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| Mirrors > Home > MPE Home > Th. List > simpgnsgd | Structured version Visualization version GIF version | ||
| Description: The only normal subgroups of a simple group are the group itself and the trivial group. (Contributed by Rohan Ridenour, 3-Aug-2023.) |
| Ref | Expression |
|---|---|
| simpgnsgd.1 | ⊢ 𝐵 = (Base‘𝐺) |
| simpgnsgd.2 | ⊢ 0 = (0g‘𝐺) |
| simpgnsgd.3 | ⊢ (𝜑 → 𝐺 ∈ SimpGrp) |
| Ref | Expression |
|---|---|
| simpgnsgd | ⊢ (𝜑 → (NrmSGrp‘𝐺) = {{ 0 }, 𝐵}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2onn 8570 | . . . . 5 ⊢ 2o ∈ ω | |
| 2 | 1 | a1i 11 | . . . 4 ⊢ (𝜑 → 2o ∈ ω) |
| 3 | nnfi 9092 | . . . 4 ⊢ (2o ∈ ω → 2o ∈ Fin) | |
| 4 | 2, 3 | syl 17 | . . 3 ⊢ (𝜑 → 2o ∈ Fin) |
| 5 | simpgnsgd.3 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ SimpGrp) | |
| 6 | simpg2nsg 20027 | . . . 4 ⊢ (𝐺 ∈ SimpGrp → (NrmSGrp‘𝐺) ≈ 2o) | |
| 7 | 5, 6 | syl 17 | . . 3 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ 2o) |
| 8 | enfii 9110 | . . 3 ⊢ ((2o ∈ Fin ∧ (NrmSGrp‘𝐺) ≈ 2o) → (NrmSGrp‘𝐺) ∈ Fin) | |
| 9 | 4, 7, 8 | syl2anc 584 | . 2 ⊢ (𝜑 → (NrmSGrp‘𝐺) ∈ Fin) |
| 10 | simpgnsgd.1 | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 11 | simpgnsgd.2 | . . 3 ⊢ 0 = (0g‘𝐺) | |
| 12 | 5 | simpggrpd 20026 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 13 | 10, 11, 12 | 0idnsgd 19100 | . 2 ⊢ (𝜑 → {{ 0 }, 𝐵} ⊆ (NrmSGrp‘𝐺)) |
| 14 | snex 5381 | . . . . . 6 ⊢ { 0 } ∈ V | |
| 15 | 14 | a1i 11 | . . . . 5 ⊢ (𝜑 → { 0 } ∈ V) |
| 16 | 10 | a1i 11 | . . . . . 6 ⊢ (𝜑 → 𝐵 = (Base‘𝐺)) |
| 17 | fvex 6847 | . . . . . 6 ⊢ (Base‘𝐺) ∈ V | |
| 18 | 16, 17 | eqeltrdi 2844 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ V) |
| 19 | 10, 11, 5 | simpgntrivd 20029 | . . . . . 6 ⊢ (𝜑 → ¬ 𝐵 = { 0 }) |
| 20 | 19 | neqcomd 2746 | . . . . 5 ⊢ (𝜑 → ¬ { 0 } = 𝐵) |
| 21 | 15, 18, 20 | enpr2d 8985 | . . . 4 ⊢ (𝜑 → {{ 0 }, 𝐵} ≈ 2o) |
| 22 | 21 | ensymd 8942 | . . 3 ⊢ (𝜑 → 2o ≈ {{ 0 }, 𝐵}) |
| 23 | entr 8943 | . . 3 ⊢ (((NrmSGrp‘𝐺) ≈ 2o ∧ 2o ≈ {{ 0 }, 𝐵}) → (NrmSGrp‘𝐺) ≈ {{ 0 }, 𝐵}) | |
| 24 | 7, 22, 23 | syl2anc 584 | . 2 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ {{ 0 }, 𝐵}) |
| 25 | 9, 13, 24 | phpeqd 9136 | 1 ⊢ (𝜑 → (NrmSGrp‘𝐺) = {{ 0 }, 𝐵}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 Vcvv 3440 {csn 4580 {cpr 4582 class class class wbr 5098 ‘cfv 6492 ωcom 7808 2oc2o 8391 ≈ cen 8880 Fincfn 8883 Basecbs 17136 0gc0g 17359 NrmSGrpcnsg 19051 SimpGrpcsimpg 20021 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-cnex 11082 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-1o 8397 df-2o 8398 df-er 8635 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-nn 12146 df-2 12208 df-sets 17091 df-slot 17109 df-ndx 17121 df-base 17137 df-ress 17158 df-plusg 17190 df-0g 17361 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-submnd 18709 df-grp 18866 df-minusg 18867 df-sbg 18868 df-subg 19053 df-nsg 19054 df-simpg 20022 |
| This theorem is referenced by: simpgnsgeqd 20032 simpgnsgbid 20034 |
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