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Mirrors > Home > MPE Home > Th. List > rzgrp | Structured version Visualization version GIF version |
Description: The quotient group ℝ / ℤ is a group. (Contributed by Thierry Arnoux, 26-Jan-2020.) |
Ref | Expression |
---|---|
rzgrp.r | ⊢ 𝑅 = (ℝfld /s (ℝfld ~QG ℤ)) |
Ref | Expression |
---|---|
rzgrp | ⊢ 𝑅 ∈ Grp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zsubrg 20563 | . . . . 5 ⊢ ℤ ∈ (SubRing‘ℂfld) | |
2 | zssre 12256 | . . . . 5 ⊢ ℤ ⊆ ℝ | |
3 | resubdrg 20725 | . . . . . . 7 ⊢ (ℝ ∈ (SubRing‘ℂfld) ∧ ℝfld ∈ DivRing) | |
4 | 3 | simpli 483 | . . . . . 6 ⊢ ℝ ∈ (SubRing‘ℂfld) |
5 | df-refld 20722 | . . . . . . 7 ⊢ ℝfld = (ℂfld ↾s ℝ) | |
6 | 5 | subsubrg 19965 | . . . . . 6 ⊢ (ℝ ∈ (SubRing‘ℂfld) → (ℤ ∈ (SubRing‘ℝfld) ↔ (ℤ ∈ (SubRing‘ℂfld) ∧ ℤ ⊆ ℝ))) |
7 | 4, 6 | ax-mp 5 | . . . . 5 ⊢ (ℤ ∈ (SubRing‘ℝfld) ↔ (ℤ ∈ (SubRing‘ℂfld) ∧ ℤ ⊆ ℝ)) |
8 | 1, 2, 7 | mpbir2an 707 | . . . 4 ⊢ ℤ ∈ (SubRing‘ℝfld) |
9 | subrgsubg 19945 | . . . 4 ⊢ (ℤ ∈ (SubRing‘ℝfld) → ℤ ∈ (SubGrp‘ℝfld)) | |
10 | 8, 9 | ax-mp 5 | . . 3 ⊢ ℤ ∈ (SubGrp‘ℝfld) |
11 | simpl 482 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑥 ∈ ℝ) | |
12 | 11 | recnd 10934 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑥 ∈ ℂ) |
13 | simpr 484 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℝ) | |
14 | 13 | recnd 10934 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ) |
15 | 12, 14 | addcomd 11107 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 + 𝑦) = (𝑦 + 𝑥)) |
16 | 15 | eleq1d 2823 | . . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((𝑥 + 𝑦) ∈ ℤ ↔ (𝑦 + 𝑥) ∈ ℤ)) |
17 | 16 | rgen2 3126 | . . 3 ⊢ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ ((𝑥 + 𝑦) ∈ ℤ ↔ (𝑦 + 𝑥) ∈ ℤ) |
18 | rebase 20723 | . . . 4 ⊢ ℝ = (Base‘ℝfld) | |
19 | replusg 20727 | . . . 4 ⊢ + = (+g‘ℝfld) | |
20 | 18, 19 | isnsg 18698 | . . 3 ⊢ (ℤ ∈ (NrmSGrp‘ℝfld) ↔ (ℤ ∈ (SubGrp‘ℝfld) ∧ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ ((𝑥 + 𝑦) ∈ ℤ ↔ (𝑦 + 𝑥) ∈ ℤ))) |
21 | 10, 17, 20 | mpbir2an 707 | . 2 ⊢ ℤ ∈ (NrmSGrp‘ℝfld) |
22 | rzgrp.r | . . 3 ⊢ 𝑅 = (ℝfld /s (ℝfld ~QG ℤ)) | |
23 | 22 | qusgrp 18726 | . 2 ⊢ (ℤ ∈ (NrmSGrp‘ℝfld) → 𝑅 ∈ Grp) |
24 | 21, 23 | ax-mp 5 | 1 ⊢ 𝑅 ∈ Grp |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ∀wral 3063 ⊆ wss 3883 ‘cfv 6418 (class class class)co 7255 ℝcr 10801 + caddc 10805 ℤcz 12249 /s cqus 17133 Grpcgrp 18492 SubGrpcsubg 18664 NrmSGrpcnsg 18665 ~QG cqg 18666 DivRingcdr 19906 SubRingcsubrg 19935 ℂfldccnfld 20510 ℝfldcrefld 20721 |
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-ec 8458 df-qs 8462 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-inf 9132 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-sca 16904 df-vsca 16905 df-ip 16906 df-tset 16907 df-ple 16908 df-ds 16910 df-unif 16911 df-0g 17069 df-imas 17136 df-qus 17137 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-grp 18495 df-minusg 18496 df-subg 18667 df-nsg 18668 df-eqg 18669 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-subrg 19937 df-cnfld 20511 df-refld 20722 |
This theorem is referenced by: (None) |
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