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Theorem quslsm 31495
Description: Express the image by the quotient map in terms of direct sum. (Contributed by Thierry Arnoux, 27-Jul-2024.)
Hypotheses
Ref Expression
quslsm.b 𝐵 = (Base‘𝐺)
quslsm.p = (LSSum‘𝐺)
quslsm.n (𝜑𝑆 ∈ (SubGrp‘𝐺))
quslsm.s (𝜑𝑋𝐵)
Assertion
Ref Expression
quslsm (𝜑 → [𝑋](𝐺 ~QG 𝑆) = ({𝑋} 𝑆))

Proof of Theorem quslsm
Dummy variables 𝑖 𝑗 𝑘 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 quslsm.n . . . . . 6 (𝜑𝑆 ∈ (SubGrp‘𝐺))
2 subgrcl 18675 . . . . . 6 (𝑆 ∈ (SubGrp‘𝐺) → 𝐺 ∈ Grp)
31, 2syl 17 . . . . 5 (𝜑𝐺 ∈ Grp)
4 quslsm.b . . . . . . 7 𝐵 = (Base‘𝐺)
54subgss 18671 . . . . . 6 (𝑆 ∈ (SubGrp‘𝐺) → 𝑆𝐵)
61, 5syl 17 . . . . 5 (𝜑𝑆𝐵)
7 eqid 2738 . . . . . 6 (invg𝐺) = (invg𝐺)
8 eqid 2738 . . . . . 6 (+g𝐺) = (+g𝐺)
9 eqid 2738 . . . . . 6 (𝐺 ~QG 𝑆) = (𝐺 ~QG 𝑆)
104, 7, 8, 9eqgfval 18719 . . . . 5 ((𝐺 ∈ Grp ∧ 𝑆𝐵) → (𝐺 ~QG 𝑆) = {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆)})
113, 6, 10syl2anc 583 . . . 4 (𝜑 → (𝐺 ~QG 𝑆) = {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆)})
12 simpr 484 . . . . . . . 8 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆) → (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆)
13 oveq2 7263 . . . . . . . . . 10 (𝑘 = (((invg𝐺)‘𝑖)(+g𝐺)𝑗) → (𝑖(+g𝐺)𝑘) = (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)))
1413eqeq1d 2740 . . . . . . . . 9 (𝑘 = (((invg𝐺)‘𝑖)(+g𝐺)𝑗) → ((𝑖(+g𝐺)𝑘) = 𝑗 ↔ (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)) = 𝑗))
1514adantl 481 . . . . . . . 8 ((((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆) ∧ 𝑘 = (((invg𝐺)‘𝑖)(+g𝐺)𝑗)) → ((𝑖(+g𝐺)𝑘) = 𝑗 ↔ (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)) = 𝑗))
163adantr 480 . . . . . . . . . . . 12 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → 𝐺 ∈ Grp)
17 vex 3426 . . . . . . . . . . . . . . . 16 𝑖 ∈ V
18 vex 3426 . . . . . . . . . . . . . . . 16 𝑗 ∈ V
1917, 18prss 4750 . . . . . . . . . . . . . . 15 ((𝑖𝐵𝑗𝐵) ↔ {𝑖, 𝑗} ⊆ 𝐵)
2019bicomi 223 . . . . . . . . . . . . . 14 ({𝑖, 𝑗} ⊆ 𝐵 ↔ (𝑖𝐵𝑗𝐵))
2120simplbi 497 . . . . . . . . . . . . 13 ({𝑖, 𝑗} ⊆ 𝐵𝑖𝐵)
2221adantl 481 . . . . . . . . . . . 12 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → 𝑖𝐵)
23 eqid 2738 . . . . . . . . . . . . 13 (0g𝐺) = (0g𝐺)
244, 8, 23, 7grprinv 18544 . . . . . . . . . . . 12 ((𝐺 ∈ Grp ∧ 𝑖𝐵) → (𝑖(+g𝐺)((invg𝐺)‘𝑖)) = (0g𝐺))
2516, 22, 24syl2anc 583 . . . . . . . . . . 11 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → (𝑖(+g𝐺)((invg𝐺)‘𝑖)) = (0g𝐺))
2625oveq1d 7270 . . . . . . . . . 10 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → ((𝑖(+g𝐺)((invg𝐺)‘𝑖))(+g𝐺)𝑗) = ((0g𝐺)(+g𝐺)𝑗))
274, 7grpinvcl 18542 . . . . . . . . . . . 12 ((𝐺 ∈ Grp ∧ 𝑖𝐵) → ((invg𝐺)‘𝑖) ∈ 𝐵)
2816, 22, 27syl2anc 583 . . . . . . . . . . 11 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → ((invg𝐺)‘𝑖) ∈ 𝐵)
2920simprbi 496 . . . . . . . . . . . 12 ({𝑖, 𝑗} ⊆ 𝐵𝑗𝐵)
3029adantl 481 . . . . . . . . . . 11 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → 𝑗𝐵)
