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| Mirrors > Home > MPE Home > Th. List > cnmetdval | Structured version Visualization version GIF version | ||
| Description: Value of the distance function of the metric space of complex numbers. (Contributed by NM, 9-Dec-2006.) (Revised by Mario Carneiro, 27-Dec-2014.) |
| Ref | Expression |
|---|---|
| cnmetdval.1 | ⊢ 𝐷 = (abs ∘ − ) |
| Ref | Expression |
|---|---|
| cnmetdval | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴𝐷𝐵) = (abs‘(𝐴 − 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | subf 11559 | . . 3 ⊢ − :(ℂ × ℂ)⟶ℂ | |
| 2 | opelxpi 5688 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → 〈𝐴, 𝐵〉 ∈ (ℂ × ℂ)) | |
| 3 | fvco3 6985 | . . 3 ⊢ (( − :(ℂ × ℂ)⟶ℂ ∧ 〈𝐴, 𝐵〉 ∈ (ℂ × ℂ)) → ((abs ∘ − )‘〈𝐴, 𝐵〉) = (abs‘( − ‘〈𝐴, 𝐵〉))) | |
| 4 | 1, 2, 3 | sylancr 599 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((abs ∘ − )‘〈𝐴, 𝐵〉) = (abs‘( − ‘〈𝐴, 𝐵〉))) |
| 5 | df-ov 7423 | . . 3 ⊢ (𝐴𝐷𝐵) = (𝐷‘〈𝐴, 𝐵〉) | |
| 6 | cnmetdval.1 | . . . 4 ⊢ 𝐷 = (abs ∘ − ) | |
| 7 | 6 | fveq1i 6886 | . . 3 ⊢ (𝐷‘〈𝐴, 𝐵〉) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 8 | 5, 7 | eqtri 2784 | . 2 ⊢ (𝐴𝐷𝐵) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 9 | df-ov 7423 | . . 3 ⊢ (𝐴 − 𝐵) = ( − ‘〈𝐴, 𝐵〉) | |
| 10 | 9 | fveq2i 6888 | . 2 ⊢ (abs‘(𝐴 − 𝐵)) = (abs‘( − ‘〈𝐴, 𝐵〉)) |
| 11 | 4, 8, 10 | 3eqtr4g 2821 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴𝐷𝐵) = (abs‘(𝐴 − 𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 〈cop 4590 × cxp 5649 ∘ ccom 5655 ⟶wf 6534 ‘cfv 6538 (class class class)co 7420 ℂcc 11198 − cmin 11541 abscabs 15401 |
| 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 7751 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 |
| 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-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 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-id 5546 df-po 5559 df-so 5560 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-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-ltxr 11348 df-sub 11543 |
| This theorem is used by: cnmet 25090 cnbl0 25092 cnblcld 25093 cnfldnm 25097 remetdval 25108 blcvx 25117 recld2 25134 zdis 25136 reperflem 25138 addcnlem 25184 divcn 25189 cncfmet 25230 cnheibor 25276 cnllycmp 25277 ipcn 25567 lmclim 25624 cncmet 25643 ovolfsval 25791 ellimc3 26199 lhop1lem 26333 ftc1lem6 26361 ulmdvlem1 26727 psercn 26753 pserdvlem2 26755 abelthlem2 26759 abelthlem3 26760 abelthlem5 26762 abelthlem7 26765 abelth 26768 dvlog2lem 26980 efopn 26986 logtayl 26988 logtayl2 26990 cxpcn3 27076 rlimcnp 27293 xrlimcnp 27296 efrlim 27297 lgamucov 27365 lgamcvg2 27382 ftalem3 27402 smcnlem 31299 hhcnf 32507 tpr2rico 34544 qqhcn 34623 qqhucn 34624 ftc1cnnc 38610 cntotbnd 38730 iccbnd 38774 cnmetcoval 46215 iooabslt 46510 limcrecl 46640 islpcn 46648 stirlinglem5 47087 ovolval2lem 47652 ovolval3 47656 |
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