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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 11477 | . . 3 ⊢ − :(ℂ × ℂ)⟶ℂ | |
| 2 | opelxpi 5703 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → 〈𝐴, 𝐵〉 ∈ (ℂ × ℂ)) | |
| 3 | fvco3 6988 | . . 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 7426 | . . 3 ⊢ (𝐴𝐷𝐵) = (𝐷‘〈𝐴, 𝐵〉) | |
| 6 | cnmetdval.1 | . . . 4 ⊢ 𝐷 = (abs ∘ − ) | |
| 7 | 6 | fveq1i 6889 | . . 3 ⊢ (𝐷‘〈𝐴, 𝐵〉) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 8 | 5, 7 | eqtri 2789 | . 2 ⊢ (𝐴𝐷𝐵) = ((abs ∘ − )‘〈𝐴, 𝐵〉) |
| 9 | df-ov 7426 | . . 3 ⊢ (𝐴 − 𝐵) = ( − ‘〈𝐴, 𝐵〉) | |
| 10 | 9 | fveq2i 6891 | . 2 ⊢ (abs‘(𝐴 − 𝐵)) = (abs‘( − ‘〈𝐴, 𝐵〉)) |
| 11 | 4, 8, 10 | 3eqtr4g 2826 | 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 4600 × cxp 5664 ∘ ccom 5670 ⟶wf 6539 ‘cfv 6543 (class class class)co 7423 ℂcc 11116 − cmin 11459 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 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-po 5574 df-so 5575 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-1st 7995 df-2nd 7996 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-ltxr 11266 df-sub 11461 |
| This theorem is used by: cnmet 24965 cnbl0 24967 cnblcld 24968 cnfldnm 24972 remetdval 24983 blcvx 24992 recld2 25009 zdis 25011 reperflem 25013 addcnlem 25059 divcn 25064 cncfmet 25105 cnheibor 25151 cnllycmp 25152 ipcn 25442 lmclim 25499 cncmet 25518 ovolfsval 25666 ellimc3 26075 lhop1lem 26209 ftc1lem6 26237 ulmdvlem1 26600 psercn 26626 pserdvlem2 26628 abelthlem2 26632 abelthlem3 26633 abelthlem5 26635 abelthlem7 26638 abelth 26641 dvlog2lem 26854 efopn 26860 logtayl 26862 logtayl2 26864 cxpcn3 26950 rlimcnp 27167 xrlimcnp 27170 efrlim 27171 lgamucov 27239 lgamcvg2 27256 ftalem3 27276 smcnlem 31086 hhcnf 32294 tpr2rico 34333 qqhcn 34412 qqhucn 34413 ftc1cnnc 38383 cntotbnd 38487 iccbnd 38531 cnmetcoval 45959 iooabslt 46255 limcrecl 46385 islpcn 46393 stirlinglem5 46832 ovolval2lem 47397 ovolval3 47401 |
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