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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 31606 | . . 3 ⊢ 0ℎ ∈ ℋ | |
| 2 | normsub 31746 | . . 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 31631 | . . 3 ⊢ (𝐴 ∈ ℋ → (0ℎ −ℎ 𝐴) = ( -1 ·ℎ 𝐴)) | |
| 5 | 4 | fveq2d 6890 | . 2 ⊢ (𝐴 ∈ ℋ → (normℎ‘(0ℎ −ℎ 𝐴)) = (normℎ‘( -1 ·ℎ 𝐴))) |
| 6 | hvsub0 31679 | . . 3 ⊢ (𝐴 ∈ ℋ → (𝐴 −ℎ 0ℎ) = 𝐴) | |
| 7 | 6 | fveq2d 6890 | . 2 ⊢ (𝐴 ∈ ℋ → (normℎ‘(𝐴 −ℎ 0ℎ)) = (normℎ‘𝐴)) |
| 8 | 3, 5, 7 | 3eqtr3d 2804 | 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 6539 (class class class)co 7421 1c1 11202 -cneg 11543 ℋchba 31522 ·ℎ csm 31524 normℎcno 31526 0ℎc0v 31527 −ℎ cmv 31528 |
| 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 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 ax-pre-sup 11279 ax-hfvadd 31603 ax-hvcom 31604 ax-hv0cl 31606 ax-hvaddid 31607 ax-hfvmul 31608 ax-hvmulid 31609 ax-hvmulass 31610 ax-hvdistr1 31611 ax-hvmul0 31613 ax-hfi 31682 ax-his1 31685 ax-his3 31687 ax-his4 31688 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 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 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-2nd 8003 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-er 8718 df-en 8975 df-dom 8976 df-sdom 8977 df-sup 9435 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-div 11975 df-nn 12337 df-2 12406 df-3 12407 df-n0 12608 df-z 12695 df-uz 12967 df-rp 13122 df-seq 14146 df-exp 14206 df-cj 15267 df-re 15268 df-im 15269 df-sqrt 15403 df-abs 15404 df-hnorm 31571 df-hvsub 31574 |
| This theorem is used by: nmopnegi 32568 cdj3lem1 33037 |
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