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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 11476 | . . 3 ⊢ − :(ℂ × ℂ)⟶ℂ | |
| 2 | opelxpi 5700 | . . 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 7422 | . . 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 2788 | . 2 ⊢ (𝐴𝐷𝐵) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 9 | df-ov 7422 | . . 3 ⊢ (𝐴 − 𝐵) = ( − ‘〈𝐴, 𝐵〉) | |
| 10 | 9 | fveq2i 6888 | . 2 ⊢ (abs‘(𝐴 − 𝐵)) = (abs‘( − ‘〈𝐴, 𝐵〉)) |
| 11 | 4, 8, 10 | 3eqtr4g 2825 | 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 2146 〈cop 4597 × cxp 5661 ∘ ccom 5667 ⟶wf 6536 ‘cfv 6540 (class class class)co 7419 ℂcc 11115 − cmin 11458 abscabs 15311 |
| 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 7742 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-addrcl 11178 ax-mulcl 11179 ax-mulrcl 11180 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-i2m1 11185 ax-1ne0 11186 ax-1rid 11187 ax-rnegex 11188 ax-rrecex 11189 ax-cnre 11190 ax-pre-lttri 11191 ax-pre-lttrn 11192 ax-pre-ltadd 11193 |
| 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-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-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-id 5558 df-po 5571 df-so 5572 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-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-1st 7992 df-2nd 7993 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-pnf 11262 df-mnf 11263 df-ltxr 11265 df-sub 11460 |
| This theorem is used by: cnmet 24981 cnbl0 24983 cnblcld 24984 cnfldnm 24988 remetdval 24999 blcvx 25008 recld2 25025 zdis 25027 reperflem 25029 addcnlem 25075 divcn 25080 cncfmet 25121 cnheibor 25167 cnllycmp 25168 ipcn 25458 lmclim 25515 cncmet 25534 ovolfsval 25682 ellimc3 26091 lhop1lem 26225 ftc1lem6 26253 ulmdvlem1 26616 psercn 26642 pserdvlem2 26644 abelthlem2 26648 abelthlem3 26649 abelthlem5 26651 abelthlem7 26654 abelth 26657 dvlog2lem 26870 efopn 26876 logtayl 26878 logtayl2 26880 cxpcn3 26966 rlimcnp 27183 xrlimcnp 27186 efrlim 27187 lgamucov 27255 lgamcvg2 27272 ftalem3 27292 smcnlem 31122 hhcnf 32330 tpr2rico 34368 qqhcn 34447 qqhucn 34448 ftc1cnnc 38402 cntotbnd 38507 iccbnd 38551 cnmetcoval 45979 iooabslt 46275 limcrecl 46405 islpcn 46413 stirlinglem5 46852 ovolval2lem 47417 ovolval3 47421 |
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