314, 8grpass 18501 . . . . . . . . . . 11 ((𝐺 ∈ Grp ∧ (𝑖𝐵 ∧ ((invg𝐺)‘𝑖) ∈ 𝐵𝑗𝐵)) → ((𝑖(+g𝐺)((invg𝐺)‘𝑖))(+g𝐺)𝑗) = (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)))
3216, 22, 28, 30, 31syl13anc 1370 . . . . . . . . . 10 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → ((𝑖(+g𝐺)((invg𝐺)‘𝑖))(+g𝐺)𝑗) = (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)))
334, 8, 23grplid 18524 . . . . . . . . . . 11 ((𝐺 ∈ Grp ∧ 𝑗𝐵) → ((0g𝐺)(+g𝐺)𝑗) = 𝑗)
3416, 30, 33syl2anc 583 . . . . . . . . . 10 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → ((0g𝐺)(+g𝐺)𝑗) = 𝑗)
3526, 32, 343eqtr3d 2786 . . . . . . . . 9 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)) = 𝑗)
3635adantr 480 . . . . . . . 8 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆) → (𝑖(+g𝐺)(((invg𝐺)‘𝑖)(+g𝐺)𝑗)) = 𝑗)
3712, 15, 36rspcedvd 3555 . . . . . . 7 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆) → ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)
38 oveq2 7263 . . . . . . . . . . 11 ((𝑖(+g𝐺)𝑘) = 𝑗 → (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)) = (((invg𝐺)‘𝑖)(+g𝐺)𝑗))
3938adantl 481 . . . . . . . . . 10 ((((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) ∧ (𝑖(+g𝐺)𝑘) = 𝑗) → (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)) = (((invg𝐺)‘𝑖)(+g𝐺)𝑗))
40 simpll 763 . . . . . . . . . . . 12 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) → 𝜑)
4122adantr 480 . . . . . . . . . . . 12 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) → 𝑖𝐵)
426adantr 480 . . . . . . . . . . . . 13 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → 𝑆𝐵)
4342sselda 3917 . . . . . . . . . . . 12 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) → 𝑘𝐵)
4433ad2ant1 1131 . . . . . . . . . . . . . . 15 ((𝜑𝑖𝐵𝑘𝐵) → 𝐺 ∈ Grp)
45 simp2 1135 . . . . . . . . . . . . . . 15 ((𝜑𝑖𝐵𝑘𝐵) → 𝑖𝐵)
464, 8, 23, 7grplinv 18543 . . . . . . . . . . . . . . 15 ((𝐺 ∈ Grp ∧ 𝑖𝐵) → (((invg𝐺)‘𝑖)(+g𝐺)𝑖) = (0g𝐺))
4744, 45, 46syl2anc 583 . . . . . . . . . . . . . 14 ((𝜑𝑖𝐵𝑘𝐵) → (((invg𝐺)‘𝑖)(+g𝐺)𝑖) = (0g𝐺))
4847oveq1d 7270 . . . . . . . . . . . . 13 ((𝜑𝑖𝐵𝑘𝐵) → ((((invg𝐺)‘𝑖)(+g𝐺)𝑖)(+g𝐺)𝑘) = ((0g𝐺)(+g𝐺)𝑘))
4944, 45, 27syl2anc 583 . . . . . . . . . . . . . 14 ((𝜑𝑖𝐵𝑘𝐵) → ((invg𝐺)‘𝑖) ∈ 𝐵)
50 simp3 1136 . . . . . . . . . . . . . 14 ((𝜑𝑖𝐵𝑘𝐵) → 𝑘𝐵)
514, 8grpass 18501 . . . . . . . . . . . . . 14 ((𝐺 ∈ Grp ∧ (((invg𝐺)‘𝑖) ∈ 𝐵𝑖𝐵𝑘𝐵)) → ((((invg𝐺)‘𝑖)(+g𝐺)𝑖)(+g𝐺)𝑘) = (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)))
5244, 49, 45, 50, 51syl13anc 1370 . . . . . . . . . . . . 13 ((𝜑𝑖𝐵𝑘𝐵) → ((((invg𝐺)‘𝑖)(+g𝐺)𝑖)(+g𝐺)𝑘) = (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)))
534, 8, 23grplid 18524 . . . . . . . . . . . . . 14 ((𝐺 ∈ Grp ∧ 𝑘𝐵) → ((0g𝐺)(+g𝐺)𝑘) = 𝑘)
5444, 50, 53syl2anc 583 . . . . . . . . . . . . 13 ((𝜑𝑖𝐵𝑘𝐵) → ((0g𝐺)(+g𝐺)𝑘) = 𝑘)
5548, 52, 543eqtr3d 2786 . . . . . . . . . . . 12 ((𝜑𝑖𝐵𝑘𝐵) → (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)) = 𝑘)
