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| Mirrors > Home > HSE Home > Th. List > normsubi | Structured version Visualization version GIF version | ||
| Description: Negative doesn't change the norm of a Hilbert space vector. (Contributed by NM, 11-Aug-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| normsub.1 | ⊢ 𝐴 ∈ ℋ |
| normsub.2 | ⊢ 𝐵 ∈ ℋ |
| Ref | Expression |
|---|---|
| normsubi | ⊢ (normℎ‘(𝐴 −ℎ 𝐵)) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | neg1cn 12128 | . . 3 ⊢ -1 ∈ ℂ | |
| 2 | normsub.2 | . . . 4 ⊢ 𝐵 ∈ ℋ | |
| 3 | normsub.1 | . . . 4 ⊢ 𝐴 ∈ ℋ | |
| 4 | 2, 3 | hvsubcli 31045 | . . 3 ⊢ (𝐵 −ℎ 𝐴) ∈ ℋ |
| 5 | 1, 4 | norm-iii-i 31163 | . 2 ⊢ (normℎ‘(-1 ·ℎ (𝐵 −ℎ 𝐴))) = ((abs‘-1) · (normℎ‘(𝐵 −ℎ 𝐴))) |
| 6 | 2, 3 | hvnegdii 31086 | . . 3 ⊢ (-1 ·ℎ (𝐵 −ℎ 𝐴)) = (𝐴 −ℎ 𝐵) |
| 7 | 6 | fveq2i 6835 | . 2 ⊢ (normℎ‘(-1 ·ℎ (𝐵 −ℎ 𝐴))) = (normℎ‘(𝐴 −ℎ 𝐵)) |
| 8 | ax-1cn 11082 | . . . . . 6 ⊢ 1 ∈ ℂ | |
| 9 | 8 | absnegi 15322 | . . . . 5 ⊢ (abs‘-1) = (abs‘1) |
| 10 | abs1 15218 | . . . . 5 ⊢ (abs‘1) = 1 | |
| 11 | 9, 10 | eqtri 2757 | . . . 4 ⊢ (abs‘-1) = 1 |
| 12 | 11 | oveq1i 7366 | . . 3 ⊢ ((abs‘-1) · (normℎ‘(𝐵 −ℎ 𝐴))) = (1 · (normℎ‘(𝐵 −ℎ 𝐴))) |
| 13 | 4 | normcli 31155 | . . . . 5 ⊢ (normℎ‘(𝐵 −ℎ 𝐴)) ∈ ℝ |
| 14 | 13 | recni 11144 | . . . 4 ⊢ (normℎ‘(𝐵 −ℎ 𝐴)) ∈ ℂ |
| 15 | 14 | mullidi 11135 | . . 3 ⊢ (1 · (normℎ‘(𝐵 −ℎ 𝐴))) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| 16 | 12, 15 | eqtri 2757 | . 2 ⊢ ((abs‘-1) · (normℎ‘(𝐵 −ℎ 𝐴))) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| 17 | 5, 7, 16 | 3eqtr3i 2765 | 1 ⊢ (normℎ‘(𝐴 −ℎ 𝐵)) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∈ wcel 2113 ‘cfv 6490 (class class class)co 7356 1c1 11025 · cmul 11029 -cneg 11363 abscabs 15155 ℋchba 30943 ·ℎ csm 30945 normℎcno 30947 −ℎ cmv 30949 |
| 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 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 ax-hfvadd 31024 ax-hvcom 31025 ax-hv0cl 31027 ax-hfvmul 31029 ax-hvmulid 31030 ax-hvmulass 31031 ax-hvdistr1 31032 ax-hvmul0 31034 ax-hfi 31103 ax-his1 31106 ax-his3 31108 ax-his4 31109 |
| 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 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-sup 9343 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-3 12207 df-n0 12400 df-z 12487 df-uz 12750 df-rp 12904 df-seq 13923 df-exp 13983 df-cj 15020 df-re 15021 df-im 15022 df-sqrt 15156 df-abs 15157 df-hnorm 30992 df-hvsub 30995 |
| This theorem is referenced by: normsub 31167 norm3adifii 31172 |
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