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| Mirrors > Home > MPE Home > Th. List > ghmqusnsglem2 | Structured version Visualization version GIF version | ||
| Description: Lemma for ghmqusnsg 19496. (Contributed by Thierry Arnoux, 13-May-2025.) |
| Ref | Expression |
|---|---|
| ghmqusnsg.0 | ⊢ 0 = (0g‘𝐻) |
| ghmqusnsg.f | ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) |
| ghmqusnsg.k | ⊢ 𝐾 = (◡𝐹 “ { 0 }) |
| ghmqusnsg.q | ⊢ 𝑄 = (𝐺 /s (𝐺 ~QG 𝑁)) |
| ghmqusnsg.j | ⊢ 𝐽 = (𝑞 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑞)) |
| ghmqusnsg.n | ⊢ (𝜑 → 𝑁 ⊆ 𝐾) |
| ghmqusnsg.1 | ⊢ (𝜑 → 𝑁 ∈ (NrmSGrp‘𝐺)) |
| ghmqusnsglem2.y | ⊢ (𝜑 → 𝑌 ∈ (Base‘𝑄)) |
| Ref | Expression |
|---|---|
| ghmqusnsglem2 | ⊢ (𝜑 → ∃𝑥 ∈ 𝑌 (𝐽‘𝑌) = (𝐹‘𝑥)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ghmqusnsglem2.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ (Base‘𝑄)) | |
| 2 | ghmqusnsg.q | . . . . . 6 ⊢ 𝑄 = (𝐺 /s (𝐺 ~QG 𝑁)) | |
| 3 | 2 | a1i 11 | . . . . 5 ⊢ (𝜑 → 𝑄 = (𝐺 /s (𝐺 ~QG 𝑁))) |
| 4 | eqidd 2761 | . . . . 5 ⊢ (𝜑 → (Base‘𝐺) = (Base‘𝐺)) | |
| 5 | ovexd 7455 | . . . . 5 ⊢ (𝜑 → (𝐺 ~QG 𝑁) ∈ V) | |
| 6 | ghmqusnsg.f | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) | |
| 7 | ghmgrp1 19432 | . . . . . 6 ⊢ (𝐹 ∈ (𝐺 GrpHom 𝐻) → 𝐺 ∈ Grp) | |
| 8 | 6, 7 | syl 18 | . . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 9 | 3, 4, 5, 8 | qusbas 17717 | . . . 4 ⊢ (𝜑 → ((Base‘𝐺) / (𝐺 ~QG 𝑁)) = (Base‘𝑄)) |
| 10 | 1, 9 | eleqtrrd 2863 | . . 3 ⊢ (𝜑 → 𝑌 ∈ ((Base‘𝐺) / (𝐺 ~QG 𝑁))) |
| 11 | elqsg 8784 | . . . 4 ⊢ (𝑌 ∈ (Base‘𝑄) → (𝑌 ∈ ((Base‘𝐺) / (𝐺 ~QG 𝑁)) ↔ ∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁))) | |
| 12 | 11 | biimpa 482 | . . 3 ⊢ ((𝑌 ∈ (Base‘𝑄) ∧ 𝑌 ∈ ((Base‘𝐺) / (𝐺 ~QG 𝑁))) → ∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁)) |
| 13 | 1, 10, 12 | syl2anc 596 | . 2 ⊢ (𝜑 → ∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁)) |
| 14 | ghmqusnsg.1 | . . . . . . . . 9 ⊢ (𝜑 → 𝑁 ∈ (NrmSGrp‘𝐺)) | |
| 15 | nsgsubg 19368 | . . . . . . . . 9 ⊢ (𝑁 ∈ (NrmSGrp‘𝐺) → 𝑁 ∈ (SubGrp‘𝐺)) | |
| 16 | eqid 2760 | . . . . . . . . . 10 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 17 | eqid 2760 | . . . . . . . . . 10 ⊢ (𝐺 ~QG 𝑁) = (𝐺 ~QG 𝑁) | |
| 18 | 16, 17 | eqger 19390 | . . . . . . . . 9 ⊢ (𝑁 ∈ (SubGrp‘𝐺) → (𝐺 ~QG 𝑁) Er (Base‘𝐺)) |
| 19 | 14, 15, 18 | 3syl 19 | . . . . . . . 8 ⊢ (𝜑 → (𝐺 ~QG 𝑁) Er (Base‘𝐺)) |
| 20 | 19 | ad2antrr 739 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐺 ~QG 𝑁) Er (Base‘𝐺)) |
| 21 | simplr 781 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑥 ∈ (Base‘𝐺)) | |
| 22 | ecref 8763 | . . . . . . 7 ⊢ (((𝐺 ~QG 𝑁) Er (Base‘𝐺) ∧ 𝑥 ∈ (Base‘𝐺)) → 𝑥 ∈ [𝑥](𝐺 ~QG 𝑁)) | |
| 23 | 20, 21, 22 | syl2anc 596 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑥 ∈ [𝑥](𝐺 ~QG 𝑁)) |
