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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 11569 | . . 3 ⊢ − :(ℂ × ℂ)⟶ℂ | |
| 2 | opelxpi 5691 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → 〈𝐴, 𝐵〉 ∈ (ℂ × ℂ)) | |
| 3 | fvco3 6993 | . . 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 7430 | . . 3 ⊢ (𝐴𝐷𝐵) = (𝐷‘〈𝐴, 𝐵〉) | |
| 6 | cnmetdval.1 | . . . 4 ⊢ 𝐷 = (abs ∘ − ) | |
| 7 | 6 | fveq1i 6894 | . . 3 ⊢ (𝐷‘〈𝐴, 𝐵〉) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 8 | 5, 7 | eqtri 2786 | . 2 ⊢ (𝐴𝐷𝐵) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 9 | df-ov 7430 | . . 3 ⊢ (𝐴 − 𝐵) = ( − ‘〈𝐴, 𝐵〉) | |
| 10 | 9 | fveq2i 6896 | . 2 ⊢ (abs‘(𝐴 − 𝐵)) = (abs‘( − ‘〈𝐴, 𝐵〉)) |
| 11 | 4, 8, 10 | 3eqtr4g 2823 | 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 1569 ∈ wcel 2146 〈cop 4837 × cxp 5652 ∘ ccom 5658 ⟶wf 6542 ‘cfv 6546 (class class class)co 7427 ℂcc 11208 − cmin 11551 abscabs 15413 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5251 ax-nul 5262 ax-pow 5330 ax-pr 5394 ax-un 7758 ax-resscn 11267 ax-1cn 11268 ax-icn 11269 ax-addcl 11270 ax-addrcl 11271 ax-mulcl 11272 ax-mulrcl 11273 ax-mulcom 11274 ax-addass 11275 ax-mulass 11276 ax-distr 11277 ax-i2m1 11278 ax-1ne0 11279 ax-1rid 11280 ax-rnegex 11281 ax-rrecex 11282 ax-cnre 11283 ax-pre-lttri 11284 ax-pre-lttrn 11285 ax-pre-ltadd 11286 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3369 df-rab 3416 df-v 3455 df-sbc 3742 df-csb 3851 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-iun 4955 df-br 5106 df-opab 5170 df-mpt 5189 df-id 5549 df-po 5562 df-so 5563 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6500 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-riota 7384 df-ov 7430 df-oprab 7431 df-mpo 7432 df-1st 8008 df-2nd 8009 df-er 8728 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11355 df-mnf 11356 df-ltxr 11358 df-sub 11553 |
| This theorem is used by: cnmet 25102 cnbl0 25104 cnblcld 25105 cnfldnm 25109 remetdval 25120 blcvx 25129 recld2 25146 zdis 25148 reperflem 25150 addcnlem 25196 divcn 25201 cncfmet 25242 cnheibor 25288 cnllycmp 25289 ipcn 25579 lmclim 25636 cncmet 25655 ovolfsval 25803 ellimc3 26211 lhop1lem 26345 ftc1lem6 26373 ulmdvlem1 26739 psercn 26765 pserdvlem2 26767 abelthlem2 26771 abelthlem3 26772 abelthlem5 26774 abelthlem7 26777 abelth 26780 dvlog2lem 26992 efopn 26998 logtayl 27000 logtayl2 27002 cxpcn3 27088 rlimcnp 27305 xrlimcnp 27308 efrlim 27309 lgamucov 27377 lgamcvg2 27394 ftalem3 27414 smcnlem 31311 hhcnf 32519 tpr2rico 34597 qqhcn 34676 qqhucn 34677 ftc1cnnc 38750 cntotbnd 38870 iccbnd 38914 cnmetcoval 46355 iooabslt 46650 limcrecl 46780 islpcn 46788 stirlinglem5 47227 ovolval2lem 47792 ovolval3 47796 |
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