 3 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → 𝐷 ∈ (CMet‘𝑋)) |
17 | bnsscmcl.j | . . . 4 ⊢ 𝐽 = (MetOpen‘𝐷) | |
18 | 17 | cmetss 24480 | . . 3 ⊢ (𝐷 ∈ (CMet‘𝑋) → ((𝐷 ↾ (𝑌 × 𝑌)) ∈ (CMet‘𝑌) ↔ 𝑌 ∈ (Clsd‘𝐽))) |
19 | 16, 18 | syl 17 | . 2 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → ((𝐷 ↾ (𝑌 × 𝑌)) ∈ (CMet‘𝑌) ↔ 𝑌 ∈ (Clsd‘𝐽))) |
20 | 9, 13, 19 | 3bitrd 305 | 1 ⊢ ((𝑈 ∈ CBan ∧ 𝑊 ∈ 𝐻) → (𝑊 ∈ CBan ↔ 𝑌 ∈ (Clsd‘𝐽))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 × cxp 5587 ↾ cres 5591 ‘cfv 6433 MetOpencmopn 20587 Clsdccld 22167 CMetccmet 24418 NrmCVeccnv 28946 BaseSetcba 28948 IndMetcims 28953 SubSpcss 29083 CBanccbn 29224 |
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-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-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-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 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-fi 9170 df-sup 9201 df-inf 9202 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-n0 12234 df-z 12320 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-ico 13085 df-icc 13086 df-rest 17133 df-topgen 17154 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-fbas 20594 df-fg 20595 df-top 22043 df-topon 22060 df-bases 22096 df-cld 22170 df-ntr 22171 df-cls 22172 df-nei 22249 df-haus 22466 df-fil 22997 df-flim 23090 df-cfil 24419 df-cmet 24421 df-grpo 28855 df-gid 28856 df-ginv 28857 df-gdiv 28858 df-ablo 28907 df-vc 28921 df-nv 28954 df-va 28957 df-ba 28958 df-sm 28959 df-0v 28960 df-vs 28961 df-nmcv 28962 df-ims 28963 df-ssp 29084 df-cbn 29225 |
This theorem is referenced by: (None) |
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