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| Mirrors > Home > MPE Home > Th. List > Mathboxes > nsgqusf1o | Structured version Visualization version GIF version | ||
| Description: The canonical projection homomorphism 𝐸 defines a bijective correspondence between the set 𝑆 of subgroups of 𝐺 containing a normal subgroup 𝑁 and the subgroups of the quotient group 𝐺 / 𝑁. This theorem is sometimes called the correspondence theorem, or the fourth isomorphism theorem. (Contributed by Thierry Arnoux, 4-Aug-2024.) |
| Ref | Expression |
|---|---|
| nsgqusf1o.b | ⊢ 𝐵 = (Base‘𝐺) |
| nsgqusf1o.s | ⊢ 𝑆 = {ℎ ∈ (SubGrp‘𝐺) ∣ 𝑁 ⊆ ℎ} |
| nsgqusf1o.t | ⊢ 𝑇 = (SubGrp‘𝑄) |
| nsgqusf1o.1 | ⊢ ≤ = (le‘(toInc‘𝑆)) |
| nsgqusf1o.2 | ⊢ ≲ = (le‘(toInc‘𝑇)) |
| nsgqusf1o.q | ⊢ 𝑄 = (𝐺 /s (𝐺 ~QG 𝑁)) |
| nsgqusf1o.p | ⊢ ⊕ = (LSSum‘𝐺) |
| nsgqusf1o.e | ⊢ 𝐸 = (ℎ ∈ 𝑆 ↦ ran (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁))) |
| nsgqusf1o.f | ⊢ 𝐹 = (𝑓 ∈ 𝑇 ↦ {𝑎 ∈ 𝐵 ∣ ({𝑎} ⊕ 𝑁) ∈ 𝑓}) |
| nsgqusf1o.n | ⊢ (𝜑 → 𝑁 ∈ (NrmSGrp‘𝐺)) |
| Ref | Expression |
|---|---|
| nsgqusf1o | ⊢ (𝜑 → 𝐸:𝑆–1-1-onto→𝑇) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2736 | . . . 4 ⊢ ((toInc‘𝑆)MGalConn(toInc‘𝑇)) = ((toInc‘𝑆)MGalConn(toInc‘𝑇)) | |
| 2 | nsgqusf1o.s | . . . . . 6 ⊢ 𝑆 = {ℎ ∈ (SubGrp‘𝐺) ∣ 𝑁 ⊆ ℎ} | |
| 3 | fvex 6894 | . . . . . 6 ⊢ (SubGrp‘𝐺) ∈ V | |
| 4 | 2, 3 | rabex2 5316 | . . . . 5 ⊢ 𝑆 ∈ V |
| 5 | eqid 2736 | . . . . . 6 ⊢ (toInc‘𝑆) = (toInc‘𝑆) | |
| 6 | 5 | ipobas 18546 | . . . . 5 ⊢ (𝑆 ∈ V → 𝑆 = (Base‘(toInc‘𝑆))) |
| 7 | 4, 6 | ax-mp 5 | . . . 4 ⊢ 𝑆 = (Base‘(toInc‘𝑆)) |
| 8 | nsgqusf1o.t | . . . . . 6 ⊢ 𝑇 = (SubGrp‘𝑄) | |
| 9 | 8 | fvexi 6895 | . . . . 5 ⊢ 𝑇 ∈ V |
| 10 | eqid 2736 | . . . . . 6 ⊢ (toInc‘𝑇) = (toInc‘𝑇) | |
| 11 | 10 | ipobas 18546 | . . . . 5 ⊢ (𝑇 ∈ V → 𝑇 = (Base‘(toInc‘𝑇))) |
| 12 | 9, 11 | ax-mp 5 | . . . 4 ⊢ 𝑇 = (Base‘(toInc‘𝑇)) |
| 13 | nsgqusf1o.1 | . . . 4 ⊢ ≤ = (le‘(toInc‘𝑆)) | |
| 14 | nsgqusf1o.2 | . . . 4 ⊢ ≲ = (le‘(toInc‘𝑇)) | |
| 15 | 5 | ipopos 18551 | . . . . 5 ⊢ (toInc‘𝑆) ∈ Poset |
| 16 | 15 | a1i 11 | . . . 4 ⊢ (𝜑 → (toInc‘𝑆) ∈ Poset) |
| 17 | 10 | ipopos 18551 | . . . . 5 ⊢ (toInc‘𝑇) ∈ Poset |
| 18 | 17 | a1i 11 | . . . 4 ⊢ (𝜑 → (toInc‘𝑇) ∈ Poset) |
| 19 | nsgqusf1o.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
| 20 | nsgqusf1o.q | . . . . 5 ⊢ 𝑄 = (𝐺 /s (𝐺 ~QG 𝑁)) | |
| 21 | nsgqusf1o.p | . . . . 5 ⊢ ⊕ = (LSSum‘𝐺) | |
| 22 | nsgqusf1o.e | . . . . 5 ⊢ 𝐸 = (ℎ ∈ 𝑆 ↦ ran (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁))) | |
| 23 | nsgqusf1o.f | . . . . 5 ⊢ 𝐹 = (𝑓 ∈ 𝑇 ↦ {𝑎 ∈ 𝐵 ∣ ({𝑎} ⊕ 𝑁) ∈ 𝑓}) | |
| 24 | nsgqusf1o.n | . . . . 5 ⊢ (𝜑 → 𝑁 ∈ (NrmSGrp‘𝐺)) | |
| 25 | 19, 2, 8, 1, 5, 10, 20, 21, 22, 23, 24 | nsgmgc 33432 | . . . 4 ⊢ (𝜑 → 𝐸((toInc‘𝑆)MGalConn(toInc‘𝑇))𝐹) |
| 26 | 1, 7, 12, 13, 14, 16, 18, 25 | mgcf1o 32988 | . . 3 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) Isom ≤ , ≲ (ran 𝐹, ran 𝐸)) |
| 27 | isof1o 7321 | . . 3 ⊢ ((𝐸 ↾ ran 𝐹) Isom ≤ , ≲ (ran 𝐹, ran 𝐸) → (𝐸 ↾ ran 𝐹):ran 𝐹–1-1-onto→ran 𝐸) | |
| 28 | 26, 27 | syl 17 | . 2 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹):ran 𝐹–1-1-onto→ran 𝐸) |
| 29 | 19, 2, 8, 13, 14, 20, 21, 22, 23, 24 | nsgqusf1olem3 33435 | . . . . 5 ⊢ (𝜑 → ran 𝐹 = 𝑆) |
