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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 18980 and not on injsubmefmnd 19073 and sursubmefmnd 19072. (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 19065 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝑀 ∈ Mnd) |
| 3 | symgsubmefmndALT.g | . . . 4 ⊢ 𝐺 = (SymGrp‘𝐴) | |
| 4 | symgsubmefmndALT.b | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
| 5 | 3, 4, 1 | symgressbas 19576 | . . 3 ⊢ 𝐺 = (𝑀 ↾s 𝐵) |
| 6 | 3 | symggrp 19594 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Grp) |
| 7 | grpmnd 19131 | . . . 4 ⊢ (𝐺 ∈ Grp → 𝐺 ∈ Mnd) | |
| 8 | 6, 7 | syl 18 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Mnd) |
| 9 | 5, 8 | eqeltrrid 2866 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝑀 ↾s 𝐵) ∈ Mnd) |
| 10 | 3 | idresperm 19580 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) ∈ (Base‘𝐺)) |
| 11 | 1 | efmndid 19064 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) = (0g‘𝑀)) |
| 12 | 4 | eqcomi 2770 | . . . . 5 ⊢ (Base‘𝐺) = 𝐵 |
| 13 | 12 | a1i 11 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → (Base‘𝐺) = 𝐵) |
| 14 | 10, 11, 13 | 3eltr3d 2875 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (0g‘𝑀) ∈ 𝐵) |
| 15 | 3, 4 | symgbasmap 19571 | . . . . 5 ⊢ (𝑓 ∈ 𝐵 → 𝑓 ∈ (𝐴 ↑m 𝐴)) |
| 16 | 15 | ssriv 3935 | . . . 4 ⊢ 𝐵 ⊆ (𝐴 ↑m 𝐴) |
| 17 | eqid 2761 | . . . . 5 ⊢ (Base‘𝑀) = (Base‘𝑀) | |
| 18 | 1, 17 | efmndbas 19047 | . . . 4 ⊢ (Base‘𝑀) = (𝐴 ↑m 𝐴) |
| 19 | 16, 18 | sseqtrri 3980 | . . 3 ⊢ 𝐵 ⊆ (Base‘𝑀) |
| 20 | 14, 19 | jctil 529 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐵 ⊆ (Base‘𝑀) ∧ (0g‘𝑀) ∈ 𝐵)) |
| 21 | eqid 2761 | . . 3 ⊢ (0g‘𝑀) = (0g‘𝑀) | |
| 22 | 17, 21 | issubmndb 18980 | . 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 2145 ⊆ wss 3899 I cid 5545 ↾ cres 5653 ‘cfv 6531 (class class class)co 7412 ↑m cmap 8831 Basecbs 17367 ↾s cress 17388 0gc0g 17590 Mndcmnd 18903 SubMndcsubmnd 18957 EndoFMndcefmnd 19044 Grpcgrp 19124 SymGrpcsymg 19563 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-er 8701 df-map 8833 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-nn 12317 df-2 12386 df-3 12387 df-4 12388 df-5 12389 df-6 12390 df-7 12391 df-8 12392 df-9 12393 df-n0 12588 df-z 12675 df-uz 12947 df-fz 13621 df-struct 17305 df-sets 17322 df-slot 17340 df-ndx 17352 df-base 17368 df-ress 17389 df-plusg 17421 df-tset 17427 df-0g 17592 df-mgm 18796 df-sgrp 18888 df-mnd 18904 df-submnd 18959 df-efmnd 19045 df-grp 19127 df-symg 19564 |
| This theorem is used by: (None) |
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