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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 31810 | . . 3 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) |
| 4 | 3 | biantrur 530 | . 2 ⊢ ((normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
| 5 | 1, 2 | pjoc1i 31520 | . . . 4 ⊢ (𝐴 ∈ 𝐻 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
| 6 | 1, 2 | pjpythi 31811 | . . . . . 6 ⊢ ((normℎ‘𝐴)↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) |
| 7 | sq0 14148 | . . . . . . . 8 ⊢ (0↑2) = 0 | |
| 8 | 7 | oveq2i 7372 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) |
| 9 | 1, 2 | pjhclii 31511 | . . . . . . . . . . 11 ⊢ ((projℎ‘𝐻)‘𝐴) ∈ ℋ |
| 10 | 9 | normcli 31220 | . . . . . . . . . 10 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ∈ ℝ |
| 11 | 10 | resqcli 14142 | . . . . . . . . 9 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℝ |
| 12 | 11 | recni 11153 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℂ |
| 13 | 12 | addridi 11327 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) |
| 14 | 8, 13 | eqtr2i 2761 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) |
| 15 | 6, 14 | eqeq12i 2755 | . . . . 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 31396 | . . . . . . . . . . 11 ⊢ (⊥‘𝐻) ∈ Cℋ |
| 17 | 16, 2 | pjhclii 31511 | . . . . . . . . . 10 ⊢ ((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ |
| 18 | 17 | normcli 31220 | . . . . . . . . 9 ⊢ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) ∈ ℝ |
| 19 | 18 | resqcli 14142 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℝ |
| 20 | 19 | recni 11153 | . . . . . . 7 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℂ |
| 21 | 0cn 11130 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 22 | 21 | sqcli 14137 | . . . . . . 7 ⊢ (0↑2) ∈ ℂ |
| 23 | 12, 20, 22 | addcani 11333 | . . . . . 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 31215 | . . . . . . . 8 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ → 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))) | |
| 25 | 17, 24 | ax-mp 5 | . . . . . . 7 ⊢ 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) |
| 26 | 0le0 12276 | . . . . . . 7 ⊢ 0 ≤ 0 | |
| 27 | 0re 11140 | . . . . . . . 8 ⊢ 0 ∈ ℝ | |
| 28 | 18, 27 | sq11i 14147 | . . . . . . 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 693 | . . . . . 6 ⊢ (((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) = (0↑2) ↔ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0) |
| 30 | 17 | norm-i-i 31222 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
| 31 | 23, 29, 30 | 3bitri 297 | . . . . 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 276 | . . . 4 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ ↔ ((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2)) |
| 33 | normge0 31215 | . . . . . 6 ⊢ (𝐴 ∈ ℋ → 0 ≤ (normℎ‘𝐴)) | |
| 34 | 2, 33 | ax-mp 5 | . . . . 5 ⊢ 0 ≤ (normℎ‘𝐴) |
| 35 | normge0 31215 | . . . . . 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 31220 | . . . . . 6 ⊢ (normℎ‘𝐴) ∈ ℝ |
| 38 | 37, 10 | sq11i 14147 | . . . . 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 693 | . . . 4 ⊢ (((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 40 | 5, 32, 39 | 3bitri 297 | . . 3 ⊢ (𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 41 | 40 | necon3bbii 2980 | . 2 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 42 | 10, 37 | ltleni 11258 | . 2 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
| 43 | 4, 41, 42 | 3bitr4i 303 | 1 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 class class class wbr 5086 ‘cfv 6493 (class class class)co 7361 0cc0 11032 + caddc 11035 < clt 11173 ≤ cle 11174 2c2 12230 ↑cexp 14017 ℋchba 31008 normℎcno 31012 0ℎc0v 31013 Cℋ cch 31018 ⊥cort 31019 projℎcpjh 31026 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-inf2 9556 ax-cc 10351 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 ax-pre-sup 11110 ax-addf 11111 ax-mulf 11112 ax-hilex 31088 ax-hfvadd 31089 ax-hvcom 31090 ax-hvass 31091 ax-hv0cl 31092 ax-hvaddid 31093 ax-hfvmul 31094 ax-hvmulid 31095 ax-hvmulass 31096 ax-hvdistr1 31097 ax-hvdistr2 31098 ax-hvmul0 31099 ax-hfi 31168 ax-his1 31171 ax-his2 31172 ax-his3 31173 ax-his4 31174 ax-hcompl 31291 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-iin 4937 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-of 7625 df-om 7812 df-1st 7936 df-2nd 7937 df-supp 8105 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-oadd 8403 df-omul 8404 df-er 8637 df-map 8769 df-pm 8770 df-ixp 8840 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-fsupp 9269 df-fi 9318 df-sup 9349 df-inf 9350 df-oi 9419 df-card 9857 df-acn 9860 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-div 11802 df-nn 12169 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 df-9 12245 df-n0 12432 df-z 12519 df-dec 12639 df-uz 12783 df-q 12893 df-rp 12937 df-xneg 13057 df-xadd 13058 df-xmul 13059 df-ioo 13296 df-ico 13298 df-icc 13299 df-fz 13456 df-fzo 13603 df-fl 13745 df-seq 13958 df-exp 14018 df-hash 14287 df-cj 15055 df-re 15056 df-im 15057 df-sqrt 15191 df-abs 15192 df-clim 15444 df-rlim 15445 df-sum 15643 df-struct 17111 df-sets 17128 df-slot 17146 df-ndx 17158 df-base 17174 df-ress 17195 df-plusg 17227 df-mulr 17228 df-starv 17229 df-sca 17230 df-vsca 17231 df-ip 17232 df-tset 17233 df-ple 17234 df-ds 17236 df-unif 17237 df-hom 17238 df-cco 17239 df-rest 17379 df-topn 17380 df-0g 17398 df-gsum 17399 df-topgen 17400 df-pt 17401 df-prds 17404 df-xrs 17460 df-qtop 17465 df-imas 17466 df-xps 17468 df-mre 17542 df-mrc 17543 df-acs 17545 df-mgm 18602 df-sgrp 18681 df-mnd 18697 df-submnd 18746 df-mulg 19038 df-cntz 19286 df-cmn 19751 df-psmet 21339 df-xmet 21340 df-met 21341 df-bl 21342 df-mopn 21343 df-fbas 21344 df-fg 21345 df-cnfld 21348 df-top 22872 df-topon 22889 df-topsp 22911 df-bases 22924 df-cld 22997 df-ntr 22998 df-cls 22999 df-nei 23076 df-cn 23205 df-cnp 23206 df-lm 23207 df-haus 23293 df-tx 23540 df-hmeo 23733 df-fil 23824 df-fm 23916 df-flim 23917 df-flf 23918 df-xms 24298 df-ms 24299 df-tms 24300 df-cfil 25235 df-cau 25236 df-cmet 25237 df-grpo 30582 df-gid 30583 df-ginv 30584 df-gdiv 30585 df-ablo 30634 df-vc 30648 df-nv 30681 df-va 30684 df-ba 30685 df-sm 30686 df-0v 30687 df-vs 30688 df-nmcv 30689 df-ims 30690 df-dip 30790 df-ssp 30811 df-ph 30902 df-cbn 30952 df-hnorm 31057 df-hba 31058 df-hvsub 31060 df-hlim 31061 df-hcau 31062 df-sh 31296 df-ch 31310 df-oc 31341 df-ch0 31342 df-shs 31397 df-pjh 31484 |
| This theorem is referenced by: pjnel 31815 |
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