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| Mirrors > Home > HSE Home > Th. List > pjhtheu | Structured version Visualization version GIF version | ||
| Description: Projection Theorem: Any Hilbert space vector 𝐴 can be decomposed uniquely into a member 𝑥 of a closed subspace 𝐻 and a member 𝑦 of the complement of the subspace. Theorem 3.7(i) of [Beran] p. 102. See pjhtheu2 32045 for the uniqueness of 𝑦. (Contributed by NM, 23-Oct-1999.) (Revised by Mario Carneiro, 14-May-2014.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| pjhtheu | ⊢ ((𝐻 ∈ Cℋ ∧ 𝐴 ∈ ℋ) → ∃!𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pjhth 32022 | . . . . 5 ⊢ (𝐻 ∈ Cℋ → (𝐻 +ℋ (⊥‘𝐻)) = ℋ) | |
| 2 | 1 | eleq2d 2850 | . . . 4 ⊢ (𝐻 ∈ Cℋ → (𝐴 ∈ (𝐻 +ℋ (⊥‘𝐻)) ↔ 𝐴 ∈ ℋ)) |
| 3 | chsh 31853 | . . . . 5 ⊢ (𝐻 ∈ Cℋ → 𝐻 ∈ Sℋ ) | |
| 4 | shocsh 31913 | . . . . 5 ⊢ (𝐻 ∈ Sℋ → (⊥‘𝐻) ∈ Sℋ ) | |
| 5 | shsel 31943 | . . . . 5 ⊢ ((𝐻 ∈ Sℋ ∧ (⊥‘𝐻) ∈ Sℋ ) → (𝐴 ∈ (𝐻 +ℋ (⊥‘𝐻)) ↔ ∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) | |
| 6 | 3, 4, 5 | syl2anc2 597 | . . . 4 ⊢ (𝐻 ∈ Cℋ → (𝐴 ∈ (𝐻 +ℋ (⊥‘𝐻)) ↔ ∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) |
| 7 | 2, 6 | bitr3d 284 | . . 3 ⊢ (𝐻 ∈ Cℋ → (𝐴 ∈ ℋ ↔ ∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) |
| 8 | 7 | biimpa 482 | . 2 ⊢ ((𝐻 ∈ Cℋ ∧ 𝐴 ∈ ℋ) → ∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦)) |
| 9 | 3, 4 | syl 18 | . . . 4 ⊢ (𝐻 ∈ Cℋ → (⊥‘𝐻) ∈ Sℋ ) |
| 10 | ocin 31925 | . . . . 5 ⊢ (𝐻 ∈ Sℋ → (𝐻 ∩ (⊥‘𝐻)) = 0ℋ) | |
| 11 | 3, 10 | syl 18 | . . . 4 ⊢ (𝐻 ∈ Cℋ → (𝐻 ∩ (⊥‘𝐻)) = 0ℋ) |
| 12 | pjhthmo 31931 | . . . 4 ⊢ ((𝐻 ∈ Sℋ ∧ (⊥‘𝐻) ∈ Sℋ ∧ (𝐻 ∩ (⊥‘𝐻)) = 0ℋ) → ∃*𝑥(𝑥 ∈ 𝐻 ∧ ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) | |
| 13 | 3, 9, 11, 12 | syl3anc 1399 | . . 3 ⊢ (𝐻 ∈ Cℋ → ∃*𝑥(𝑥 ∈ 𝐻 ∧ ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) |
| 14 | 13 | adantr 486 | . 2 ⊢ ((𝐻 ∈ Cℋ ∧ 𝐴 ∈ ℋ) → ∃*𝑥(𝑥 ∈ 𝐻 ∧ ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) |
| 15 | reu5 3371 | . . 3 ⊢ (∃!𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ↔ (∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ∧ ∃*𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) | |
| 16 | df-rmo 3369 | . . . 4 ⊢ (∃*𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ↔ ∃*𝑥(𝑥 ∈ 𝐻 ∧ ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦))) | |
| 17 | 16 | anbi2i 635 | . . 3 ⊢ ((∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ∧ ∃*𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦)) ↔ (∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ∧ ∃*𝑥(𝑥 ∈ 𝐻 ∧ ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦)))) |
