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| Mirrors > Home > HSE Home > Th. List > pjneli | Structured version Visualization version GIF version | ||
| Description: If a vector does not belong to subspace, the norm of its projection is less than its norm. (Contributed by NM, 27-Oct-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| pjnorm.1 | ⊢ 𝐻 ∈ Cℋ |
| pjnorm.2 | ⊢ 𝐴 ∈ ℋ |
| Ref | Expression |
|---|---|
| pjneli | ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pjnorm.1 | . . . 4 ⊢ 𝐻 ∈ Cℋ | |
| 2 | pjnorm.2 | . . . 4 ⊢ 𝐴 ∈ ℋ | |
| 3 | 1, 2 | pjnormi 32073 | . . 3 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) |
| 4 | 3 | biantrur 539 | . 2 ⊢ ((normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
| 5 | 1, 2 | pjoc1i 31783 | . . . 4 ⊢ (𝐴 ∈ 𝐻 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
| 6 | 1, 2 | pjpythi 32074 | . . . . . 6 ⊢ ((normℎ‘𝐴)↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) |
| 7 | sq0 14224 | . . . . . . . 8 ⊢ (0↑2) = 0 | |
| 8 | 7 | oveq2i 7421 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) |
| 9 | 1, 2 | pjhclii 31774 | . . . . . . . . . . 11 ⊢ ((projℎ‘𝐻)‘𝐴) ∈ ℋ |
| 10 | 9 | normcli 31483 | . . . . . . . . . 10 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ∈ ℝ |
| 11 | 10 | resqcli 14218 | . . . . . . . . 9 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℝ |
| 12 | 11 | recni 11218 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℂ |
| 13 | 12 | addridi 11392 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) |
| 14 | 8, 13 | eqtr2i 2787 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) |
| 15 | 6, 14 | eqeq12i 2781 | . . . . 5 ⊢ (((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ↔ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2))) |
| 16 | 1 | choccli 31659 | . . . . . . . . . . 11 ⊢ (⊥‘𝐻) ∈ Cℋ |
| 17 | 16, 2 | pjhclii 31774 | . . . . . . . . . 10 ⊢ ((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ |
| 18 | 17 | normcli 31483 | . . . . . . . . 9 ⊢ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) ∈ ℝ |
| 19 | 18 | resqcli 14218 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℝ |
| 20 | 19 | recni 11218 | . . . . . . 7 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℂ |
| 21 | 0cn 11193 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 22 | 21 | sqcli 14213 | . . . . . . 7 ⊢ (0↑2) ∈ ℂ |
| 23 | 12, 20, 22 | addcani 11398 | . . . . . 6 ⊢ ((((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) ↔ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) = (0↑2)) |
| 24 | normge0 31478 | . . . . . . . 8 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ → 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))) | |
| 25 | 17, 24 | ax-mp 5 | . . . . . . 7 ⊢ 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) |
| 26 | 0le0 12337 | . . . . . . 7 ⊢ 0 ≤ 0 | |
| 27 | 0re 11205 | . . . . . . . 8 ⊢ 0 ∈ ℝ | |
| 28 | 18, 27 | sq11i 14223 | . . . . . . 7 ⊢ ((0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) ∧ 0 ≤ 0) → (((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) = (0↑2) ↔ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0)) |
| 29 | 25, 26, 28 | mp2an 704 | . . . . . 6 ⊢ (((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) = (0↑2) ↔ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0) |
| 30 | 17 | norm-i-i 31485 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
| 31 | 23, 29, 30 | 3bitri 300 | . . . . 5 ⊢ ((((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
| 32 | 15, 31 | bitr2i 279 | . . . 4 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ ↔ ((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2)) |
| 33 | normge0 31478 | . . . . . 6 ⊢ (𝐴 ∈ ℋ → 0 ≤ (normℎ‘𝐴)) | |
| 34 | 2, 33 | ax-mp 5 | . . . . 5 ⊢ 0 ≤ (normℎ‘𝐴) |
| 35 | normge0 31478 | . . . . . 6 ⊢ (((projℎ‘𝐻)‘𝐴) ∈ ℋ → 0 ≤ (normℎ‘((projℎ‘𝐻)‘𝐴))) | |
| 36 | 9, 35 | ax-mp 5 | . . . . 5 ⊢ 0 ≤ (normℎ‘((projℎ‘𝐻)‘𝐴)) |
