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Mirrors > Home > HSE Home > Th. List > normsq | Structured version Visualization version GIF version |
Description: The square of a norm. (Contributed by NM, 12-May-2005.) (New usage is discouraged.) |
Ref | Expression |
---|---|
normsq | โข (๐ด โ โ โ ((normโโ๐ด)โ2) = (๐ด ยทih ๐ด)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6890 | . . . 4 โข (๐ด = if(๐ด โ โ, ๐ด, 0โ) โ (normโโ๐ด) = (normโโif(๐ด โ โ, ๐ด, 0โ))) | |
2 | 1 | oveq1d 7426 | . . 3 โข (๐ด = if(๐ด โ โ, ๐ด, 0โ) โ ((normโโ๐ด)โ2) = ((normโโif(๐ด โ โ, ๐ด, 0โ))โ2)) |
3 | id 22 | . . . 4 โข (๐ด = if(๐ด โ โ, ๐ด, 0โ) โ ๐ด = if(๐ด โ โ, ๐ด, 0โ)) | |
4 | 3, 3 | oveq12d 7429 | . . 3 โข (๐ด = if(๐ด โ โ, ๐ด, 0โ) โ (๐ด ยทih ๐ด) = (if(๐ด โ โ, ๐ด, 0โ) ยทih if(๐ด โ โ, ๐ด, 0โ))) |
5 | 2, 4 | eqeq12d 2746 | . 2 โข (๐ด = if(๐ด โ โ, ๐ด, 0โ) โ (((normโโ๐ด)โ2) = (๐ด ยทih ๐ด) โ ((normโโif(๐ด โ โ, ๐ด, 0โ))โ2) = (if(๐ด โ โ, ๐ด, 0โ) ยทih if(๐ด โ โ, ๐ด, 0โ)))) |
6 | ifhvhv0 30542 | . . 3 โข if(๐ด โ โ, ๐ด, 0โ) โ โ | |
7 | 6 | normsqi 30652 | . 2 โข ((normโโif(๐ด โ โ, ๐ด, 0โ))โ2) = (if(๐ด โ โ, ๐ด, 0โ) ยทih if(๐ด โ โ, ๐ด, 0โ)) |
8 | 5, 7 | dedth 4585 | 1 โข (๐ด โ โ โ ((normโโ๐ด)โ2) = (๐ด ยทih ๐ด)) |
Colors of variables: wff setvar class |
Syntax hints: โ wi 4 = wceq 1539 โ wcel 2104 ifcif 4527 โcfv 6542 (class class class)co 7411 2c2 12271 โcexp 14031 โchba 30439 ยทih csp 30442 normโcno 30443 0โc0v 30444 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-hv0cl 30523 ax-hvmul0 30530 ax-hfi 30599 ax-his1 30602 ax-his3 30604 ax-his4 30605 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-sup 9439 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-rp 12979 df-seq 13971 df-exp 14032 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-hnorm 30488 |
This theorem is referenced by: pjhthlem1 30911 normcan 31096 unopnorm 31437 lnopunilem1 31530 riesz4i 31583 cnlnadjlem7 31593 nmopcoadji 31621 branmfn 31625 leopnmid 31658 hstoh 31752 |
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