| 18 | 15, 17 | bitri 278 | . 2 ⊢ (∃!𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ↔ (∃𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦) ∧ ∃*𝑥(𝑥 ∈ 𝐻 ∧ ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦)))) |
| 19 | 8, 14, 18 | sylanbrc 595 | 1 ⊢ ((𝐻 ∈ Cℋ ∧ 𝐴 ∈ ℋ) → ∃!𝑥 ∈ 𝐻 ∃𝑦 ∈ (⊥‘𝐻)𝐴 = (𝑥 +ℎ 𝑦)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ∃*wmo 2565 ∃wrex 3090 ∃!wreu 3367 ∃*wrmo 3368 ∩ cin 4092 ‘cfv 6555 (class class class)co 7440 ℋchba 31548 +ℎ cva 31549 Sℋ csh 31557 Cℋ cch 31558 ⊥cort 31559 +ℋ cph 31560 0ℋc0h 31564 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-inf2 9666 ax-cc 10537 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 ax-pre-sup 11302 ax-addf 11303 ax-mulf 11304 ax-hilex 31628 ax-hfvadd 31629 ax-hvcom 31630 ax-hvass 31631 ax-hv0cl 31632 ax-hvaddid 31633 ax-hfvmul 31634 ax-hvmulid 31635 ax-hvmulass 31636 ax-hvdistr1 31637 ax-hvdistr2 31638 ax-hvmul0 31639 ax-hfi 31708 ax-his1 31711 ax-his2 31712 ax-his3 31713 ax-his4 31714 ax-hcompl 31831 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-iin 4957 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-isom 6564 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-1st 8022 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-1o 8501 df-2o 8502 df-oadd 8505 df-omul 8506 df-er 8742 df-map 8874 df-pm 8875 df-en 8999 df-dom 9000 df-sdom 9001 df-fin 9002 df-fi 9427 df-sup 9458 df-inf 9459 df-oi 9528 df-card 10044 df-acn 10047 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-div 11998 df-nn 12360 df-2 12429 df-3 12430 df-4 12431 df-n0 12631 df-z 12718 df-uz 12990 df-q 13100 df-rp 13145 df-xneg 13265 df-xadd 13266 df-xmul 13267 df-ico 13506 df-icc 13507 df-fz 13664 df-fl 13956 df-seq 14169 df-exp 14229 df-cj 15292 df-re 15293 df-im 15294 df-sqrt 15428 df-abs 15429 df-clim 15681 df-rlim 15682 df-rest 17619 df-topgen 17640 df-psmet 21697 df-xmet 21698 df-met 21699 df-bl 21700 df-mopn 21701 df-fbas 21702 df-fg 21703 df-top 23239 df-topon 23256 df-bases 23291 df-cld 23364 df-ntr 23365 df-cls 23366 df-nei 23443 df-lm 23574 df-haus 23660 df-fil 24192 df-fm 24284 df-flim 24285 df-flf 24286 df-cfil 25603 df-cau 25604 df-cmet 25605 df-grpo 31122 df-gid 31123 df-ginv 31124 df-gdiv 31125 df-ablo 31174 df-vc 31188 df-nv 31221 df-va 31224 df-ba 31225 df-sm 31226 df-0v 31227 df-vs 31228 df-nmcv 31229 df-ims 31230 df-ssp 31351 df-ph 31442 df-cbn 31492 df-hnorm 31597 df-hba 31598 df-hvsub 31600 df-hlim 31601 df-hcau 31602 df-sh 31836 df-ch 31850 df-oc 31881 df-ch0 31882 df-shs 31937 |
| This theorem is used by: pjhtheu2 32045 |
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