| 37 | 2 | normcli 31483 | . . . . . 6 ⊢ (normℎ‘𝐴) ∈ ℝ |
| 38 | 37, 10 | sq11i 14223 | . . . . 5 ⊢ ((0 ≤ (normℎ‘𝐴) ∧ 0 ≤ (normℎ‘((projℎ‘𝐻)‘𝐴))) → (((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
| 39 | 34, 36, 38 | mp2an 704 | . . . 4 ⊢ (((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 40 | 5, 32, 39 | 3bitri 300 | . . 3 ⊢ (𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 41 | 40 | necon3bbii 3005 | . 2 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 42 | 10, 37 | ltleni 11323 | . 2 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
| 43 | 4, 41, 42 | 3bitr4i 306 | 1 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 class class class wbr 5109 ‘cfv 6536 (class class class)co 7410 0cc0 11095 + caddc 11098 < clt 11238 ≤ cle 11239 2c2 12290 ↑cexp 14093 ℋchba 31271 normℎcno 31275 0ℎc0v 31276 Cℋ cch 31281 ⊥cort 31282 projℎcpjh 31289 |
| 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 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-inf2 9606 ax-cc 10414 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 ax-pre-sup 11173 ax-addf 11174 ax-mulf 11175 ax-hilex 31351 ax-hfvadd 31352 ax-hvcom 31353 ax-hvass 31354 ax-hv0cl 31355 ax-hvaddid 31356 ax-hfvmul 31357 ax-hvmulid 31358 ax-hvmulass 31359 ax-hvdistr1 31360 ax-hvdistr2 31361 ax-hvmul0 31362 ax-hfi 31431 ax-his1 31434 ax-his2 31435 ax-his3 31436 ax-his4 31437 ax-hcompl 31554 |
| 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 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-iin 4959 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-se 5615 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-of 7674 df-om 7859 df-1st 7982 df-2nd 7983 df-supp 8153 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-2o 8450 df-oadd 8453 df-omul 8454 df-er 8690 df-map 8822 df-pm 8823 df-ixp 8892 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fsupp 9318 df-fi 9367 df-sup 9398 df-inf 9399 df-oi 9468 df-card 9921 df-acn 9924 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-div 11867 df-nn 12229 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 df-n0 12500 df-z 12587 df-dec 12707 df-uz 12858 df-q 12968 df-rp 13012 df-xneg 13132 df-xadd 13133 df-xmul 13134 df-ioo 13371 df-ico 13373 df-icc 13374 df-fz 13531 df-fzo 13679 df-fl 13821 df-seq 14034 df-exp 14094 df-hash 14363 df-cj 15146 df-re 15147 df-im 15148 df-sqrt 15282 df-abs 15283 df-clim 15535 df-rlim 15536 df-sum 15734 df-struct 17202 df-sets 17219 df-slot 17237 df-ndx 17249 df-base 17265 df-ress 17286 df-plusg 17318 df-mulr 17319 df-starv 17320 df-sca 17321 df-vsca 17322 df-ip 17323 df-tset 17324 df-ple 17325 df-ds 17327 df-unif 17328 df-hom 17329 df-cco 17330 df-rest 17470 df-topn 17471 df-0g 17489 df-gsum 17490 df-topgen 17491 df-pt 17492 df-prds 17495 df-xrs 17551 df-qtop 17556 df-imas 17557 df-xps 17559 df-mre 17633 df-mrc 17634 df-acs 17636 df-mgm 18693 df-sgrp 18772 df-mnd 18788 df-submnd 18837 df-mulg 19129 df-cntz 19382 df-cmn 19847 df-psmet 21514 df-xmet 21515 df-met 21516 df-bl 21517 df-mopn 21518 df-fbas 21519 df-fg 21520 df-cnfld 21523 df-top 23051 df-topon 23068 df-topsp 23090 df-bases 23103 df-cld 23176 df-ntr 23177 df-cls 23178 df-nei 23255 df-cn 23384 df-cnp 23385 df-lm 23386 df-haus 23472 df-tx 23719 df-hmeo 23912 df-fil 24003 df-fm 24095 df-flim 24096 df-flf 24097 df-xms 24477 df-ms 24478 df-tms 24479 df-cfil 25414 df-cau 25415 df-cmet 25416 df-grpo 30845 df-gid 30846 df-ginv 30847 df-gdiv 30848 df-ablo 30897 df-vc 30911 df-nv 30944 df-va 30947 df-ba 30948 df-sm 30949 df-0v 30950 df-vs 30951 df-nmcv 30952 df-ims 30953 df-dip 31053 df-ssp 31074 df-ph 31165 df-cbn 31215 df-hnorm 31320 df-hba 31321 df-hvsub 31323 df-hlim 31324 df-hcau 31325 df-sh 31559 df-ch 31573 df-oc 31604 df-ch0 31605 df-shs 31660 df-pjh 31747 |
| This theorem is referenced by: pjnel 32078 |
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