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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 32332 | . . 3 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) |
| 4 | 3 | biantrur 540 | . 2 ⊢ ((normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
| 5 | 1, 2 | pjoc1i 32042 | . . . 4 ⊢ (𝐴 ∈ 𝐻 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
| 6 | 1, 2 | pjpythi 32333 | . . . . . 6 ⊢ ((normℎ‘𝐴)↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) |
| 7 | sq0 14342 | . . . . . . . 8 ⊢ (0↑2) = 0 | |
| 8 | 7 | oveq2i 7435 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) |
| 9 | 1, 2 | pjhclii 32033 | . . . . . . . . . . 11 ⊢ ((projℎ‘𝐻)‘𝐴) ∈ ℋ |
| 10 | 9 | normcli 31742 | . . . . . . . . . 10 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ∈ ℝ |
| 11 | 10 | resqcli 14336 | . . . . . . . . 9 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℝ |
| 12 | 11 | recni 11330 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℂ |
| 13 | 12 | addridi 11504 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) |
| 14 | 8, 13 | eqtr2i 2784 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) |
| 15 | 6, 14 | eqeq12i 2778 | . . . . 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 31918 | . . . . . . . . . . 11 ⊢ (⊥‘𝐻) ∈ Cℋ |
| 17 | 16, 2 | pjhclii 32033 | . . . . . . . . . 10 ⊢ ((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ |
| 18 | 17 | normcli 31742 | . . . . . . . . 9 ⊢ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) ∈ ℝ |
| 19 | 18 | resqcli 14336 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℝ |
| 20 | 19 | recni 11330 | . . . . . . 7 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℂ |
| 21 | 0cn 11305 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
| 22 | 21 | sqcli 14331 | . . . . . . 7 ⊢ (0↑2) ∈ ℂ |
| 23 | 12, 20, 22 | addcani 11510 | . . . . . 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 31737 | . . . . . . . 8 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ → 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))) | |
| 25 | 17, 24 | ax-mp 5 | . . . . . . 7 ⊢ 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) |
| 26 | 0le0 12451 | . . . . . . 7 ⊢ 0 ≤ 0 | |
| 27 | 0re 11317 | . . . . . . . 8 ⊢ 0 ∈ ℝ | |
| 28 | 18, 27 | sq11i 14341 | . . . . . . 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 705 | . . . . . 6 ⊢ (((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) = (0↑2) ↔ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0) |
| 30 | 17 | norm-i-i 31744 | . . . . . 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 31737 | . . . . . 6 ⊢ (𝐴 ∈ ℋ → 0 ≤ (normℎ‘𝐴)) | |
| 34 | 2, 33 | ax-mp 5 | . . . . 5 ⊢ 0 ≤ (normℎ‘𝐴) |
| 35 | normge0 31737 | . . . . . 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 31742 | . . . . . 6 ⊢ (normℎ‘𝐴) ∈ ℝ |
| 38 | 37, 10 | sq11i 14341 | . . . . 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 705 | . . . 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 3002 | . 2 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴))) |
| 42 | 10, 37 | ltleni 11435 | . 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 |
