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| Mirrors > Home > HSE Home > Th. List > normcan | Structured version Visualization version GIF version | ||
| Description: Cancellation-type law that "extracts" a vector 𝐴 from its inner product with a proportional vector 𝐵. (Contributed by NM, 18-Mar-2006.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| normcan | ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ ∧ 𝐴 ∈ (span‘{𝐵})) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elspansn 32174 | . . . 4 ⊢ (𝐵 ∈ ℋ → (𝐴 ∈ (span‘{𝐵}) ↔ ∃𝑥 ∈ ℂ 𝐴 = (𝑥 ·ℎ 𝐵))) | |
| 2 | 1 | adantr 486 | . . 3 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (𝐴 ∈ (span‘{𝐵}) ↔ ∃𝑥 ∈ ℂ 𝐴 = (𝑥 ·ℎ 𝐵))) |
| 3 | oveq1 7428 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑥 ·ℎ 𝐵) → (𝐴 ·ih 𝐵) = ((𝑥 ·ℎ 𝐵) ·ih 𝐵)) | |
| 4 | simpr 490 | . . . . . . . . . . 11 ⊢ ((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ) | |
| 5 | simpl 488 | . . . . . . . . . . 11 ⊢ ((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) → 𝐵 ∈ ℋ) | |
| 6 | ax-his3 31692 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℂ ∧ 𝐵 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝑥 ·ℎ 𝐵) ·ih 𝐵) = (𝑥 · (𝐵 ·ih 𝐵))) | |
| 7 | 4, 5, 5, 6 | syl3anc 1398 | . . . . . . . . . 10 ⊢ ((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) → ((𝑥 ·ℎ 𝐵) ·ih 𝐵) = (𝑥 · (𝐵 ·ih 𝐵))) |
| 8 | 3, 7 | sylan9eqr 2817 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → (𝐴 ·ih 𝐵) = (𝑥 · (𝐵 ·ih 𝐵))) |
| 9 | normsq 31742 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℋ → ((normℎ‘𝐵)↑2) = (𝐵 ·ih 𝐵)) | |
| 10 | 9 | ad2antrr 739 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((normℎ‘𝐵)↑2) = (𝐵 ·ih 𝐵)) |
| 11 | 8, 10 | oveq12d 7439 | . . . . . . . 8 ⊢ (((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) = ((𝑥 · (𝐵 ·ih 𝐵)) / (𝐵 ·ih 𝐵))) |
| 12 | 11 | adantllr 732 | . . . . . . 7 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) = ((𝑥 · (𝐵 ·ih 𝐵)) / (𝐵 ·ih 𝐵))) |
| 13 | simpr 490 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ) | |
| 14 | hicl 31688 | . . . . . . . . . . 11 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (𝐵 ·ih 𝐵) ∈ ℂ) | |
| 15 | 14 | anidms 577 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℋ → (𝐵 ·ih 𝐵) ∈ ℂ) |
| 16 | 15 | ad2antrr 739 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → (𝐵 ·ih 𝐵) ∈ ℂ) |
| 17 | his6 31707 | . . . . . . . . . . . 12 ⊢ (𝐵 ∈ ℋ → ((𝐵 ·ih 𝐵) = 0 ↔ 𝐵 = 0ℎ)) | |
| 18 | 17 | necon3bid 2999 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ ℋ → ((𝐵 ·ih 𝐵) ≠ 0 ↔ 𝐵 ≠ 0ℎ)) |
| 19 | 18 | biimpar 483 | . . . . . . . . . 10 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (𝐵 ·ih 𝐵) ≠ 0) |
| 20 | 19 | adantr 486 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → (𝐵 ·ih 𝐵) ≠ 0) |
| 21 | 13, 16, 20 | divcan4d 12103 | . . . . . . . 8 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → ((𝑥 · (𝐵 ·ih 𝐵)) / (𝐵 ·ih 𝐵)) = 𝑥) |
| 22 | 21 | adantr 486 | . . . . . . 7 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((𝑥 · (𝐵 ·ih 𝐵)) / (𝐵 ·ih 𝐵)) = 𝑥) |
| 23 | 12, 22 | eqtrd 2795 | . . . . . 6 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) = 𝑥) |
| 24 | 23 | oveq1d 7436 | . . . . 5 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = (𝑥 ·ℎ 𝐵)) |
| 25 | simpr 490 | . . . . 5 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → 𝐴 = (𝑥 ·ℎ 𝐵)) | |
| 26 | 24, 25 | eqtr4d 2798 | . . . 4 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴) |
| 27 | 26 | rexlimdva2 3165 | . . 3 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (∃𝑥 ∈ ℂ 𝐴 = (𝑥 ·ℎ 𝐵) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴)) |
| 28 | 2, 27 | sylbid 243 | . 2 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (𝐴 ∈ (span‘{𝐵}) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴)) |