| 24 | simpr 490 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑌 = [𝑥](𝐺 ~QG 𝑁)) | |
| 25 | 23, 24 | eleqtrrd 2863 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑥 ∈ 𝑌) |
| 26 | 24 | fveq2d 6889 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐽‘𝑌) = (𝐽‘[𝑥](𝐺 ~QG 𝑁))) |
| 27 | ghmqusnsg.0 | . . . . . . 7 ⊢ 0 = (0g‘𝐻) | |
| 28 | 6 | ad2antrr 739 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝐹 ∈ (𝐺 GrpHom 𝐻)) |
| 29 | ghmqusnsg.k | . . . . . . 7 ⊢ 𝐾 = (◡𝐹 “ { 0 }) | |
| 30 | ghmqusnsg.j | . . . . . . 7 ⊢ 𝐽 = (𝑞 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑞)) | |
| 31 | ghmqusnsg.n | . . . . . . . 8 ⊢ (𝜑 → 𝑁 ⊆ 𝐾) | |
| 32 | 31 | ad2antrr 739 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑁 ⊆ 𝐾) |
| 33 | 14 | ad2antrr 739 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑁 ∈ (NrmSGrp‘𝐺)) |
| 34 | 27, 28, 29, 2, 30, 32, 33, 21 | ghmqusnsglem1 19494 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐽‘[𝑥](𝐺 ~QG 𝑁)) = (𝐹‘𝑥)) |
| 35 | 26, 34 | eqtrd 2795 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐽‘𝑌) = (𝐹‘𝑥)) |
| 36 | 25, 35 | jca 521 | . . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝑥 ∈ 𝑌 ∧ (𝐽‘𝑌) = (𝐹‘𝑥))) |
| 37 | 36 | expl 463 | . . 3 ⊢ (𝜑 → ((𝑥 ∈ (Base‘𝐺) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝑥 ∈ 𝑌 ∧ (𝐽‘𝑌) = (𝐹‘𝑥)))) |
| 38 | 37 | reximdv2 3172 | . 2 ⊢ (𝜑 → (∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁) → ∃𝑥 ∈ 𝑌 (𝐽‘𝑌) = (𝐹‘𝑥))) |
| 39 | 13, 38 | mpd 16 | 1 ⊢ (𝜑 → ∃𝑥 ∈ 𝑌 (𝐽‘𝑌) = (𝐹‘𝑥)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ∃wrex 3086 Vcvv 3450 ⊆ wss 3895 {csn 4583 ∪ cuni 4866 ↦ cmpt 5185 ◡ccnv 5649 “ cima 5653 ‘cfv 6538 (class class class)co 7420 Er wer 8714 [cec 8715 / cqs 8716 Basecbs 17387 0gc0g 17610 /s cqus 17677 Grpcgrp 19144 SubGrpcsubg 19330 NrmSGrpcnsg 19331 ~QG cqg 19332 GrpHom cghm 19427 |
| 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 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| 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 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-er 8717 df-ec 8719 df-qs 8723 df-map 8849 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-sup 9434 df-inf 9435 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-3 12406 df-4 12407 df-5 12408 df-6 12409 df-7 12410 df-8 12411 df-9 12412 df-n0 12607 df-z 12694 df-dec 12815 df-uz 12966 df-fz 13640 df-struct 17325 df-sets 17342 df-slot 17360 df-ndx 17372 df-base 17388 df-ress 17409 df-plusg 17441 df-mulr 17442 df-sca 17444 df-vsca 17445 df-ip 17446 df-tset 17447 df-ple 17448 df-ds 17450 df-0g 17612 df-imas 17680 df-qus 17681 df-mgm 18816 df-sgrp 18908 df-mnd 18924 df-grp 19147 df-minusg 19148 df-subg 19333 df-nsg 19334 df-eqg 19335 df-ghm 19428 |
| This theorem is used by: ghmqusnsg 19496 rhmqusnsg 21581 |
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