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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 12318 | . . 3 ⊢ -1 ∈ ℂ | |
| 2 | normsub.2 | . . . 4 ⊢ 𝐵 ∈ ℋ | |
| 3 | normsub.1 | . . . 4 ⊢ 𝐴 ∈ ℋ | |
| 4 | 2, 3 | hvsubcli 31638 | . . 3 ⊢ (𝐵 −ℎ 𝐴) ∈ ℋ |
| 5 | 1, 4 | norm-iii-i 31756 | . 2 ⊢ (normℎ‘( -1 ·ℎ (𝐵 −ℎ 𝐴))) = ((abs‘ -1) · (normℎ‘(𝐵 −ℎ 𝐴))) |
| 6 | 2, 3 | hvnegdii 31679 | . . 3 ⊢ ( -1 ·ℎ (𝐵 −ℎ 𝐴)) = (𝐴 −ℎ 𝐵) |
| 7 | 6 | fveq2i 6899 | . 2 ⊢ (normℎ‘( -1 ·ℎ (𝐵 −ℎ 𝐴))) = (normℎ‘(𝐴 −ℎ 𝐵)) |
| 8 | ax-1cn 11271 | . . . . . 6 ⊢ 1 ∈ ℂ | |
| 9 | 8 | absnegi 15583 | . . . . 5 ⊢ (abs‘ -1) = (abs‘1) |
| 10 | abs1 15479 | . . . . 5 ⊢ (abs‘1) = 1 | |
| 11 | 9, 10 | eqtri 2786 | . . . 4 ⊢ (abs‘ -1) = 1 |
| 12 | 11 | oveq1i 7440 | . . 3 ⊢ ((abs‘ -1) · (normℎ‘(𝐵 −ℎ 𝐴))) = (1 · (normℎ‘(𝐵 −ℎ 𝐴))) |
| 13 | 4 | normcli 31748 | . . . . 5 ⊢ (normℎ‘(𝐵 −ℎ 𝐴)) ∈ ℝ |
| 14 | 13 | recni 11336 | . . . 4 ⊢ (normℎ‘(𝐵 −ℎ 𝐴)) ∈ ℂ |
| 15 | 14 | mullidi 11327 | . . 3 ⊢ (1 · (normℎ‘(𝐵 −ℎ 𝐴))) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| 16 | 12, 15 | eqtri 2786 | . 2 ⊢ ((abs‘ -1) · (normℎ‘(𝐵 −ℎ 𝐴))) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| 17 | 5, 7, 16 | 3eqtr3i 2794 | 1 ⊢ (normℎ‘(𝐴 −ℎ 𝐵)) = (normℎ‘(𝐵 −ℎ 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ∈ wcel 2146 ‘cfv 6547 (class class class)co 7430 1c1 11214 · cmul 11218 -cneg 11555 abscabs 15416 ℋchba 31536 ·ℎ csm 31538 normℎcno 31540 −ℎ cmv 31542 |
| 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 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-addrcl 11274 ax-mulcl 11275 ax-mulrcl 11276 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-i2m1 11281 ax-1ne0 11282 ax-1rid 11283 ax-rnegex 11284 ax-rrecex 11285 ax-cnre 11286 ax-pre-lttri 11287 ax-pre-lttrn 11288 ax-pre-ltadd 11289 ax-pre-mulgt0 11290 ax-pre-sup 11291 ax-hfvadd 31617 ax-hvcom 31618 ax-hv0cl 31620 ax-hfvmul 31622 ax-hvmulid 31623 ax-hvmulass 31624 ax-hvdistr1 31625 ax-hvmul0 31627 ax-hfi 31696 ax-his1 31699 ax-his3 31701 ax-his4 31702 |
| 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 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7888 df-2nd 8012 df-frecs 8313 df-wrecs 8344 df-recs 8393 df-rdg 8432 df-er 8731 df-en 8988 df-dom 8989 df-sdom 8990 df-sup 9447 df-pnf 11358 df-mnf 11359 df-xr 11360 df-ltxr 11361 df-le 11362 df-sub 11556 df-neg 11557 df-div 11987 df-nn 12349 df-2 12418 df-3 12419 df-n0 12620 df-z 12707 df-uz 12979 df-rp 13134 df-seq 14158 df-exp 14218 df-cj 15281 df-re 15282 df-im 15283 df-sqrt 15417 df-abs 15418 df-hnorm 31585 df-hvsub 31588 |
| This theorem is used by: normsub 31760 norm3adifii 31765 |
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