| Mathbox for Thierry Arnoux |
< Previous
Next >
Nearby theorems |
||
| 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 6848 | . . . . . 6 ⊢ (SubGrp‘𝐺) ∈ V | |
| 4 | 2, 3 | rabex2 5279 | . . . . 5 ⊢ 𝑆 ∈ V |
| 5 | eqid 2737 | . . . . . 6 ⊢ (toInc‘𝑆) = (toInc‘𝑆) | |
| 6 | 5 | ipobas 18491 | . . . . 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 6849 | . . . . 5 ⊢ 𝑇 ∈ V |
| 10 | eqid 2737 | . . . . . 6 ⊢ (toInc‘𝑇) = (toInc‘𝑇) | |
| 11 | 10 | ipobas 18491 | . . . . 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 18496 | . . . . 5 ⊢ (toInc‘𝑆) ∈ Poset |
| 16 | 15 | a1i 11 | . . . 4 ⊢ (𝜑 → (toInc‘𝑆) ∈ Poset) |
| 17 | 10 | ipopos 18496 | . . . . 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 33490 | . . . 4 ⊢ (𝜑 → 𝐸((toInc‘𝑆)MGalConn(toInc‘𝑇))𝐹) |
| 26 | 1, 7, 12, 13, 14, 16, 18, 25 | mgcf1o 33081 | . . 3 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) Isom ≤ , ≲ (ran 𝐹, ran 𝐸)) |
| 27 | isof1o 7272 | . . 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 33493 | . . . . 5 ⊢ (𝜑 → ran 𝐹 = 𝑆) |
| 30 | 29 | reseq2d 5939 | . . . 4 ⊢ (𝜑 → (𝐸 ↾ ran 𝐹) = (𝐸 ↾ 𝑆)) |
| 31 | nfv 1916 | . . . . . 6 ⊢ Ⅎℎ𝜑 | |
| 32 | vex 3434 | . . . . . . . . 9 ⊢ ℎ ∈ V | |
| 33 | 32 | mptex 7172 | . . . . . . . 8 ⊢ (𝑥 ∈ ℎ ↦ ({𝑥} ⊕ 𝑁)) ∈ V |
| 34 | 33 | rnex 7855 | . . . . . . 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 6634 | . . . . 5 ⊢ (𝜑 → 𝐸 Fn 𝑆) |
| 37 | fnresdm 6612 | . . . . 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 33492 | . . 3 ⊢ (𝜑 → ran 𝐸 = 𝑇) |
| 41 | 39, 29, 40 | f1oeq123d 6769 | . 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 3390 Vcvv 3430 ⊆ wss 3890 {csn 4568 ↦ cmpt 5167 ran crn 5626 ↾ cres 5627 Fn wfn 6488 –1-1-onto→wf1o 6492 ‘cfv 6493 Isom wiso 6494 (class class class)co 7361 Basecbs 17173 lecple 17221 /s cqus 17463 Posetcpo 18267 toInccipo 18487 SubGrpcsubg 19090 NrmSGrpcnsg 19091 ~QG cqg 19092 LSSumclsm 19603 MGalConncmgc 33057 |
| 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 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 |
| 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 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-1st 7936 df-2nd 7937 df-tpos 8170 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-er 8637 df-ec 8639 df-qs 8643 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-sup 9349 df-inf 9350 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-nn 12169 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 df-9 12245 df-n0 12432 df-z 12519 df-dec 12639 df-uz 12783 df-fz 13456 df-struct 17111 df-sets 17128 df-slot 17146 df-ndx 17158 df-base 17174 df-ress 17195 df-plusg 17227 df-mulr 17228 df-sca 17230 df-vsca 17231 df-ip 17232 df-tset 17233 df-ple 17234 df-ocomp 17235 df-ds 17236 df-0g 17398 df-imas 17466 df-qus 17467 df-proset 18254 df-poset 18273 df-ipo 18488 df-mgm 18602 df-sgrp 18681 df-mnd 18697 df-submnd 18746 df-grp 18906 df-minusg 18907 df-subg 19093 df-nsg 19094 df-eqg 19095 df-ghm 19182 df-oppg 19315 df-lsm 19605 df-mnt 33058 df-mgc 33059 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |