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| Mirrors > Home > MPE Home > Th. List > gicqusker | Structured version Visualization version GIF version | ||
| Description: The image 𝐻 of a group homomorphism 𝐹 is isomorphic with the quotient group 𝑄 over 𝐹's kernel 𝐾. Together with ghmker 19315 and ghmima 19310, this is sometimes called the first isomorphism theorem for groups. (Contributed by Thierry Arnoux, 10-Mar-2025.) |
| Ref | Expression |
|---|---|
| gicqusker.1 | ⊢ 0 = (0g‘𝐻) |
| gicqusker.f | ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) |
| gicqusker.k | ⊢ 𝐾 = (◡𝐹 “ { 0 }) |
| gicqusker.q | ⊢ 𝑄 = (𝐺 /s (𝐺 ~QG 𝐾)) |
| gicqusker.s | ⊢ (𝜑 → ran 𝐹 = (Base‘𝐻)) |
| Ref | Expression |
|---|---|
| gicqusker | ⊢ (𝜑 → 𝑄 ≃𝑔 𝐻) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | gicqusker.1 | . . 3 ⊢ 0 = (0g‘𝐻) | |
| 2 | gicqusker.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) | |
| 3 | gicqusker.k | . . 3 ⊢ 𝐾 = (◡𝐹 “ { 0 }) | |
| 4 | gicqusker.q | . . 3 ⊢ 𝑄 = (𝐺 /s (𝐺 ~QG 𝐾)) | |
| 5 | imaeq2 6062 | . . . . 5 ⊢ (𝑝 = 𝑞 → (𝐹 “ 𝑝) = (𝐹 “ 𝑞)) | |
| 6 | 5 | unieqd 4890 | . . . 4 ⊢ (𝑝 = 𝑞 → ∪ (𝐹 “ 𝑝) = ∪ (𝐹 “ 𝑞)) |
| 7 | 6 | cbvmptv 5220 | . . 3 ⊢ (𝑝 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑝)) = (𝑞 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑞)) |
| 8 | gicqusker.s | . . 3 ⊢ (𝜑 → ran 𝐹 = (Base‘𝐻)) | |
| 9 | 1, 2, 3, 4, 7, 8 | ghmqusker 19360 | . 2 ⊢ (𝜑 → (𝑝 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑝)) ∈ (𝑄 GrpIso 𝐻)) |
| 10 | brgici 19344 | . 2 ⊢ ((𝑝 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑝)) ∈ (𝑄 GrpIso 𝐻) → 𝑄 ≃𝑔 𝐻) | |
| 11 | 9, 10 | syl 18 | 1 ⊢ (𝜑 → 𝑄 ≃𝑔 𝐻) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1568 ∈ wcel 2150 {csn 4594 ∪ cuni 4877 class class class wbr 5114 ↦ cmpt 5197 ◡ccnv 5664 ran crn 5666 “ cima 5668 ‘cfv 6540 (class class class)co 7414 Basecbs 17272 0gc0g 17495 /s cqus 17562 ~QG cqg 19191 GrpHom cghm 19286 GrpIso cgim 19330 ≃𝑔 cgic 19331 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 ax-cnex 11159 ax-resscn 11160 ax-1cn 11161 ax-icn 11162 ax-addcl 11163 ax-addrcl 11164 ax-mulcl 11165 ax-mulrcl 11166 ax-mulcom 11167 ax-addass 11168 ax-mulass 11169 ax-distr 11170 ax-i2m1 11171 ax-1ne0 11172 ax-1rid 11173 ax-rnegex 11174 ax-rrecex 11175 ax-cnre 11176 ax-pre-lttri 11177 ax-pre-lttrn 11178 ax-pre-ltadd 11179 ax-pre-mulgt0 11180 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-nel 3072 df-ral 3087 df-rex 3097 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 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 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8456 df-er 8697 df-ec 8699 df-qs 8703 df-map 8829 df-en 8947 df-dom 8948 df-sdom 8949 df-fin 8950 df-sup 9405 df-inf 9406 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11446 df-neg 11447 df-nn 12237 df-2 12306 df-3 12307 df-4 12308 df-5 12309 df-6 12310 df-7 12311 df-8 12312 df-9 12313 df-n0 12508 df-z 12595 df-dec 12715 df-uz 12866 df-fz 13539 df-struct 17210 df-sets 17227 df-slot 17245 df-ndx 17257 df-base 17273 df-ress 17294 df-plusg 17326 df-mulr 17327 df-sca 17329 df-vsca 17330 df-ip 17331 df-tset 17332 df-ple 17333 df-ds 17335 df-0g 17497 df-imas 17565 df-qus 17566 df-mgm 18701 df-sgrp 18780 df-mnd 18796 df-submnd 18845 df-grp 19006 df-minusg 19007 df-sbg 19008 df-subg 19192 df-nsg 19193 df-eqg 19194 df-ghm 19287 df-gim 19332 df-gic 19333 |
| This theorem is referenced by: (None) |
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