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| Mirrors > Home > MPE Home > Th. List > ghmqusnsglem2 | Structured version Visualization version GIF version | ||
| Description: Lemma for ghmqusnsg 19356. (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 2764 | . . . . 5 ⊢ (𝜑 → (Base‘𝐺) = (Base‘𝐺)) | |
| 5 | ovexd 7445 | . . . . 5 ⊢ (𝜑 → (𝐺 ~QG 𝑁) ∈ V) | |
| 6 | ghmqusnsg.f | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) | |
| 7 | ghmgrp1 19292 | . . . . . 6 ⊢ (𝐹 ∈ (𝐺 GrpHom 𝐻) → 𝐺 ∈ Grp) | |
| 8 | 6, 7 | syl 18 | . . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 9 | 3, 4, 5, 8 | qusbas 17603 | . . . 4 ⊢ (𝜑 → ((Base‘𝐺) / (𝐺 ~QG 𝑁)) = (Base‘𝑄)) |
| 10 | 1, 9 | eleqtrrd 2866 | . . 3 ⊢ (𝜑 → 𝑌 ∈ ((Base‘𝐺) / (𝐺 ~QG 𝑁))) |
| 11 | elqsg 8757 | . . . 4 ⊢ (𝑌 ∈ (Base‘𝑄) → (𝑌 ∈ ((Base‘𝐺) / (𝐺 ~QG 𝑁)) ↔ ∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁))) | |
| 12 | 11 | biimpa 481 | . . 3 ⊢ ((𝑌 ∈ (Base‘𝑄) ∧ 𝑌 ∈ ((Base‘𝐺) / (𝐺 ~QG 𝑁))) → ∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁)) |
| 13 | 1, 10, 12 | syl2anc 595 | . 2 ⊢ (𝜑 → ∃𝑥 ∈ (Base‘𝐺)𝑌 = [𝑥](𝐺 ~QG 𝑁)) |
| 14 | ghmqusnsg.1 | . . . . . . . . 9 ⊢ (𝜑 → 𝑁 ∈ (NrmSGrp‘𝐺)) | |
| 15 | nsgsubg 19228 | . . . . . . . . 9 ⊢ (𝑁 ∈ (NrmSGrp‘𝐺) → 𝑁 ∈ (SubGrp‘𝐺)) | |
| 16 | eqid 2763 | . . . . . . . . . 10 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 17 | eqid 2763 | . . . . . . . . . 10 ⊢ (𝐺 ~QG 𝑁) = (𝐺 ~QG 𝑁) | |
| 18 | 16, 17 | eqger 19250 | . . . . . . . . 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 738 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐺 ~QG 𝑁) Er (Base‘𝐺)) |
| 21 | simplr 780 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑥 ∈ (Base‘𝐺)) | |
| 22 | ecref 8736 | . . . . . . 7 ⊢ (((𝐺 ~QG 𝑁) Er (Base‘𝐺) ∧ 𝑥 ∈ (Base‘𝐺)) → 𝑥 ∈ [𝑥](𝐺 ~QG 𝑁)) | |
| 23 | 20, 21, 22 | syl2anc 595 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑥 ∈ [𝑥](𝐺 ~QG 𝑁)) |
| 24 | simpr 489 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑌 = [𝑥](𝐺 ~QG 𝑁)) | |
| 25 | 23, 24 | eleqtrrd 2866 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑥 ∈ 𝑌) |
| 26 | 24 | fveq2d 6885 | . . . . . 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 738 | . . . . . . 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 738 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑁 ⊆ 𝐾) |
| 33 | 14 | ad2antrr 738 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → 𝑁 ∈ (NrmSGrp‘𝐺)) |
| 34 | 27, 28, 29, 2, 30, 32, 33, 21 | ghmqusnsglem1 19354 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐽‘[𝑥](𝐺 ~QG 𝑁)) = (𝐹‘𝑥)) |
| 35 | 26, 34 | eqtrd 2798 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝐽‘𝑌) = (𝐹‘𝑥)) |
| 36 | 25, 35 | jca 520 | . . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐺)) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝑥 ∈ 𝑌 ∧ (𝐽‘𝑌) = (𝐹‘𝑥))) |
| 37 | 36 | expl 462 | . . 3 ⊢ (𝜑 → ((𝑥 ∈ (Base‘𝐺) ∧ 𝑌 = [𝑥](𝐺 ~QG 𝑁)) → (𝑥 ∈ 𝑌 ∧ (𝐽‘𝑌) = (𝐹‘𝑥)))) |
| 38 | 37 | reximdv2 3175 | . 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 400 = wceq 1570 ∈ wcel 2143 ∃wrex 3089 Vcvv 3455 ⊆ wss 3905 {csn 4589 ∪ cuni 4872 ↦ cmpt 5192 ◡ccnv 5660 “ cima 5664 ‘cfv 6536 (class class class)co 7410 Er wer 8687 [cec 8688 / cqs 8689 Basecbs 17273 0gc0g 17496 /s cqus 17563 Grpcgrp 19004 SubGrpcsubg 19190 NrmSGrpcnsg 19191 ~QG cqg 19192 GrpHom cghm 19287 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11160 ax-resscn 11161 ax-1cn 11162 ax-icn 11163 ax-addcl 11164 ax-addrcl 11165 ax-mulcl 11166 ax-mulrcl 11167 ax-mulcom 11168 ax-addass 11169 ax-mulass 11170 ax-distr 11171 ax-i2m1 11172 ax-1ne0 11173 ax-1rid 11174 ax-rnegex 11175 ax-rrecex 11176 ax-cnre 11177 ax-pre-lttri 11178 ax-pre-lttrn 11179 ax-pre-ltadd 11180 ax-pre-mulgt0 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-ec 8692 df-qs 8696 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9398 df-inf 9399 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11447 df-neg 11448 df-nn 12238 df-2 12307 df-3 12308 df-4 12309 df-5 12310 df-6 12311 df-7 12312 df-8 12313 df-9 12314 df-n0 12509 df-z 12596 df-dec 12716 df-uz 12867 df-fz 13540 df-struct 17211 df-sets 17228 df-slot 17246 df-ndx 17258 df-base 17274 df-ress 17295 df-plusg 17327 df-mulr 17328 df-sca 17330 df-vsca 17331 df-ip 17332 df-tset 17333 df-ple 17334 df-ds 17336 df-0g 17498 df-imas 17566 df-qus 17567 df-mgm 18702 df-sgrp 18781 df-mnd 18797 df-grp 19007 df-minusg 19008 df-subg 19193 df-nsg 19194 df-eqg 19195 df-ghm 19288 |
| This theorem is used by: ghmqusnsg 19356 rhmqusnsg 21434 |
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