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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 29498 | . . 3 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) |
4 | 3 | biantrur 533 | . 2 ⊢ ((normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
5 | 1, 2 | pjoc1i 29208 | . . . 4 ⊢ (𝐴 ∈ 𝐻 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
6 | 1, 2 | pjpythi 29499 | . . . . . 6 ⊢ ((normℎ‘𝐴)↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2)) |
7 | sq0 13556 | . . . . . . . 8 ⊢ (0↑2) = 0 | |
8 | 7 | oveq2i 7167 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) |
9 | 1, 2 | pjhclii 29199 | . . . . . . . . . . 11 ⊢ ((projℎ‘𝐻)‘𝐴) ∈ ℋ |
10 | 9 | normcli 28908 | . . . . . . . . . 10 ⊢ (normℎ‘((projℎ‘𝐻)‘𝐴)) ∈ ℝ |
11 | 10 | resqcli 13550 | . . . . . . . . 9 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℝ |
12 | 11 | recni 10655 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ∈ ℂ |
13 | 12 | addid1i 10827 | . . . . . . 7 ⊢ (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + 0) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) |
14 | 8, 13 | eqtr2i 2845 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) = (((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) + (0↑2)) |
15 | 6, 14 | eqeq12i 2836 | . . . . 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 29084 | . . . . . . . . . . 11 ⊢ (⊥‘𝐻) ∈ Cℋ |
17 | 16, 2 | pjhclii 29199 | . . . . . . . . . 10 ⊢ ((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ |
18 | 17 | normcli 28908 | . . . . . . . . 9 ⊢ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) ∈ ℝ |
19 | 18 | resqcli 13550 | . . . . . . . 8 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℝ |
20 | 19 | recni 10655 | . . . . . . 7 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) ∈ ℂ |
21 | 0cn 10633 | . . . . . . . 8 ⊢ 0 ∈ ℂ | |
22 | 21 | sqcli 13545 | . . . . . . 7 ⊢ (0↑2) ∈ ℂ |
23 | 12, 20, 22 | addcani 10833 | . . . . . 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 28903 | . . . . . . . 8 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) ∈ ℋ → 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))) | |
25 | 17, 24 | ax-mp 5 | . . . . . . 7 ⊢ 0 ≤ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) |
26 | 0le0 11739 | . . . . . . 7 ⊢ 0 ≤ 0 | |
27 | 0re 10643 | . . . . . . . 8 ⊢ 0 ∈ ℝ | |
28 | 18, 27 | sq11i 13555 | . . . . . . 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 690 | . . . . . 6 ⊢ (((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴))↑2) = (0↑2) ↔ (normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0) |
30 | 17 | norm-i-i 28910 | . . . . . 6 ⊢ ((normℎ‘((projℎ‘(⊥‘𝐻))‘𝐴)) = 0 ↔ ((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ) |
31 | 23, 29, 30 | 3bitri 299 | . . . . 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 278 | . . . 4 ⊢ (((projℎ‘(⊥‘𝐻))‘𝐴) = 0ℎ ↔ ((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2)) |
33 | normge0 28903 | . . . . . 6 ⊢ (𝐴 ∈ ℋ → 0 ≤ (normℎ‘𝐴)) | |
34 | 2, 33 | ax-mp 5 | . . . . 5 ⊢ 0 ≤ (normℎ‘𝐴) |
35 | normge0 28903 | . . . . . 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 28908 | . . . . . 6 ⊢ (normℎ‘𝐴) ∈ ℝ |
38 | 37, 10 | sq11i 13555 | . . . . 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 690 | . . . 4 ⊢ (((normℎ‘𝐴)↑2) = ((normℎ‘((projℎ‘𝐻)‘𝐴))↑2) ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴))) |
40 | 5, 32, 39 | 3bitri 299 | . . 3 ⊢ (𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) = (normℎ‘((projℎ‘𝐻)‘𝐴))) |
41 | 40 | necon3bbii 3063 | . 2 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴))) |