| 30 | 29 | reseq2d 5971 | . . . 4 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) = (𝐸 ↾ 𝑆)) |
| 31 | nfv 1914 | . . . . . 6 ⊢ Ⅎℎ𝜑 | |
| 32 | vex 3468 | . . . . . . . . 9 ⊢ ℎ ∈ V | |
| 33 | 32 | mptex 7220 | . . . . . . . 8 ⊢ (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁)) ∈ V |
| 34 | 33 | rnex 7911 | . . . . . . 7 ⊢ ran (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁)) ∈ V |
| 35 | 34 | a1i 11 | . . . . . 6 ⊢ ((𝜑 ∧ ℎ ∈ 𝑆) → ran (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁)) ∈ V) |
| 36 | 31, 35, 22 | fnmptd 6684 | . . . . 5 ⊢ (𝜑 → 𝐸 Fn 𝑆) |
| 37 | fnresdm 6662 | . . . . 5 ⊢ (𝐸 Fn 𝑆 → (𝐸 ↾ 𝑆) = 𝐸) | |
| 38 | 36, 37 | syl 17 | . . . 4 ⊢ (𝜑 → (𝐸 ↾ 𝑆) = 𝐸) |
| 39 | 30, 38 | eqtrd 2771 | . . 3 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) = 𝐸) |
| 40 | 19, 2, 8, 13, 14, 20, 21, 22, 23, 24 | nsgqusf1olem2 33434 | . . 3 ⊢ (𝜑 → ran 𝐸 = 𝑇) |
| 41 | 39, 29, 40 | f1oeq123d 6817 | . 2 ⊢ (𝜑 → ((𝐸 ↾ ran 𝐹):ran 𝐹–1-1-onto→ran 𝐸 ↔ 𝐸:𝑆–1-1-onto→𝑇)) |
| 42 | 28, 41 | mpbid 232 | 1 ⊢ (𝜑 → 𝐸:𝑆–1-1-onto→𝑇) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 {crab 3420 Vcvv 3464 ⊆ wss 3931 {csn 4606 ↦ cmpt 5206 ran crn 5660 ↾ cres 5661 Fn wfn 6531 –1-1-onto→wf1o 6535 ‘cfv 6536 Isom wiso 6537 (class class class)co 7410 Basecbs 17233 lecple 17283 /s cqus 17524 Posetcpo 18324 toInccipo 18542 SubGrpcsubg 19108 NrmSGrpcnsg 19109 ~QG cqg 19110 LSSumclsm 19620 MGalConncmgc 32964 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-rep 5254 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-cnex 11190 ax-resscn 11191 ax-1cn 11192 ax-icn 11193 ax-addcl 11194 ax-addrcl 11195 ax-mulcl 11196 ax-mulrcl 11197 ax-mulcom 11198 ax-addass 11199 ax-mulass 11200 ax-distr 11201 ax-i2m1 11202 ax-1ne0 11203 ax-1rid 11204 ax-rnegex 11205 ax-rrecex 11206 ax-cnre 11207 ax-pre-lttri 11208 ax-pre-lttrn 11209 ax-pre-ltadd 11210 ax-pre-mulgt0 11211 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-tp 4611 df-op 4613 df-uni 4889 df-iun 4974 df-br 5125 df-opab 5187 df-mpt 5207 df-tr 5235 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6295 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7867 df-1st 7993 df-2nd 7994 df-tpos 8230 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-er 8724 df-ec 8726 df-qs 8730 df-map 8847 df-en 8965 df-dom 8966 df-sdom 8967 df-fin 8968 df-sup 9459 df-inf 9460 df-pnf 11276 df-mnf 11277 df-xr 11278 df-ltxr 11279 df-le 11280 df-sub 11473 df-neg 11474 df-nn 12246 df-2 12308 df-3 12309 df-4 12310 df-5 12311 df-6 12312 df-7 12313 df-8 12314 df-9 12315 df-n0 12507 df-z 12594 df-dec 12714 df-uz 12858 df-fz 13530 df-struct 17171 df-sets 17188 df-slot 17206 df-ndx 17218 df-base 17234 df-ress 17257 df-plusg 17289 df-mulr 17290 df-sca 17292 df-vsca 17293 df-ip 17294 df-tset 17295 df-ple 17296 df-ocomp 17297 df-ds 17298 df-0g 17460 df-imas 17527 df-qus 17528 df-proset 18311 df-poset 18330 df-ipo 18543 df-mgm 18623 df-sgrp 18702 df-mnd 18718 df-submnd 18767 df-grp 18924 df-minusg 18925 df-subg 19111 df-nsg 19112 df-eqg 19113 df-ghm 19201 df-oppg 19334 df-lsm 19622 df-mnt 32965 df-mgc 32966 |
| This theorem is referenced by: (None) |
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