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| Mirrors > Home > HSE Home > Th. List > ococ | Structured version Visualization version GIF version | ||
| Description: Complement of complement of a closed subspace of Hilbert space. Theorem 3.7(ii) of [Beran] p. 102. (Contributed by NM, 11-Oct-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| ococ | ⊢ (𝐴 ∈ Cℋ → (⊥‘(⊥‘𝐴)) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2fveq3 6888 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ Cℋ , 𝐴, ℋ) → (⊥‘(⊥‘𝐴)) = (⊥‘(⊥‘if(𝐴 ∈ Cℋ , 𝐴, ℋ)))) | |
| 2 | id 23 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ Cℋ , 𝐴, ℋ) → 𝐴 = if(𝐴 ∈ Cℋ , 𝐴, ℋ)) | |
| 3 | 1, 2 | eqeq12d 2779 | . 2 ⊢ (𝐴 = if(𝐴 ∈ Cℋ , 𝐴, ℋ) → ((⊥‘(⊥‘𝐴)) = 𝐴 ↔ (⊥‘(⊥‘if(𝐴 ∈ Cℋ , 𝐴, ℋ))) = if(𝐴 ∈ Cℋ , 𝐴, ℋ))) |
| 4 | ifchhv 31574 | . . 3 ⊢ if(𝐴 ∈ Cℋ , 𝐴, ℋ) ∈ Cℋ | |
| 5 | 4 | ococi 31735 | . 2 ⊢ (⊥‘(⊥‘if(𝐴 ∈ Cℋ , 𝐴, ℋ))) = if(𝐴 ∈ Cℋ , 𝐴, ℋ) |
| 6 | 3, 5 | dedth 4547 | 1 ⊢ (𝐴 ∈ Cℋ → (⊥‘(⊥‘𝐴)) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 ifcif 4488 ‘cfv 6538 ℋchba 31249 Cℋ cch 31259 ⊥cort 31260 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-inf2 9611 ax-cc 10420 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 ax-pre-sup 11179 ax-addf 11180 ax-mulf 11181 ax-hilex 31329 ax-hfvadd 31330 ax-hvcom 31331 ax-hvass 31332 ax-hv0cl 31333 ax-hvaddid 31334 ax-hfvmul 31335 ax-hvmulid 31336 ax-hvmulass 31337 ax-hvdistr1 31338 ax-hvdistr2 31339 ax-hvmul0 31340 ax-hfi 31409 ax-his1 31412 ax-his2 31413 ax-his3 31414 ax-his4 31415 ax-hcompl 31532 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-int 4914 df-iun 4959 df-iin 4960 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-isom 6547 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-1o 8454 df-2o 8455 df-oadd 8458 df-omul 8459 df-er 8695 df-map 8827 df-pm 8828 df-en 8945 df-dom 8946 df-sdom 8947 df-fin 8948 df-fi 9372 df-sup 9403 df-inf 9404 df-oi 9473 df-card 9926 df-acn 9929 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 df-nn 12235 df-2 12304 df-3 12305 df-4 12306 df-n0 12506 df-z 12593 df-uz 12864 df-q 12974 df-rp 13018 df-xneg 13138 df-xadd 13139 df-xmul 13140 df-ico 13379 df-icc 13380 df-fz 13537 df-fl 13827 df-seq 14040 df-exp 14100 df-cj 15152 df-re 15153 df-im 15154 df-sqrt 15288 df-abs 15289 df-clim 15541 df-rlim 15542 df-rest 17476 df-topgen 17497 df-psmet 21495 df-xmet 21496 df-met 21497 df-bl 21498 df-mopn 21499 df-fbas 21500 df-fg 21501 df-top 23032 df-topon 23049 df-bases 23084 df-cld 23157 df-ntr 23158 df-cls 23159 df-nei 23236 df-lm 23367 df-haus 23453 df-fil 23984 df-fm 24076 df-flim 24077 df-flf 24078 df-cfil 25395 df-cau 25396 df-cmet 25397 df-grpo 30823 df-gid 30824 df-ginv 30825 df-gdiv 30826 df-ablo 30875 df-vc 30889 df-nv 30922 df-va 30925 df-ba 30926 df-sm 30927 df-0v 30928 df-vs 30929 df-nmcv 30930 df-ims 30931 df-ssp 31052 df-ph 31143 df-cbn 31193 df-hnorm 31298 df-hba 31299 df-hvsub 31301 df-hlim 31302 df-hcau 31303 df-sh 31537 df-ch 31551 df-oc 31582 df-ch0 31583 |
| This theorem is referenced by: dfch2 31737 ococin 31738 shlub 31744 pjhtheu2 31746 shjshseli 31823 chsscon1 31831 chpsscon1 31834 chpsscon2 31835 chdmm2 31856 chdmm3 31857 chdmm4 31858 chdmj1 31859 chdmj2 31860 chdmj3 31861 chdmj4 31862 fh2 31949 hstle 32560 hstoh 32562 mddmd 32631 |
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