5640, 41, 43, 55syl3anc 1369 . . . . . . . . . . 11 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) → (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)) = 𝑘)
5756adantr 480 . . . . . . . . . 10 ((((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) ∧ (𝑖(+g𝐺)𝑘) = 𝑗) → (((invg𝐺)‘𝑖)(+g𝐺)(𝑖(+g𝐺)𝑘)) = 𝑘)
5839, 57eqtr3d 2780 . . . . . . . . 9 ((((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) ∧ (𝑖(+g𝐺)𝑘) = 𝑗) → (((invg𝐺)‘𝑖)(+g𝐺)𝑗) = 𝑘)
59 simplr 765 . . . . . . . . 9 ((((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) ∧ (𝑖(+g𝐺)𝑘) = 𝑗) → 𝑘𝑆)
6058, 59eqeltrd 2839 . . . . . . . 8 ((((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ 𝑘𝑆) ∧ (𝑖(+g𝐺)𝑘) = 𝑗) → (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆)
6160r19.29an 3216 . . . . . . 7 (((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗) → (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆)
6237, 61impbida 797 . . . . . 6 ((𝜑 ∧ {𝑖, 𝑗} ⊆ 𝐵) → ((((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆 ↔ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗))
6362pm5.32da 578 . . . . 5 (𝜑 → (({𝑖, 𝑗} ⊆ 𝐵 ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆) ↔ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)))
6463opabbidv 5136 . . . 4 (𝜑 → {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ (((invg𝐺)‘𝑖)(+g𝐺)𝑗) ∈ 𝑆)} = {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)})
6511, 64eqtrd 2778 . . 3 (𝜑 → (𝐺 ~QG 𝑆) = {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)})
6665eceq2d 8498 . 2 (𝜑 → [𝑋](𝐺 ~QG 𝑆) = [𝑋]{⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)})
67 quslsm.p . . 3 = (LSSum‘𝐺)
68 eqid 2738 . . 3 {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)} = {⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)}
693grpmndd 18504 . . 3 (𝜑𝐺 ∈ Mnd)
70 quslsm.s . . 3 (𝜑𝑋𝐵)
714, 8, 67, 68, 69, 6, 70lsmsnorb2 31482 . 2 (𝜑 → ({𝑋} 𝑆) = [𝑋]{⟨𝑖, 𝑗⟩ ∣ ({𝑖, 𝑗} ⊆ 𝐵 ∧ ∃𝑘𝑆 (𝑖(+g𝐺)𝑘) = 𝑗)})
7266, 71eqtr4d 2781 1 (𝜑 → [𝑋](𝐺 ~QG 𝑆) = ({𝑋} 𝑆))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 395  w3a 1085   = wceq 1539  wcel 2108  wrex 3064  wss 3883  {csn 4558  {cpr 4560  {copab 5132  cfv 6418  (class class class)co 7255  [cec 8454  Basecbs 16840  +gcplusg 16888  0gc0g 17067  Grpcgrp 18492  invgcminusg 18493  SubGrpcsubg 18664   ~QG cqg 18666  LSSumclsm 19154
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-tpos 8013  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-er 8456  df-ec 8458  df-en 8692  df-dom 8693  df-sdom 8694  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-sets 16793  df-slot 16811  df-ndx 16823  df-base 16841  df-plusg 16901  df-0g 17069  df-mgm 18241  df-sgrp 18290  df-mnd 18301  df-grp 18495  df-minusg 18496  df-subg 18667  df-eqg 18669  df-oppg 18865  df-lsm 19156
This theorem is referenced by:  qusima  31496  nsgqus0  31497  nsgmgclem  31498  nsgqusf1olem1  31500  nsgqusf1olem2  31501  nsgqusf1olem3  31502
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