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| Mirrors > Home > MPE Home > Th. List > idrespermg | Structured version Visualization version GIF version | ||
| Description: The structure with the singleton containing only the identity function restricted to a set as base set and the function composition as group operation (constructed by (structure) restricting the symmetric group to that singleton) is a permutation group (group consisting of permutations). (Contributed by AV, 17-Mar-2019.) |
| Ref | Expression |
|---|---|
| idressubgsymg.g | ⊢ 𝐺 = (SymGrp‘𝐴) |
| idrespermg.e | ⊢ 𝐸 = (𝐺 ↾s {( I ↾ 𝐴)}) |
| Ref | Expression |
|---|---|
| idrespermg | ⊢ (𝐴 ∈ 𝑉 → (𝐸 ∈ Grp ∧ (Base‘𝐸) ⊆ (Base‘𝐺))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | idressubgsymg.g | . . 3 ⊢ 𝐺 = (SymGrp‘𝐴) | |
| 2 | 1 | idressubgsymg 19625 | . 2 ⊢ (𝐴 ∈ 𝑉 → {( I ↾ 𝐴)} ∈ (SubGrp‘𝐺)) |
| 3 | eqid 2760 | . . . 4 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 4 | 1, 3 | pgrpsubgsymgbi 19623 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ({( I ↾ 𝐴)} ∈ (SubGrp‘𝐺) ↔ ({( I ↾ 𝐴)} ⊆ (Base‘𝐺) ∧ (𝐺 ↾s {( I ↾ 𝐴)}) ∈ Grp))) |
| 5 | snex 5396 | . . . . . . 7 ⊢ {( I ↾ 𝐴)} ∈ V | |
| 6 | idrespermg.e | . . . . . . . 8 ⊢ 𝐸 = (𝐺 ↾s {( I ↾ 𝐴)}) | |
| 7 | 6, 3 | ressbas 17415 | . . . . . . 7 ⊢ ({( I ↾ 𝐴)} ∈ V → ({( I ↾ 𝐴)} ∩ (Base‘𝐺)) = (Base‘𝐸)) |
| 8 | 5, 7 | mp1i 14 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → ({( I ↾ 𝐴)} ∩ (Base‘𝐺)) = (Base‘𝐸)) |
| 9 | inss2 4134 | . . . . . 6 ⊢ ({( I ↾ 𝐴)} ∩ (Base‘𝐺)) ⊆ (Base‘𝐺) | |
| 10 | 8, 9 | eqsstrrdi 3953 | . . . . 5 ⊢ (𝐴 ∈ 𝑉 → (Base‘𝐸) ⊆ (Base‘𝐺)) |
| 11 | 6 | eqcomi 2769 | . . . . . . 7 ⊢ (𝐺 ↾s {( I ↾ 𝐴)}) = 𝐸 |
| 12 | 11 | eleq1i 2851 | . . . . . 6 ⊢ ((𝐺 ↾s {( I ↾ 𝐴)}) ∈ Grp ↔ 𝐸 ∈ Grp) |
| 13 | 12 | bilani 510 | . . . . 5 ⊢ (({( I ↾ 𝐴)} ⊆ (Base‘𝐺) ∧ (𝐺 ↾s {( I ↾ 𝐴)}) ∈ Grp) → 𝐸 ∈ Grp) |
| 14 | 10, 13 | anim12ci 626 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ({( I ↾ 𝐴)} ⊆ (Base‘𝐺) ∧ (𝐺 ↾s {( I ↾ 𝐴)}) ∈ Grp)) → (𝐸 ∈ Grp ∧ (Base‘𝐸) ⊆ (Base‘𝐺))) |
| 15 | 14 | ex 418 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (({( I ↾ 𝐴)} ⊆ (Base‘𝐺) ∧ (𝐺 ↾s {( I ↾ 𝐴)}) ∈ Grp) → (𝐸 ∈ Grp ∧ (Base‘𝐸) ⊆ (Base‘𝐺)))) |
| 16 | 4, 15 | sylbid 243 | . 2 ⊢ (𝐴 ∈ 𝑉 → ({( I ↾ 𝐴)} ∈ (SubGrp‘𝐺) → (𝐸 ∈ Grp ∧ (Base‘𝐸) ⊆ (Base‘𝐺)))) |
| 17 | 2, 16 | mpd 16 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐸 ∈ Grp ∧ (Base‘𝐸) ⊆ (Base‘𝐺))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 Vcvv 3450 ⊆ wss 3895 ∩ cin 4089 {csn 4583 I cid 5544 ↾ cres 5652 ‘cfv 6538 (class class class)co 7420 Basecbs 17388 ↾s cress 17409 Grpcgrp 19145 SubGrpcsubg 19331 SymGrpcsymg 19584 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-tp 4588 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-er 8718 df-map 8850 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-nn 12337 df-2 12406 df-3 12407 df-4 12408 df-5 12409 df-6 12410 df-7 12411 df-8 12412 df-9 12413 df-n0 12608 df-z 12695 df-uz 12967 df-fz 13641 df-struct 17326 df-sets 17343 df-slot 17361 df-ndx 17373 df-base 17389 df-ress 17410 df-plusg 17442 df-tset 17448 df-0g 17613 df-mgm 18817 df-sgrp 18909 df-mnd 18925 df-submnd 18980 df-efmnd 19066 df-grp 19148 df-minusg 19149 df-subg 19334 df-symg 19585 |
| This theorem is used by: (None) |
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