| 29 | 28 | 3impia 1135 | 1 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ ∧ 𝐴 ∈ (span‘{𝐵})) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 ∃wrex 3086 {csn 4584 ‘cfv 6539 (class class class)co 7421 ℂcc 11202 0cc0 11204 · cmul 11209 / cdiv 11977 2c2 12401 ↑cexp 14208 ℋchba 31527 ·ℎ csm 31529 ·ih csp 31530 normℎcno 31531 0ℎc0v 31532 spancspn 31540 |
| 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 5326 ax-pr 5390 ax-un 7752 ax-inf2 9646 ax-cc 10517 ax-cnex 11260 ax-resscn 11261 ax-1cn 11262 ax-icn 11263 ax-addcl 11264 ax-addrcl 11265 ax-mulcl 11266 ax-mulrcl 11267 ax-mulcom 11268 ax-addass 11269 ax-mulass 11270 ax-distr 11271 ax-i2m1 11272 ax-1ne0 11273 ax-1rid 11274 ax-rnegex 11275 ax-rrecex 11276 ax-cnre 11277 ax-pre-lttri 11278 ax-pre-lttrn 11279 ax-pre-ltadd 11280 ax-pre-mulgt0 11281 ax-pre-sup 11282 ax-addf 11283 ax-mulf 11284 ax-hilex 31607 ax-hfvadd 31608 ax-hvcom 31609 ax-hvass 31610 ax-hv0cl 31611 ax-hvaddid 31612 ax-hfvmul 31613 ax-hvmulid 31614 ax-hvmulass 31615 ax-hvdistr1 31616 ax-hvdistr2 31617 ax-hvmul0 31618 ax-hfi 31687 ax-his1 31690 ax-his2 31691 ax-his3 31692 ax-his4 31693 ax-hcompl 31810 |
| 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 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 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 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-se 5604 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-of 7694 df-om 7879 df-1st 8002 df-2nd 8003 df-supp 8181 df-frecs 8303 df-wrecs 8334 df-recs 8383 df-rdg 8422 df-1o 8480 df-2o 8481 df-oadd 8484 df-omul 8485 df-er 8721 df-map 8853 df-pm 8854 df-ixp 8930 df-en 8978 df-dom 8979 df-sdom 8980 df-fin 8981 df-fsupp 9358 df-fi 9407 df-sup 9438 df-inf 9439 df-oi 9508 df-card 10024 df-acn 10027 df-pnf 11349 df-mnf 11350 df-xr 11351 df-ltxr 11352 df-le 11353 df-sub 11547 df-neg 11548 df-div 11978 df-nn 12340 df-2 12409 df-3 12410 df-4 12411 df-5 12412 df-6 12413 df-7 12414 df-8 12415 df-9 12416 df-n0 12611 df-z 12698 df-dec 12819 df-uz 12970 df-q 13080 df-rp 13125 df-xneg 13245 df-xadd 13246 df-xmul 13247 df-ioo 13484 df-ico 13486 df-icc 13487 df-fz 13644 df-fzo 13793 df-fl 13936 df-seq 14149 df-exp 14209 df-hash 14479 df-cj 15272 df-re 15273 df-im 15274 df-sqrt 15408 df-abs 15409 df-clim 15661 df-rlim 15662 df-sum 15860 df-struct 17331 df-sets 17348 df-slot 17366 df-ndx 17378 df-base 17394 df-ress 17415 df-plusg 17447 df-mulr 17448 df-starv 17449 df-sca 17450 df-vsca 17451 df-ip 17452 df-tset 17453 df-ple 17454 df-ds 17456 df-unif 17457 df-hom 17458 df-cco 17459 df-rest 17599 df-topn 17600 df-0g 17618 df-gsum 17619 df-topgen 17620 df-pt 17621 df-prds 17624 df-xrs 17680 df-qtop 17685 df-imas 17686 df-xps 17688 df-mre 17762 df-mrc 17763 df-acs 17765 df-mgm 18822 df-sgrp 18914 df-mnd 18930 df-submnd 18985 df-mulg 19284 df-cntz 19537 df-cmn 20002 df-psmet 21676 df-xmet 21677 df-met 21678 df-bl 21679 df-mopn 21680 df-fbas 21681 df-fg 21682 df-cnfld 21685 df-top 23218 df-topon 23235 df-topsp 23257 df-bases 23270 df-cld 23343 df-ntr 23344 df-cls 23345 df-nei 23422 df-cn 23551 df-cnp 23552 df-lm 23553 df-haus 23639 df-tx 23887 df-hmeo 24080 df-fil 24171 df-fm 24263 df-flim 24264 df-flf 24265 df-xms 24645 df-ms 24646 df-tms 24647 df-cfil 25582 df-cau 25583 df-cmet 25584 df-grpo 31101 df-gid 31102 df-ginv 31103 df-gdiv 31104 df-ablo 31153 df-vc 31167 df-nv 31200 df-va 31203 df-ba 31204 df-sm 31205 df-0v 31206 df-vs 31207 df-nmcv 31208 df-ims 31209 df-dip 31309 df-ssp 31330 df-ph 31421 df-cbn 31471 df-hnorm 31576 df-hba 31577 df-hvsub 31579 df-hlim 31580 df-hcau 31581 df-sh 31815 df-ch 31829 df-oc 31860 df-ch0 31861 df-span 31917 |
| This theorem is used by: pjspansn 32185 eigvec1 32570 |
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