| This proof depends on syntax axioms: ¬ wn 3 ↔ wb 209 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 class class class wbr 5102 ‘cfv 6543 (class class class)co 7424 0cc0 11207 + caddc 11210 < clt 11350 ≤ cle 11351 2c2 12404 ↑cexp 14211 ℋchba 31530 normℎcno 31534 0ℎc0v 31535 Cℋ cch 31540 ⊥cort 31541 projℎcpjh 31548 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-inf2 9649 ax-cc 10520 ax-cnex 11263 ax-resscn 11264 ax-1cn 11265 ax-icn 11266 ax-addcl 11267 ax-addrcl 11268 ax-mulcl 11269 ax-mulrcl 11270 ax-mulcom 11271 ax-addass 11272 ax-mulass 11273 ax-distr 11274 ax-i2m1 11275 ax-1ne0 11276 ax-1rid 11277 ax-rnegex 11278 ax-rrecex 11279 ax-cnre 11280 ax-pre-lttri 11281 ax-pre-lttrn 11282 ax-pre-ltadd 11283 ax-pre-mulgt0 11284 ax-pre-sup 11285 ax-addf 11286 ax-mulf 11287 ax-hilex 31610 ax-hfvadd 31611 ax-hvcom 31612 ax-hvass 31613 ax-hv0cl 31614 ax-hvaddid 31615 ax-hfvmul 31616 ax-hvmulid 31617 ax-hvmulass 31618 ax-hvdistr1 31619 ax-hvdistr2 31620 ax-hvmul0 31621 ax-hfi 31690 ax-his1 31693 ax-his2 31694 ax-his3 31695 ax-his4 31696 ax-hcompl 31813 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-iin 4953 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-of 7697 df-om 7882 df-1st 8005 df-2nd 8006 df-supp 8185 df-frecs 8307 df-wrecs 8338 df-recs 8387 df-rdg 8426 df-1o 8484 df-2o 8485 df-oadd 8488 df-omul 8489 df-er 8725 df-map 8857 df-pm 8858 df-ixp 8934 df-en 8982 df-dom 8983 df-sdom 8984 df-fin 8985 df-fsupp 9362 df-fi 9410 df-sup 9441 df-inf 9442 df-oi 9511 df-card 10027 df-acn 10030 df-pnf 11352 df-mnf 11353 df-xr 11354 df-ltxr 11355 df-le 11356 df-sub 11550 df-neg 11551 df-div 11981 df-nn 12343 df-2 12412 df-3 12413 df-4 12414 df-5 12415 df-6 12416 df-7 12417 df-8 12418 df-9 12419 df-n0 12614 df-z 12701 df-dec 12822 df-uz 12973 df-q 13083 df-rp 13128 df-xneg 13248 df-xadd 13249 df-xmul 13250 df-ioo 13487 df-ico 13489 df-icc 13490 df-fz 13647 df-fzo 13796 df-fl 13939 df-seq 14152 df-exp 14212 df-hash 14482 df-cj 15275 df-re 15276 df-im 15277 df-sqrt 15411 df-abs 15412 df-clim 15664 df-rlim 15665 df-sum 15863 df-struct 17334 df-sets 17351 df-slot 17369 df-ndx 17381 df-base 17397 df-ress 17418 df-plusg 17450 df-mulr 17451 df-starv 17452 df-sca 17453 df-vsca 17454 df-ip 17455 df-tset 17456 df-ple 17457 df-ds 17459 df-unif 17460 df-hom 17461 df-cco 17462 df-rest 17602 df-topn 17603 df-0g 17621 df-gsum 17622 df-topgen 17623 df-pt 17624 df-prds 17627 df-xrs 17683 df-qtop 17688 df-imas 17689 df-xps 17691 df-mre 17765 df-mrc 17766 df-acs 17768 df-mgm 18825 df-sgrp 18917 df-mnd 18933 df-submnd 18988 df-mulg 19287 df-cntz 19540 df-cmn 20005 df-psmet 21679 df-xmet 21680 df-met 21681 df-bl 21682 df-mopn 21683 df-fbas 21684 df-fg 21685 df-cnfld 21688 df-top 23221 df-topon 23238 df-topsp 23260 df-bases 23273 df-cld 23346 df-ntr 23347 df-cls 23348 df-nei 23425 df-cn 23554 df-cnp 23555 df-lm 23556 df-haus 23642 df-tx 23890 df-hmeo 24083 df-fil 24174 df-fm 24266 df-flim 24267 df-flf 24268 df-xms 24648 df-ms 24649 df-tms 24650 df-cfil 25585 df-cau 25586 df-cmet 25587 df-grpo 31104 df-gid 31105 df-ginv 31106 df-gdiv 31107 df-ablo 31156 df-vc 31170 df-nv 31203 df-va 31206 df-ba 31207 df-sm 31208 df-0v 31209 df-vs 31210 df-nmcv 31211 df-ims 31212 df-dip 31312 df-ssp 31333 df-ph 31424 df-cbn 31474 df-hnorm 31579 df-hba 31580 df-hvsub 31582 df-hlim 31583 df-hcau 31584 df-sh 31818 df-ch 31832 df-oc 31863 df-ch0 31864 df-shs 31919 df-pjh 32006 |
| This theorem is used by: pjnel 32337 |
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