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| Mirrors > Home > HSE Home > Th. List > normneg | Structured version Visualization version GIF version | ||
| Description: The norm of a vector equals the norm of its negative. (Contributed by NM, 23-May-2005.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| normneg | ⊢ (𝐴 ∈ ℋ → (normℎ‘(-1 ·ℎ 𝐴)) = (normℎ‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-hv0cl 31516 | . . 3 ⊢ 0ℎ ∈ ℋ | |
| 2 | normsub 31656 | . . 3 ⊢ ((0ℎ ∈ ℋ ∧ 𝐴 ∈ ℋ) → (normℎ‘(0ℎ −ℎ 𝐴)) = (normℎ‘(𝐴 −ℎ 0ℎ))) | |
| 3 | 1, 2 | mpan 703 | . 2 ⊢ (𝐴 ∈ ℋ → (normℎ‘(0ℎ −ℎ 𝐴)) = (normℎ‘(𝐴 −ℎ 0ℎ))) |
| 4 | hv2neg 31541 | . . 3 ⊢ (𝐴 ∈ ℋ → (0ℎ −ℎ 𝐴) = (-1 ·ℎ 𝐴)) | |
| 5 | 4 | fveq2d 6885 | . 2 ⊢ (𝐴 ∈ ℋ → (normℎ‘(0ℎ −ℎ 𝐴)) = (normℎ‘(-1 ·ℎ 𝐴))) |
| 6 | hvsub0 31589 | . . 3 ⊢ (𝐴 ∈ ℋ → (𝐴 −ℎ 0ℎ) = 𝐴) | |
| 7 | 6 | fveq2d 6885 | . 2 ⊢ (𝐴 ∈ ℋ → (normℎ‘(𝐴 −ℎ 0ℎ)) = (normℎ‘𝐴)) |
| 8 | 3, 5, 7 | 3eqtr3d 2803 | 1 ⊢ (𝐴 ∈ ℋ → (normℎ‘(-1 ·ℎ 𝐴)) = (normℎ‘𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ‘cfv 6535 (class class class)co 7416 1c1 11150 -cneg 11491 ℋchba 31432 ·ℎ csm 31434 normℎcno 31436 0ℎc0v 31437 −ℎ cmv 31438 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7742 ax-cnex 11205 ax-resscn 11206 ax-1cn 11207 ax-icn 11208 ax-addcl 11209 ax-addrcl 11210 ax-mulcl 11211 ax-mulrcl 11212 ax-mulcom 11213 ax-addass 11214 ax-mulass 11215 ax-distr 11216 ax-i2m1 11217 ax-1ne0 11218 ax-1rid 11219 ax-rnegex 11220 ax-rrecex 11221 ax-cnre 11222 ax-pre-lttri 11223 ax-pre-lttrn 11224 ax-pre-ltadd 11225 ax-pre-mulgt0 11226 ax-pre-sup 11227 ax-hfvadd 31513 ax-hvcom 31514 ax-hv0cl 31516 ax-hvaddid 31517 ax-hfvmul 31518 ax-hvmulid 31519 ax-hvmulass 31520 ax-hvdistr1 31521 ax-hvmul0 31523 ax-hfi 31592 ax-his1 31595 ax-his3 31597 ax-his4 31598 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 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 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 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 6301 df-ord 6362 df-on 6363 df-lim 6364 df-suc 6365 df-iota 6491 df-fun 6537 df-fn 6538 df-f 6539 df-f1 6540 df-fo 6541 df-f1o 6542 df-fv 6543 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-2nd 7993 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-er 8703 df-en 8960 df-dom 8961 df-sdom 8962 df-sup 9419 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11492 df-neg 11493 df-div 11921 df-nn 12283 df-2 12352 df-3 12353 df-n0 12554 df-z 12641 df-uz 12913 df-rp 13068 df-seq 14091 df-exp 14151 df-cj 15211 df-re 15212 df-im 15213 df-sqrt 15347 df-abs 15348 df-hnorm 31481 df-hvsub 31484 |
| This theorem is used by: nmopnegi 32478 cdj3lem1 32947 |
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