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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 19417 and ghmima 19412, 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 6046 | . . . . 5 ⊢ (𝑝 = 𝑞 → (𝐹 “ 𝑝) = (𝐹 “ 𝑞)) | |
| 6 | 5 | unieqd 4879 | . . . 4 ⊢ (𝑝 = 𝑞 → ∪ (𝐹 “ 𝑝) = ∪ (𝐹 “ 𝑞)) |
| 7 | 6 | cbvmptv 5208 | . . 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 19462 | . 2 ⊢ (𝜑 → (𝑝 ∈ (Base‘𝑄) ↦ ∪ (𝐹 “ 𝑝)) ∈ (𝑄 GrpIso 𝐻)) |
| 10 | brgici 19446 | . 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 |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 {csn 4583 ∪ cuni 4866 class class class wbr 5102 ↦ cmpt 5185 ◡ccnv 5646 ran crn 5648 “ cima 5650 ‘cfv 6527 (class class class)co 7408 Basecbs 17348 0gc0g 17571 /s cqus 17638 ~QG cqg 19293 GrpHom cghm 19388 GrpIso cgim 19432 ≃𝑔 cgic 19433 |
| 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 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-cnex 11227 ax-resscn 11228 ax-1cn 11229 ax-icn 11230 ax-addcl 11231 ax-addrcl 11232 ax-mulcl 11233 ax-mulrcl 11234 ax-mulcom 11235 ax-addass 11236 ax-mulass 11237 ax-distr 11238 ax-i2m1 11239 ax-1ne0 11240 ax-1rid 11241 ax-rnegex 11242 ax-rrecex 11243 ax-cnre 11244 ax-pre-lttri 11245 ax-pre-lttrn 11246 ax-pre-ltadd 11247 ax-pre-mulgt0 11248 |
| 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 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-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 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 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7861 df-1st 7984 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8454 df-er 8695 df-ec 8697 df-qs 8701 df-map 8827 df-en 8952 df-dom 8953 df-sdom 8954 df-fin 8955 df-sup 9412 df-inf 9413 df-pnf 11316 df-mnf 11317 df-xr 11318 df-ltxr 11319 df-le 11320 df-sub 11514 df-neg 11515 df-nn 12305 df-2 12374 df-3 12375 df-4 12376 df-5 12377 df-6 12378 df-7 12379 df-8 12380 df-9 12381 df-n0 12576 df-z 12663 df-dec 12784 df-uz 12935 df-fz 13609 df-struct 17286 df-sets 17303 df-slot 17321 df-ndx 17333 df-base 17349 df-ress 17370 df-plusg 17402 df-mulr 17403 df-sca 17405 df-vsca 17406 df-ip 17407 df-tset 17408 df-ple 17409 df-ds 17411 df-0g 17573 df-imas 17641 df-qus 17642 df-mgm 18777 df-sgrp 18869 df-mnd 18885 df-submnd 18940 df-grp 19108 df-minusg 19109 df-sbg 19110 df-subg 19294 df-nsg 19295 df-eqg 19296 df-ghm 19389 df-gim 19434 df-gic 19435 |
| This theorem is used by: (None) |
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