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Mirrors > Home > MPE Home > Th. List > symggrp | Structured version Visualization version GIF version |
Description: The symmetric group on a set 𝐴 is a group. (Contributed by Paul Chapman, 25-Feb-2008.) (Revised by Mario Carneiro, 13-Jan-2015.) (Proof shortened by AV, 28-Jan-2024.) |
Ref | Expression |
---|---|
symggrp.1 | ⊢ 𝐺 = (SymGrp‘𝐴) |
Ref | Expression |
---|---|
symggrp | ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Grp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2739 | . 2 ⊢ (𝐴 ∈ 𝑉 → (Base‘𝐺) = (Base‘𝐺)) | |
2 | eqidd 2739 | . 2 ⊢ (𝐴 ∈ 𝑉 → (+g‘𝐺) = (+g‘𝐺)) | |
3 | symggrp.1 | . . . 4 ⊢ 𝐺 = (SymGrp‘𝐴) | |
4 | eqid 2738 | . . . 4 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
5 | eqid 2738 | . . . 4 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
6 | 3, 4, 5 | symgcl 18907 | . . 3 ⊢ ((𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺)) → (𝑥(+g‘𝐺)𝑦) ∈ (Base‘𝐺)) |
7 | 6 | 3adant1 1128 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺)) → (𝑥(+g‘𝐺)𝑦) ∈ (Base‘𝐺)) |
8 | 3, 4, 5 | symgcl 18907 | . . . 4 ⊢ ((𝑓 ∈ (Base‘𝐺) ∧ 𝑔 ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)𝑔) ∈ (Base‘𝐺)) |
9 | 3, 4, 5 | symgov 18906 | . . . 4 ⊢ ((𝑓 ∈ (Base‘𝐺) ∧ 𝑔 ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)𝑔) = (𝑓 ∘ 𝑔)) |
10 | 8, 9 | symggrplem 18438 | . . 3 ⊢ ((𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺) ∧ 𝑧 ∈ (Base‘𝐺)) → ((𝑥(+g‘𝐺)𝑦)(+g‘𝐺)𝑧) = (𝑥(+g‘𝐺)(𝑦(+g‘𝐺)𝑧))) |
11 | 10 | adantl 481 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ (𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺) ∧ 𝑧 ∈ (Base‘𝐺))) → ((𝑥(+g‘𝐺)𝑦)(+g‘𝐺)𝑧) = (𝑥(+g‘𝐺)(𝑦(+g‘𝐺)𝑧))) |
12 | 3 | idresperm 18908 | . 2 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) ∈ (Base‘𝐺)) |
13 | 3, 4, 5 | symgov 18906 | . . . 4 ⊢ ((( I ↾ 𝐴) ∈ (Base‘𝐺) ∧ 𝑥 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑥) = (( I ↾ 𝐴) ∘ 𝑥)) |
14 | 12, 13 | sylan 579 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑥) = (( I ↾ 𝐴) ∘ 𝑥)) |
15 | 3, 4 | elsymgbas 18896 | . . . . 5 ⊢ (𝐴 ∈ 𝑉 → (𝑥 ∈ (Base‘𝐺) ↔ 𝑥:𝐴–1-1-onto→𝐴)) |
16 | 15 | biimpa 476 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → 𝑥:𝐴–1-1-onto→𝐴) |
17 | f1of 6700 | . . . 4 ⊢ (𝑥:𝐴–1-1-onto→𝐴 → 𝑥:𝐴⟶𝐴) | |
18 | fcoi2 6633 | . . . 4 ⊢ (𝑥:𝐴⟶𝐴 → (( I ↾ 𝐴) ∘ 𝑥) = 𝑥) | |
19 | 16, 17, 18 | 3syl 18 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → (( I ↾ 𝐴) ∘ 𝑥) = 𝑥) |
20 | 14, 19 | eqtrd 2778 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑥) = 𝑥) |
21 | f1ocnv 6712 | . . . . 5 ⊢ (𝑥:𝐴–1-1-onto→𝐴 → ◡𝑥:𝐴–1-1-onto→𝐴) | |
22 | 21 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (𝑥:𝐴–1-1-onto→𝐴 → ◡𝑥:𝐴–1-1-onto→𝐴)) |
23 | 3, 4 | elsymgbas 18896 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (◡𝑥 ∈ (Base‘𝐺) ↔ ◡𝑥:𝐴–1-1-onto→𝐴)) |
24 | 22, 15, 23 | 3imtr4d 293 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (𝑥 ∈ (Base‘𝐺) → ◡𝑥 ∈ (Base‘𝐺))) |
25 | 24 | imp 406 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → ◡𝑥 ∈ (Base‘𝐺)) |
26 | 3, 4, 5 | symgov 18906 | . . . 4 ⊢ ((◡𝑥 ∈ (Base‘𝐺) ∧ 𝑥 ∈ (Base‘𝐺)) → (◡𝑥(+g‘𝐺)𝑥) = (◡𝑥 ∘ 𝑥)) |
27 | 25, 26 | sylancom 587 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → (◡𝑥(+g‘𝐺)𝑥) = (◡𝑥 ∘ 𝑥)) |
28 | f1ococnv1 6728 | . . . 4 ⊢ (𝑥:𝐴–1-1-onto→𝐴 → (◡𝑥 ∘ 𝑥) = ( I ↾ 𝐴)) | |
29 | 16, 28 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → (◡𝑥 ∘ 𝑥) = ( I ↾ 𝐴)) |
30 | 27, 29 | eqtrd 2778 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑥 ∈ (Base‘𝐺)) → (◡𝑥(+g‘𝐺)𝑥) = ( I ↾ 𝐴)) |
31 | 1, 2, 7, 11, 12, 20, 25, 30 | isgrpd 18516 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Grp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 I cid 5479 ◡ccnv 5579 ↾ cres 5582 ∘ ccom 5584 ⟶wf 6414 –1-1-onto→wf1o 6417 ‘cfv 6418 (class class class)co 7255 Basecbs 16840 +gcplusg 16888 Grpcgrp 18492 SymGrpcsymg 18889 |
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 |
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-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 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-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-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-tset 16907 df-0g 17069 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-efmnd 18423 df-grp 18495 df-symg 18890 |
This theorem is referenced by: symginv 18925 symgsubmefmndALT 18926 galactghm 18927 symgga 18930 pgrpsubgsymgbi 18931 pgrpsubgsymg 18932 idressubgsymg 18933 gsumccatsymgsn 18949 symgsssg 18990 symgfisg 18991 symggen 18993 symgtrinv 18995 psgnunilem5 19017 psgnunilem2 19018 psgnuni 19022 psgneldm2 19027 psgnfitr 19040 psgnghm 20697 zrhpsgninv 20702 evpmodpmf1o 20713 mdetleib2 21645 mdetdiag 21656 mdetralt 21665 mdetunilem7 21675 symgtgp 23165 symgfcoeu 31253 symgsubg 31258 cyc3co2 31309 cyc3genpmlem 31320 cyc3genpm 31321 cycpmconjs 31325 cyc3conja 31326 madjusmdetlem3 31681 madjusmdetlem4 31682 pgrple2abl 45589 |
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