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| Mirrors > Home > MPE Home > Th. List > symgsubmefmndALT | Structured version Visualization version GIF version | ||
| Description: The symmetric group on a set 𝐴 is a submonoid of the monoid of endofunctions on 𝐴. Alternate proof based on issubmndb 18894 and not on injsubmefmnd 18987 and sursubmefmnd 18986. (Contributed by AV, 18-Feb-2024.) (Revised by AV, 30-Mar-2024.) (New usage is discouraged.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| symgsubmefmndALT.m | ⊢ 𝑀 = (EndoFMnd‘𝐴) |
| symgsubmefmndALT.g | ⊢ 𝐺 = (SymGrp‘𝐴) |
| symgsubmefmndALT.b | ⊢ 𝐵 = (Base‘𝐺) |
| Ref | Expression |
|---|---|
| symgsubmefmndALT | ⊢ (𝐴 ∈ 𝑉 → 𝐵 ∈ (SubMnd‘𝑀)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | symgsubmefmndALT.m | . . 3 ⊢ 𝑀 = (EndoFMnd‘𝐴) | |
| 2 | 1 | efmndmnd 18979 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝑀 ∈ Mnd) |
| 3 | symgsubmefmndALT.g | . . . 4 ⊢ 𝐺 = (SymGrp‘𝐴) | |
| 4 | symgsubmefmndALT.b | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
| 5 | 3, 4, 1 | symgressbas 19483 | . . 3 ⊢ 𝐺 = (𝑀 ↾s 𝐵) |
| 6 | 3 | symggrp 19501 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Grp) |
| 7 | grpmnd 19038 | . . . 4 ⊢ (𝐺 ∈ Grp → 𝐺 ∈ Mnd) | |
| 8 | 6, 7 | syl 18 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Mnd) |
| 9 | 5, 8 | eqeltrrid 2871 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝑀 ↾s 𝐵) ∈ Mnd) |
| 10 | 3 | idresperm 19487 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) ∈ (Base‘𝐺)) |
| 11 | 1 | efmndid 18978 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) = (0g‘𝑀)) |
| 12 | 4 | eqcomi 2775 | . . . . 5 ⊢ (Base‘𝐺) = 𝐵 |
| 13 | 12 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (Base‘𝐺) = 𝐵) |
| 14 | 10, 11, 13 | 3eltr3d 2880 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (0g‘𝑀) ∈ 𝐵) |
| 15 | 3, 4 | symgbasmap 19478 | . . . . 5 ⊢ (𝑓 ∈ 𝐵 → 𝑓 ∈ (𝐴 ↑m 𝐴)) |
| 16 | 15 | ssriv 3944 | . . . 4 ⊢ 𝐵 ⊆ (𝐴 ↑m 𝐴) |
| 17 | eqid 2766 | . . . . 5 ⊢ (Base‘𝑀) = (Base‘𝑀) | |
| 18 | 1, 17 | efmndbas 18961 | . . . 4 ⊢ (Base‘𝑀) = (𝐴 ↑m 𝐴) |
| 19 | 16, 18 | sseqtrri 3989 | . . 3 ⊢ 𝐵 ⊆ (Base‘𝑀) |
| 20 | 14, 19 | jctil 529 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐵 ⊆ (Base‘𝑀) ∧ (0g‘𝑀) ∈ 𝐵)) |
| 21 | eqid 2766 | . . 3 ⊢ (0g‘𝑀) = (0g‘𝑀) | |
| 22 | 17, 21 | issubmndb 18894 | . 2 ⊢ (𝐵 ∈ (SubMnd‘𝑀) ↔ ((𝑀 ∈ Mnd ∧ (𝑀 ↾s 𝐵) ∈ Mnd) ∧ (𝐵 ⊆ (Base‘𝑀) ∧ (0g‘𝑀) ∈ 𝐵))) |
| 23 | 2, 9, 20, 22 | syl21anbrc 1363 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐵 ∈ (SubMnd‘𝑀)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ⊆ wss 3908 I cid 5560 ↾ cres 5668 ‘cfv 6543 (class class class)co 7423 ↑m cmap 8833 Basecbs 17294 ↾s cress 17315 0gc0g 17517 Mndcmnd 18821 SubMndcsubmnd 18871 EndoFMndcefmnd 18958 Grpcgrp 19031 SymGrpcsymg 19470 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-1st 7995 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8703 df-map 8835 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-nn 12252 df-2 12321 df-3 12322 df-4 12323 df-5 12324 df-6 12325 df-7 12326 df-8 12327 df-9 12328 df-n0 12523 df-z 12610 df-uz 12881 df-fz 13554 df-struct 17232 df-sets 17249 df-slot 17267 df-ndx 17279 df-base 17295 df-ress 17316 df-plusg 17348 df-tset 17354 df-0g 17519 df-mgm 18723 df-sgrp 18806 df-mnd 18822 df-submnd 18873 df-efmnd 18959 df-grp 19034 df-symg 19471 |
| This theorem is used by: (None) |
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