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Mirrors > Home > MPE Home > Th. List > cnflddiv | Structured version Visualization version GIF version |
Description: The division operation in the field of complex numbers. (Contributed by Stefan O'Rear, 27-Nov-2014.) (Revised by Mario Carneiro, 2-Dec-2014.) |
Ref | Expression |
---|---|
cnflddiv | ⊢ / = (/r‘ℂfld) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnring 20532 | . . . . . . . 8 ⊢ ℂfld ∈ Ring | |
2 | cnfldbas 20514 | . . . . . . . . 9 ⊢ ℂ = (Base‘ℂfld) | |
3 | cnfld0 20534 | . . . . . . . . . 10 ⊢ 0 = (0g‘ℂfld) | |
4 | cndrng 20539 | . . . . . . . . . 10 ⊢ ℂfld ∈ DivRing | |
5 | 2, 3, 4 | drngui 19912 | . . . . . . . . 9 ⊢ (ℂ ∖ {0}) = (Unit‘ℂfld) |
6 | eqid 2738 | . . . . . . . . 9 ⊢ (/r‘ℂfld) = (/r‘ℂfld) | |
7 | cnfldmul 20516 | . . . . . . . . 9 ⊢ · = (.r‘ℂfld) | |
8 | 2, 5, 6, 7 | dvrcan1 19848 | . . . . . . . 8 ⊢ ((ℂfld ∈ Ring ∧ 𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → ((𝑥(/r‘ℂfld)𝑦) · 𝑦) = 𝑥) |
9 | 1, 8 | mp3an1 1446 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → ((𝑥(/r‘ℂfld)𝑦) · 𝑦) = 𝑥) |
10 | 9 | oveq1d 7270 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (((𝑥(/r‘ℂfld)𝑦) · 𝑦) / 𝑦) = (𝑥 / 𝑦)) |
11 | 2, 5, 6 | dvrcl 19843 | . . . . . . . 8 ⊢ ((ℂfld ∈ Ring ∧ 𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥(/r‘ℂfld)𝑦) ∈ ℂ) |
12 | 1, 11 | mp3an1 1446 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥(/r‘ℂfld)𝑦) ∈ ℂ) |
13 | simpr 484 | . . . . . . . . 9 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑦 ∈ (ℂ ∖ {0})) | |
14 | eldifsn 4717 | . . . . . . . . 9 ⊢ (𝑦 ∈ (ℂ ∖ {0}) ↔ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) | |
15 | 13, 14 | sylib 217 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) |
16 | 15 | simpld 494 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑦 ∈ ℂ) |
17 | 15 | simprd 495 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑦 ≠ 0) |
18 | 12, 16, 17 | divcan4d 11687 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (((𝑥(/r‘ℂfld)𝑦) · 𝑦) / 𝑦) = (𝑥(/r‘ℂfld)𝑦)) |
19 | 10, 18 | eqtr3d 2780 | . . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 / 𝑦) = (𝑥(/r‘ℂfld)𝑦)) |
20 | simpl 482 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑥 ∈ ℂ) | |
21 | divval 11565 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ ∧ 𝑦 ≠ 0) → (𝑥 / 𝑦) = (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) | |
22 | 20, 16, 17, 21 | syl3anc 1369 | . . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 / 𝑦) = (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) |
23 | 19, 22 | eqtr3d 2780 | . . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥(/r‘ℂfld)𝑦) = (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) |
24 | eqid 2738 | . . . . 5 ⊢ (invr‘ℂfld) = (invr‘ℂfld) | |
25 | 2, 7, 5, 24, 6 | dvrval 19842 | . . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥(/r‘ℂfld)𝑦) = (𝑥 · ((invr‘ℂfld)‘𝑦))) |
26 | 23, 25 | eqtr3d 2780 | . . 3 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥) = (𝑥 · ((invr‘ℂfld)‘𝑦))) |
27 | 26 | mpoeq3ia 7331 | . 2 ⊢ (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · ((invr‘ℂfld)‘𝑦))) |
28 | df-div 11563 | . 2 ⊢ / = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) | |
29 | 2, 7, 5, 24, 6 | dvrfval 19841 | . 2 ⊢ (/r‘ℂfld) = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · ((invr‘ℂfld)‘𝑦))) |
30 | 27, 28, 29 | 3eqtr4i 2776 | 1 ⊢ / = (/r‘ℂfld) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∖ cdif 3880 {csn 4558 ‘cfv 6418 ℩crio 7211 (class class class)co 7255 ∈ cmpo 7257 ℂcc 10800 0cc0 10802 · cmul 10807 / cdiv 11562 Ringcrg 19698 invrcinvr 19828 /rcdvr 19839 ℂfldccnfld 20510 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-addf 10881 ax-mulf 10882 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-tpos 8013 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-fz 13169 df-struct 16776 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-starv 16903 df-tset 16907 df-ple 16908 df-ds 16910 df-unif 16911 df-0g 17069 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-grp 18495 df-minusg 18496 df-cmn 19303 df-mgp 19636 df-ur 19653 df-ring 19700 df-cring 19701 df-oppr 19777 df-dvdsr 19798 df-unit 19799 df-invr 19829 df-dvr 19840 df-drng 19908 df-cnfld 20511 |
This theorem is referenced by: cnfldinv 20541 cnsubdrglem 20561 qsssubdrg 20569 redvr 20734 cvsdiv 24201 qrngdiv 26677 |
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