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| Mirrors > Home > MPE Home > Th. List > qrngdiv | Structured version Visualization version GIF version | ||
| Description: The division operation in the field of rationals. (Contributed by Mario Carneiro, 8-Sep-2014.) |
| Ref | Expression |
|---|---|
| qrng.q | ⊢ 𝑄 = (ℂfld ↾s ℚ) |
| Ref | Expression |
|---|---|
| qrngdiv | ⊢ ((𝑋 ∈ ℚ ∧ 𝑌 ∈ ℚ ∧ 𝑌 ≠ 0) → (𝑋(/r‘𝑄)𝑌) = (𝑋 / 𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | qsubdrg 21356 | . . . 4 ⊢ (ℚ ∈ (SubRing‘ℂfld) ∧ (ℂfld ↾s ℚ) ∈ DivRing) | |
| 2 | 1 | simpli 483 | . . 3 ⊢ ℚ ∈ (SubRing‘ℂfld) |
| 3 | simp1 1136 | . . 3 ⊢ ((𝑋 ∈ ℚ ∧ 𝑌 ∈ ℚ ∧ 𝑌 ≠ 0) → 𝑋 ∈ ℚ) | |
| 4 | 3simpc 1150 | . . . 4 ⊢ ((𝑋 ∈ ℚ ∧ 𝑌 ∈ ℚ ∧ 𝑌 ≠ 0) → (𝑌 ∈ ℚ ∧ 𝑌 ≠ 0)) | |
| 5 | eldifsn 4735 | . . . 4 ⊢ (𝑌 ∈ (ℚ ∖ {0}) ↔ (𝑌 ∈ ℚ ∧ 𝑌 ≠ 0)) | |
| 6 | 4, 5 | sylibr 234 | . . 3 ⊢ ((𝑋 ∈ ℚ ∧ 𝑌 ∈ ℚ ∧ 𝑌 ≠ 0) → 𝑌 ∈ (ℚ ∖ {0})) |
| 7 | qrng.q | . . . 4 ⊢ 𝑄 = (ℂfld ↾s ℚ) | |
| 8 | cnflddiv 21337 | . . . 4 ⊢ / = (/r‘ℂfld) | |
| 9 | 7 | qrngbas 27557 | . . . . 5 ⊢ ℚ = (Base‘𝑄) |
| 10 | 7 | qrng0 27559 | . . . . 5 ⊢ 0 = (0g‘𝑄) |
| 11 | 7 | qdrng 27558 | . . . . 5 ⊢ 𝑄 ∈ DivRing |
| 12 | 9, 10, 11 | drngui 20650 | . . . 4 ⊢ (ℚ ∖ {0}) = (Unit‘𝑄) |
| 13 | eqid 2731 | . . . 4 ⊢ (/r‘𝑄) = (/r‘𝑄) | |
| 14 | 7, 8, 12, 13 | subrgdv 20504 | . . 3 ⊢ ((ℚ ∈ (SubRing‘ℂfld) ∧ 𝑋 ∈ ℚ ∧ 𝑌 ∈ (ℚ ∖ {0})) → (𝑋 / 𝑌) = (𝑋(/r‘𝑄)𝑌)) |
| 15 | 2, 3, 6, 14 | mp3an2i 1468 | . 2 ⊢ ((𝑋 ∈ ℚ ∧ 𝑌 ∈ ℚ ∧ 𝑌 ≠ 0) → (𝑋 / 𝑌) = (𝑋(/r‘𝑄)𝑌)) |
| 16 | 15 | eqcomd 2737 | 1 ⊢ ((𝑋 ∈ ℚ ∧ 𝑌 ∈ ℚ ∧ 𝑌 ≠ 0) → (𝑋(/r‘𝑄)𝑌) = (𝑋 / 𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2111 ≠ wne 2928 ∖ cdif 3894 {csn 4573 ‘cfv 6481 (class class class)co 7346 0cc0 11006 / cdiv 11774 ℚcq 12846 ↾s cress 17141 /rcdvr 20318 SubRingcsubrg 20484 DivRingcdr 20644 ℂfldccnfld 21291 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 ax-cnex 11062 ax-resscn 11063 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-addrcl 11067 ax-mulcl 11068 ax-mulrcl 11069 ax-mulcom 11070 ax-addass 11071 ax-mulass 11072 ax-distr 11073 ax-i2m1 11074 ax-1ne0 11075 ax-1rid 11076 ax-rnegex 11077 ax-rrecex 11078 ax-cnre 11079 ax-pre-lttri 11080 ax-pre-lttrn 11081 ax-pre-ltadd 11082 ax-pre-mulgt0 11083 ax-addf 11085 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-tp 4578 df-op 4580 df-uni 4857 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 df-2nd 7922 df-tpos 8156 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-sub 11346 df-neg 11347 df-div 11775 df-nn 12126 df-2 12188 df-3 12189 df-4 12190 df-5 12191 df-6 12192 df-7 12193 df-8 12194 df-9 12195 df-n0 12382 df-z 12469 df-dec 12589 df-uz 12733 df-q 12847 df-fz 13408 df-struct 17058 df-sets 17075 df-slot 17093 df-ndx 17105 df-base 17121 df-ress 17142 df-plusg 17174 df-mulr 17175 df-starv 17176 df-tset 17180 df-ple 17181 df-ds 17183 df-unif 17184 df-0g 17345 df-mgm 18548 df-sgrp 18627 df-mnd 18643 df-grp 18849 df-minusg 18850 df-subg 19036 df-cmn 19694 df-abl 19695 df-mgp 20059 df-rng 20071 df-ur 20100 df-ring 20153 df-cring 20154 df-oppr 20255 df-dvdsr 20275 df-unit 20276 df-invr 20306 df-dvr 20319 df-subrng 20461 df-subrg 20485 df-drng 20646 df-cnfld 21292 |
| This theorem is referenced by: ostthlem1 27565 |
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