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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 20601 | . . . . . . . 8 ⊢ ℂfld ∈ Ring | |
2 | cnfldbas 20582 | . . . . . . . . 9 ⊢ ℂ = (Base‘ℂfld) | |
3 | cnfld0 20603 | . . . . . . . . . 10 ⊢ 0 = (0g‘ℂfld) | |
4 | cndrng 20608 | . . . . . . . . . 10 ⊢ ℂfld ∈ DivRing | |
5 | 2, 3, 4 | drngui 19978 | . . . . . . . . 9 ⊢ (ℂ ∖ {0}) = (Unit‘ℂfld) |
6 | eqid 2739 | . . . . . . . . 9 ⊢ (/r‘ℂfld) = (/r‘ℂfld) | |
7 | cnfldmul 20584 | . . . . . . . . 9 ⊢ · = (.r‘ℂfld) | |
8 | 2, 5, 6, 7 | dvrcan1 19914 | . . . . . . . 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 7283 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (((𝑥(/r‘ℂfld)𝑦) · 𝑦) / 𝑦) = (𝑥 / 𝑦)) |
11 | 2, 5, 6 | dvrcl 19909 | . . . . . . . 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 4725 | . . . . . . . . 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 11740 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (((𝑥(/r‘ℂfld)𝑦) · 𝑦) / 𝑦) = (𝑥(/r‘ℂfld)𝑦)) |
19 | 10, 18 | eqtr3d 2781 | . . . . 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 11618 | . . . . . 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 2781 | . . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥(/r‘ℂfld)𝑦) = (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) |
24 | eqid 2739 | . . . . 5 ⊢ (invr‘ℂfld) = (invr‘ℂfld) | |
25 | 2, 7, 5, 24, 6 | dvrval 19908 | . . . 4 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥(/r‘ℂfld)𝑦) = (𝑥 · ((invr‘ℂfld)‘𝑦))) |
26 | 23, 25 | eqtr3d 2781 | . . 3 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ (ℂ ∖ {0})) → (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥) = (𝑥 · ((invr‘ℂfld)‘𝑦))) |
27 | 26 | mpoeq3ia 7344 | . 2 ⊢ (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · ((invr‘ℂfld)‘𝑦))) |
28 | df-div 11616 | . 2 ⊢ / = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (℩𝑧 ∈ ℂ (𝑦 · 𝑧) = 𝑥)) | |
29 | 2, 7, 5, 24, 6 | dvrfval 19907 | . 2 ⊢ (/r‘ℂfld) = (𝑥 ∈ ℂ, 𝑦 ∈ (ℂ ∖ {0}) ↦ (𝑥 · ((invr‘ℂfld)‘𝑦))) |
30 | 27, 28, 29 | 3eqtr4i 2777 | 1 ⊢ / = (/r‘ℂfld) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1541 ∈ wcel 2109 ≠ wne 2944 ∖ cdif 3888 {csn 4566 ‘cfv 6430 ℩crio 7224 (class class class)co 7268 ∈ cmpo 7270 ℂcc 10853 0cc0 10855 · cmul 10860 / cdiv 11615 Ringcrg 19764 invrcinvr 19894 /rcdvr 19905 ℂfldccnfld 20578 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 ax-addf 10934 ax-mulf 10935 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-1st 7817 df-2nd 7818 df-tpos 8026 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-1o 8281 df-er 8472 df-en 8708 df-dom 8709 df-sdom 8710 df-fin 8711 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-nn 11957 df-2 12019 df-3 12020 df-4 12021 df-5 12022 df-6 12023 df-7 12024 df-8 12025 df-9 12026 df-n0 12217 df-z 12303 df-dec 12420 df-uz 12565 df-fz 13222 df-struct 16829 df-sets 16846 df-slot 16864 df-ndx 16876 df-base 16894 df-ress 16923 df-plusg 16956 df-mulr 16957 df-starv 16958 df-tset 16962 df-ple 16963 df-ds 16965 df-unif 16966 df-0g 17133 df-mgm 18307 df-sgrp 18356 df-mnd 18367 df-grp 18561 df-minusg 18562 df-cmn 19369 df-mgp 19702 df-ur 19719 df-ring 19766 df-cring 19767 df-oppr 19843 df-dvdsr 19864 df-unit 19865 df-invr 19895 df-dvr 19906 df-drng 19974 df-cnfld 20579 |
This theorem is referenced by: cnfldinv 20610 cnsubdrglem 20630 qsssubdrg 20638 redvr 20803 cvsdiv 24276 qrngdiv 26753 |
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