| Hilbert Space Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > HSE Home > Th. List > normsub0 | Structured version Visualization version GIF version | ||
| Description: Two vectors are equal iff the norm of their difference is zero. (Contributed by NM, 18-Aug-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| normsub0 | ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((normℎ‘(𝐴 −ℎ 𝐵)) = 0 ↔ 𝐴 = 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvoveq1 7422 | . . . 4 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (normℎ‘(𝐴 −ℎ 𝐵)) = (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵))) | |
| 2 | 1 | eqeq1d 2736 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → ((normℎ‘(𝐴 −ℎ 𝐵)) = 0 ↔ (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) = 0)) |
| 3 | eqeq1 2738 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (𝐴 = 𝐵 ↔ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = 𝐵)) | |
| 4 | 2, 3 | bibi12d 345 | . 2 ⊢ (𝐴 = if(𝐴 ∈ ℋ, 𝐴, 0ℎ) → (((normℎ‘(𝐴 −ℎ 𝐵)) = 0 ↔ 𝐴 = 𝐵) ↔ ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) = 0 ↔ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = 𝐵))) |
| 5 | oveq2 7407 | . . . 4 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵) = (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) | |
| 6 | 5 | fveqeq2d 6880 | . . 3 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) = 0 ↔ (normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) = 0)) |
| 7 | eqeq2 2746 | . . 3 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = 𝐵 ↔ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) | |
| 8 | 6, 7 | bibi12d 345 | . 2 ⊢ (𝐵 = if(𝐵 ∈ ℋ, 𝐵, 0ℎ) → (((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ 𝐵)) = 0 ↔ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = 𝐵) ↔ ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) = 0 ↔ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = if(𝐵 ∈ ℋ, 𝐵, 0ℎ)))) |
| 9 | ifhvhv0 30935 | . . 3 ⊢ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) ∈ ℋ | |
| 10 | ifhvhv0 30935 | . . 3 ⊢ if(𝐵 ∈ ℋ, 𝐵, 0ℎ) ∈ ℋ | |
| 11 | 9, 10 | normsub0i 31048 | . 2 ⊢ ((normℎ‘(if(𝐴 ∈ ℋ, 𝐴, 0ℎ) −ℎ if(𝐵 ∈ ℋ, 𝐵, 0ℎ))) = 0 ↔ if(𝐴 ∈ ℋ, 𝐴, 0ℎ) = if(𝐵 ∈ ℋ, 𝐵, 0ℎ)) |
| 12 | 4, 8, 11 | dedth2h 4558 | 1 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((normℎ‘(𝐴 −ℎ 𝐵)) = 0 ↔ 𝐴 = 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1539 ∈ wcel 2107 ifcif 4498 ‘cfv 6527 (class class class)co 7399 0cc0 11121 ℋchba 30832 normℎcno 30836 0ℎc0v 30837 −ℎ cmv 30838 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-sep 5263 ax-nul 5273 ax-pow 5332 ax-pr 5399 ax-un 7723 ax-cnex 11177 ax-resscn 11178 ax-1cn 11179 ax-icn 11180 ax-addcl 11181 ax-addrcl 11182 ax-mulcl 11183 ax-mulrcl 11184 ax-mulcom 11185 ax-addass 11186 ax-mulass 11187 ax-distr 11188 ax-i2m1 11189 ax-1ne0 11190 ax-1rid 11191 ax-rnegex 11192 ax-rrecex 11193 ax-cnre 11194 ax-pre-lttri 11195 ax-pre-lttrn 11196 ax-pre-ltadd 11197 ax-pre-mulgt0 11198 ax-pre-sup 11199 ax-hfvadd 30913 ax-hvcom 30914 ax-hvass 30915 ax-hv0cl 30916 ax-hvaddid 30917 ax-hfvmul 30918 ax-hvmulid 30919 ax-hvdistr2 30922 ax-hvmul0 30923 ax-hfi 30992 ax-his1 30995 ax-his3 30997 ax-his4 30998 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-nel 3036 df-ral 3051 df-rex 3060 df-rmo 3357 df-reu 3358 df-rab 3414 df-v 3459 df-sbc 3764 df-csb 3873 df-dif 3927 df-un 3929 df-in 3931 df-ss 3941 df-pss 3944 df-nul 4307 df-if 4499 df-pw 4575 df-sn 4600 df-pr 4602 df-op 4606 df-uni 4881 df-iun 4966 df-br 5117 df-opab 5179 df-mpt 5199 df-tr 5227 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 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 6287 df-ord 6352 df-on 6353 df-lim 6354 df-suc 6355 df-iota 6480 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7356 df-ov 7402 df-oprab 7403 df-mpo 7404 df-om 7856 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8379 df-rdg 8418 df-er 8713 df-en 8954 df-dom 8955 df-sdom 8956 df-sup 9448 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11460 df-neg 11461 df-div 11887 df-nn 12233 df-2 12295 df-3 12296 df-n0 12494 df-z 12581 df-uz 12845 df-rp 13001 df-seq 14009 df-exp 14069 df-cj 15105 df-re 15106 df-im 15107 df-sqrt 15241 df-hnorm 30881 df-hvsub 30884 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |