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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 2737 | . . . 4 ⊢ ((toInc‘𝑆)MGalConn(toInc‘𝑇)) = ((toInc‘𝑆)MGalConn(toInc‘𝑇)) | |
| 2 | nsgqusf1o.s | . . . . . 6 ⊢ 𝑆 = {ℎ ∈ (SubGrp‘𝐺) ∣ 𝑁 ⊆ ℎ} | |
| 3 | fvex 6855 | . . . . . 6 ⊢ (SubGrp‘𝐺) ∈ V | |
| 4 | 2, 3 | rabex2 5288 | . . . . 5 ⊢ 𝑆 ∈ V |
| 5 | eqid 2737 | . . . . . 6 ⊢ (toInc‘𝑆) = (toInc‘𝑆) | |
| 6 | 5 | ipobas 18466 | . . . . 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 6856 | . . . . 5 ⊢ 𝑇 ∈ V |
| 10 | eqid 2737 | . . . . . 6 ⊢ (toInc‘𝑇) = (toInc‘𝑇) | |
| 11 | 10 | ipobas 18466 | . . . . 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 18471 | . . . . 5 ⊢ (toInc‘𝑆) ∈ Poset |
| 16 | 15 | a1i 11 | . . . 4 ⊢ (𝜑 → (toInc‘𝑆) ∈ Poset) |
| 17 | 10 | ipopos 18471 | . . . . 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 33505 | . . . 4 ⊢ (𝜑 → 𝐸((toInc‘𝑆)MGalConn(toInc‘𝑇))𝐹) |
| 26 | 1, 7, 12, 13, 14, 16, 18, 25 | mgcf1o 33096 | . . 3 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) Isom ≤ , ≲ (ran 𝐹, ran 𝐸)) |
| 27 | isof1o 7279 | . . 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 33508 | . . . . 5 ⊢ (𝜑 → ran 𝐹 = 𝑆) |
| 30 | 29 | reseq2d 5946 | . . . 4 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) = (𝐸 ↾ 𝑆)) |
| 31 | nfv 1916 | . . . . . 6 ⊢ Ⅎℎ𝜑 | |
| 32 | vex 3446 | . . . . . . . . 9 ⊢ ℎ ∈ V | |
| 33 | 32 | mptex 7179 | . . . . . . . 8 ⊢ (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁)) ∈ V |
| 34 | 33 | rnex 7862 | . . . . . . 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 6641 | . . . . 5 ⊢ (𝜑 → 𝐸 Fn 𝑆) |
| 37 | fnresdm 6619 | . . . . 5 ⊢ (𝐸 Fn 𝑆 → (𝐸 ↾ 𝑆) = 𝐸) | |
| 38 | 36, 37 | syl 17 | . . . 4 ⊢ (𝜑 → (𝐸 ↾ 𝑆) = 𝐸) |
| 39 | 30, 38 | eqtrd 2772 | . . 3 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) = 𝐸) |
| 40 | 19, 2, 8, 13, 14, 20, 21, 22, 23, 24 | nsgqusf1olem2 33507 | . . 3 ⊢ (𝜑 → ran 𝐸 = 𝑇) |
| 41 | 39, 29, 40 | f1oeq123d 6776 | . 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 1542 ∈ wcel 2114 {crab 3401 Vcvv 3442 ⊆ wss 3903 {csn 4582 ↦ cmpt 5181 ran crn 5633 ↾ cres 5634 Fn wfn 6495 –1-1-onto→wf1o 6499 ‘cfv 6500 Isom wiso 6501 (class class class)co 7368 Basecbs 17148 lecple 17196 /s cqus 17438 Posetcpo 18242 toInccipo 18462 SubGrpcsubg 19062 NrmSGrpcnsg 19063 ~QG cqg 19064 LSSumclsm 19575 MGalConncmgc 33072 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-tpos 8178 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-er 8645 df-ec 8647 df-qs 8651 df-map 8777 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-sup 9357 df-inf 9358 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-fz 13436 df-struct 17086 df-sets 17103 df-slot 17121 df-ndx 17133 df-base 17149 df-ress 17170 df-plusg 17202 df-mulr 17203 df-sca 17205 df-vsca 17206 df-ip 17207 df-tset 17208 df-ple 17209 df-ocomp 17210 df-ds 17211 df-0g 17373 df-imas 17441 df-qus 17442 df-proset 18229 df-poset 18248 df-ipo 18463 df-mgm 18577 df-sgrp 18656 df-mnd 18672 df-submnd 18721 df-grp 18878 df-minusg 18879 df-subg 19065 df-nsg 19066 df-eqg 19067 df-ghm 19154 df-oppg 19287 df-lsm 19577 df-mnt 33073 df-mgc 33074 |
| This theorem is referenced by: (None) |
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