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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 31550 | . . . 4 ⊢ (𝐵 ∈ ℋ → (𝐴 ∈ (span‘{𝐵}) ↔ ∃𝑥 ∈ ℂ 𝐴 = (𝑥 ·ℎ 𝐵))) | |
| 2 | 1 | adantr 480 | . . 3 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (𝐴 ∈ (span‘{𝐵}) ↔ ∃𝑥 ∈ ℂ 𝐴 = (𝑥 ·ℎ 𝐵))) |
| 3 | oveq1 7361 | . . . . . . . . . 10 ⊢ (𝐴 = (𝑥 ·ℎ 𝐵) → (𝐴 ·ih 𝐵) = ((𝑥 ·ℎ 𝐵) ·ih 𝐵)) | |
| 4 | simpr 484 | . . . . . . . . . . 11 ⊢ ((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ) | |
| 5 | simpl 482 | . . . . . . . . . . 11 ⊢ ((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) → 𝐵 ∈ ℋ) | |
| 6 | ax-his3 31068 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℂ ∧ 𝐵 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝑥 ·ℎ 𝐵) ·ih 𝐵) = (𝑥 · (𝐵 ·ih 𝐵))) | |
| 7 | 4, 5, 5, 6 | syl3anc 1373 | . . . . . . . . . 10 ⊢ ((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) → ((𝑥 ·ℎ 𝐵) ·ih 𝐵) = (𝑥 · (𝐵 ·ih 𝐵))) |
| 8 | 3, 7 | sylan9eqr 2790 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → (𝐴 ·ih 𝐵) = (𝑥 · (𝐵 ·ih 𝐵))) |
| 9 | normsq 31118 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℋ → ((normℎ‘𝐵)↑2) = (𝐵 ·ih 𝐵)) | |
| 10 | 9 | ad2antrr 726 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((normℎ‘𝐵)↑2) = (𝐵 ·ih 𝐵)) |
| 11 | 8, 10 | oveq12d 7372 | . . . . . . . 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 719 | . . . . . . 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 484 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ) | |
| 14 | hicl 31064 | . . . . . . . . . . 11 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (𝐵 ·ih 𝐵) ∈ ℂ) | |
| 15 | 14 | anidms 566 | . . . . . . . . . 10 ⊢ (𝐵 ∈ ℋ → (𝐵 ·ih 𝐵) ∈ ℂ) |
| 16 | 15 | ad2antrr 726 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → (𝐵 ·ih 𝐵) ∈ ℂ) |
| 17 | his6 31083 | . . . . . . . . . . . 12 ⊢ (𝐵 ∈ ℋ → ((𝐵 ·ih 𝐵) = 0 ↔ 𝐵 = 0ℎ)) | |
| 18 | 17 | necon3bid 2973 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ ℋ → ((𝐵 ·ih 𝐵) ≠ 0 ↔ 𝐵 ≠ 0ℎ)) |
| 19 | 18 | biimpar 477 | . . . . . . . . . 10 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (𝐵 ·ih 𝐵) ≠ 0) |
| 20 | 19 | adantr 480 | . . . . . . . . 9 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → (𝐵 ·ih 𝐵) ≠ 0) |
| 21 | 13, 16, 20 | divcan4d 11912 | . . . . . . . 8 ⊢ (((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) → ((𝑥 · (𝐵 ·ih 𝐵)) / (𝐵 ·ih 𝐵)) = 𝑥) |
| 22 | 21 | adantr 480 | . . . . . . 7 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((𝑥 · (𝐵 ·ih 𝐵)) / (𝐵 ·ih 𝐵)) = 𝑥) |
| 23 | 12, 22 | eqtrd 2768 | . . . . . 6 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → ((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) = 𝑥) |
| 24 | 23 | oveq1d 7369 | . . . . 5 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = (𝑥 ·ℎ 𝐵)) |
| 25 | simpr 484 | . . . . 5 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → 𝐴 = (𝑥 ·ℎ 𝐵)) | |
| 26 | 24, 25 | eqtr4d 2771 | . . . 4 ⊢ ((((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) ∧ 𝑥 ∈ ℂ) ∧ 𝐴 = (𝑥 ·ℎ 𝐵)) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴) |
| 27 | 26 | rexlimdva2 3136 | . . 3 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (∃𝑥 ∈ ℂ 𝐴 = (𝑥 ·ℎ 𝐵) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴)) |
| 28 | 2, 27 | sylbid 240 | . 2 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ) → (𝐴 ∈ (span‘{𝐵}) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴)) |