42 | 10, 37 | ltleni 10758 | . 2 ⊢ ((normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴) ↔ ((normℎ‘((projℎ‘𝐻)‘𝐴)) ≤ (normℎ‘𝐴) ∧ (normℎ‘𝐴) ≠ (normℎ‘((projℎ‘𝐻)‘𝐴)))) |
43 | 4, 41, 42 | 3bitr4i 305 | 1 ⊢ (¬ 𝐴 ∈ 𝐻 ↔ (normℎ‘((projℎ‘𝐻)‘𝐴)) < (normℎ‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ≠ wne 3016 class class class wbr 5066 ‘cfv 6355 (class class class)co 7156 0cc0 10537 + caddc 10540 < clt 10675 ≤ cle 10676 2c2 11693 ↑cexp 13430 ℋchba 28696 normℎcno 28700 0ℎc0v 28701 Cℋ cch 28706 ⊥cort 28707 projℎcpjh 28714 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-rep 5190 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-inf2 9104 ax-cc 9857 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 ax-pre-sup 10615 ax-addf 10616 ax-mulf 10617 ax-hilex 28776 ax-hfvadd 28777 ax-hvcom 28778 ax-hvass 28779 ax-hv0cl 28780 ax-hvaddid 28781 ax-hfvmul 28782 ax-hvmulid 28783 ax-hvmulass 28784 ax-hvdistr1 28785 ax-hvdistr2 28786 ax-hvmul0 28787 ax-hfi 28856 ax-his1 28859 ax-his2 28860 ax-his3 28861 ax-his4 28862 ax-hcompl 28979 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-iin 4922 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-se 5515 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-isom 6364 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-of 7409 df-om 7581 df-1st 7689 df-2nd 7690 df-supp 7831 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-2o 8103 df-oadd 8106 df-omul 8107 df-er 8289 df-map 8408 df-pm 8409 df-ixp 8462 df-en 8510 df-dom 8511 df-sdom 8512 df-fin 8513 df-fsupp 8834 df-fi 8875 df-sup 8906 df-inf 8907 df-oi 8974 df-card 9368 df-acn 9371 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-div 11298 df-nn 11639 df-2 11701 df-3 11702 df-4 11703 df-5 11704 df-6 11705 df-7 11706 df-8 11707 df-9 11708 df-n0 11899 df-z 11983 df-dec 12100 df-uz 12245 df-q 12350 df-rp 12391 df-xneg 12508 df-xadd 12509 df-xmul 12510 df-ioo 12743 df-ico 12745 df-icc 12746 df-fz 12894 df-fzo 13035 df-fl 13163 df-seq 13371 df-exp 13431 df-hash 13692 df-cj 14458 df-re 14459 df-im 14460 df-sqrt 14594 df-abs 14595 df-clim 14845 df-rlim 14846 df-sum 15043 df-struct 16485 df-ndx 16486 df-slot 16487 df-base 16489 df-sets 16490 df-ress 16491 df-plusg 16578 df-mulr 16579 df-starv 16580 df-sca 16581 df-vsca 16582 df-ip 16583 df-tset 16584 df-ple 16585 df-ds 16587 df-unif 16588 df-hom 16589 df-cco 16590 df-rest 16696 df-topn 16697 df-0g 16715 df-gsum 16716 df-topgen 16717 df-pt 16718 df-prds 16721 df-xrs 16775 df-qtop 16780 df-imas 16781 df-xps 16783 df-mre 16857 df-mrc 16858 df-acs 16860 df-mgm 17852 df-sgrp 17901 df-mnd 17912 df-submnd 17957 df-mulg 18225 df-cntz 18447 df-cmn 18908 df-psmet 20537 df-xmet 20538 df-met 20539 df-bl 20540 df-mopn 20541 df-fbas 20542 df-fg 20543 df-cnfld 20546 df-top 21502 df-topon 21519 df-topsp 21541 df-bases 21554 df-cld 21627 df-ntr 21628 df-cls 21629 df-nei 21706 df-cn 21835 df-cnp 21836 df-lm 21837 df-haus 21923 df-tx 22170 df-hmeo 22363 df-fil 22454 df-fm 22546 df-flim 22547 df-flf 22548 df-xms 22930 df-ms 22931 df-tms 22932 df-cfil 23858 df-cau 23859 df-cmet 23860 df-grpo 28270 df-gid 28271 df-ginv 28272 df-gdiv 28273 df-ablo 28322 df-vc 28336 df-nv 28369 df-va 28372 df-ba 28373 df-sm 28374 df-0v 28375 df-vs 28376 df-nmcv 28377 df-ims 28378 df-dip 28478 df-ssp 28499 df-ph 28590 df-cbn 28640 df-hnorm 28745 df-hba 28746 df-hvsub 28748 df-hlim 28749 df-hcau 28750 df-sh 28984 df-ch 28998 df-oc 29029 df-ch0 29030 df-shs 29085 df-pjh 29172 |
This theorem is referenced by: pjnel 29503 |
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