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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 31431 | . . 3 ⊢ 0ℎ ∈ ℋ | |
| 2 | normsub 31571 | . . 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 31456 | . . 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 31504 | . . 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 2808 | 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 2146 ‘cfv 6541 (class class class)co 7420 1c1 11121 -cneg 11462 ℋchba 31347 ·ℎ csm 31349 normℎcno 31351 0ℎc0v 31352 −ℎ cmv 31353 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7743 ax-cnex 11176 ax-resscn 11177 ax-1cn 11178 ax-icn 11179 ax-addcl 11180 ax-addrcl 11181 ax-mulcl 11182 ax-mulrcl 11183 ax-mulcom 11184 ax-addass 11185 ax-mulass 11186 ax-distr 11187 ax-i2m1 11188 ax-1ne0 11189 ax-1rid 11190 ax-rnegex 11191 ax-rrecex 11192 ax-cnre 11193 ax-pre-lttri 11194 ax-pre-lttrn 11195 ax-pre-ltadd 11196 ax-pre-mulgt0 11197 ax-pre-sup 11198 ax-hfvadd 31428 ax-hvcom 31429 ax-hv0cl 31431 ax-hvaddid 31432 ax-hfvmul 31433 ax-hvmulid 31434 ax-hvmulass 31435 ax-hvdistr1 31436 ax-hvmul0 31438 ax-hfi 31507 ax-his1 31510 ax-his3 31512 ax-his4 31513 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7870 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-er 8701 df-en 8951 df-dom 8952 df-sdom 8953 df-sup 9410 df-pnf 11265 df-mnf 11266 df-xr 11267 df-ltxr 11268 df-le 11269 df-sub 11463 df-neg 11464 df-div 11892 df-nn 12254 df-2 12323 df-3 12324 df-n0 12525 df-z 12612 df-uz 12884 df-rp 13038 df-seq 14061 df-exp 14121 df-cj 15179 df-re 15180 df-im 15181 df-sqrt 15315 df-abs 15316 df-hnorm 31396 df-hvsub 31399 |
| This theorem is used by: nmopnegi 32393 cdj3lem1 32862 |
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