| 29 | 28 | 3impia 1117 | 1 ⊢ ((𝐵 ∈ ℋ ∧ 𝐵 ≠ 0ℎ ∧ 𝐴 ∈ (span‘{𝐵})) → (((𝐴 ·ih 𝐵) / ((normℎ‘𝐵)↑2)) ·ℎ 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2113 ≠ wne 2929 ∃wrex 3057 {csn 4577 ‘cfv 6488 (class class class)co 7354 ℂcc 11013 0cc0 11015 · cmul 11020 / cdiv 11783 2c2 12189 ↑cexp 13972 ℋchba 30903 ·ℎ csm 30905 ·ih csp 30906 normℎcno 30907 0ℎc0v 30908 spancspn 30916 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-inf2 9540 ax-cc 10335 ax-cnex 11071 ax-resscn 11072 ax-1cn 11073 ax-icn 11074 ax-addcl 11075 ax-addrcl 11076 ax-mulcl 11077 ax-mulrcl 11078 ax-mulcom 11079 ax-addass 11080 ax-mulass 11081 ax-distr 11082 ax-i2m1 11083 ax-1ne0 11084 ax-1rid 11085 ax-rnegex 11086 ax-rrecex 11087 ax-cnre 11088 ax-pre-lttri 11089 ax-pre-lttrn 11090 ax-pre-ltadd 11091 ax-pre-mulgt0 11092 ax-pre-sup 11093 ax-addf 11094 ax-mulf 11095 ax-hilex 30983 ax-hfvadd 30984 ax-hvcom 30985 ax-hvass 30986 ax-hv0cl 30987 ax-hvaddid 30988 ax-hfvmul 30989 ax-hvmulid 30990 ax-hvmulass 30991 ax-hvdistr1 30992 ax-hvdistr2 30993 ax-hvmul0 30994 ax-hfi 31063 ax-his1 31066 ax-his2 31067 ax-his3 31068 ax-his4 31069 ax-hcompl 31186 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-tp 4582 df-op 4584 df-uni 4861 df-int 4900 df-iun 4945 df-iin 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-isom 6497 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-of 7618 df-om 7805 df-1st 7929 df-2nd 7930 df-supp 8099 df-frecs 8219 df-wrecs 8250 df-recs 8299 df-rdg 8337 df-1o 8393 df-2o 8394 df-oadd 8397 df-omul 8398 df-er 8630 df-map 8760 df-pm 8761 df-ixp 8830 df-en 8878 df-dom 8879 df-sdom 8880 df-fin 8881 df-fsupp 9255 df-fi 9304 df-sup 9335 df-inf 9336 df-oi 9405 df-card 9841 df-acn 9844 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-sub 11355 df-neg 11356 df-div 11784 df-nn 12135 df-2 12197 df-3 12198 df-4 12199 df-5 12200 df-6 12201 df-7 12202 df-8 12203 df-9 12204 df-n0 12391 df-z 12478 df-dec 12597 df-uz 12741 df-q 12851 df-rp 12895 df-xneg 13015 df-xadd 13016 df-xmul 13017 df-ioo 13253 df-ico 13255 df-icc 13256 df-fz 13412 df-fzo 13559 df-fl 13700 df-seq 13913 df-exp 13973 df-hash 14242 df-cj 15010 df-re 15011 df-im 15012 df-sqrt 15146 df-abs 15147 df-clim 15399 df-rlim 15400 df-sum 15598 df-struct 17062 df-sets 17079 df-slot 17097 df-ndx 17109 df-base 17125 df-ress 17146 df-plusg 17178 df-mulr 17179 df-starv 17180 df-sca 17181 df-vsca 17182 df-ip 17183 df-tset 17184 df-ple 17185 df-ds 17187 df-unif 17188 df-hom 17189 df-cco 17190 df-rest 17330 df-topn 17331 df-0g 17349 df-gsum 17350 df-topgen 17351 df-pt 17352 df-prds 17355 df-xrs 17410 df-qtop 17415 df-imas 17416 df-xps 17418 df-mre 17492 df-mrc 17493 df-acs 17495 df-mgm 18552 df-sgrp 18631 df-mnd 18647 df-submnd 18696 df-mulg 18985 df-cntz 19233 df-cmn 19698 df-psmet 21287 df-xmet 21288 df-met 21289 df-bl 21290 df-mopn 21291 df-fbas 21292 df-fg 21293 df-cnfld 21296 df-top 22812 df-topon 22829 df-topsp 22851 df-bases 22864 df-cld 22937 df-ntr 22938 df-cls 22939 df-nei 23016 df-cn 23145 df-cnp 23146 df-lm 23147 df-haus 23233 df-tx 23480 df-hmeo 23673 df-fil 23764 df-fm 23856 df-flim 23857 df-flf 23858 df-xms 24238 df-ms 24239 df-tms 24240 df-cfil 25185 df-cau 25186 df-cmet 25187 df-grpo 30477 df-gid 30478 df-ginv 30479 df-gdiv 30480 df-ablo 30529 df-vc 30543 df-nv 30576 df-va 30579 df-ba 30580 df-sm 30581 df-0v 30582 df-vs 30583 df-nmcv 30584 df-ims 30585 df-dip 30685 df-ssp 30706 df-ph 30797 df-cbn 30847 df-hnorm 30952 df-hba 30953 df-hvsub 30955 df-hlim 30956 df-hcau 30957 df-sh 31191 df-ch 31205 df-oc 31236 df-ch0 31237 df-span 31293 |
| This theorem is referenced by: pjspansn 31561 eigvec1 31946 |
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