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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 8578 | . . . . 5 ⊢ 2o ∈ ω | |
| 2 | 1 | a1i 11 | . . . 4 ⊢ (𝜑 → 2o ∈ ω) |
| 3 | nnfi 9102 | . . . 4 ⊢ (2o ∈ ω → 2o ∈ Fin) | |
| 4 | 2, 3 | syl 17 | . . 3 ⊢ (𝜑 → 2o ∈ Fin) |
| 5 | simpgnsgd.3 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ SimpGrp) | |
| 6 | simpg2nsg 20073 | . . . 4 ⊢ (𝐺 ∈ SimpGrp → (NrmSGrp‘𝐺) ≈ 2o) | |
| 7 | 5, 6 | syl 17 | . . 3 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ 2o) |
| 8 | enfii 9120 | . . 3 ⊢ ((2o ∈ Fin ∧ (NrmSGrp‘𝐺) ≈ 2o) → (NrmSGrp‘𝐺) ∈ Fin) | |
| 9 | 4, 7, 8 | syl2anc 585 | . 2 ⊢ (𝜑 → (NrmSGrp‘𝐺) ∈ Fin) |
| 10 | simpgnsgd.1 | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 11 | simpgnsgd.2 | . . 3 ⊢ 0 = (0g‘𝐺) | |
| 12 | 5 | simpggrpd 20072 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 13 | 10, 11, 12 | 0idnsgd 19146 | . 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 6853 | . . . . . 6 ⊢ (Base‘𝐺) ∈ V | |
| 18 | 16, 17 | eqeltrdi 2844 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ V) |
| 19 | 10, 11, 5 | simpgntrivd 20075 | . . . . . 6 ⊢ (𝜑 → ¬ 𝐵 = { 0 }) |
| 20 | 19 | neqcomd 2746 | . . . . 5 ⊢ (𝜑 → ¬ { 0 } = 𝐵) |
| 21 | 15, 18, 20 | enpr2d 8995 | . . . 4 ⊢ (𝜑 → {{ 0 }, 𝐵} ≈ 2o) |
| 22 | 21 | ensymd 8952 | . . 3 ⊢ (𝜑 → 2o ≈ {{ 0 }, 𝐵}) |
| 23 | entr 8953 | . . 3 ⊢ (((NrmSGrp‘𝐺) ≈ 2o ∧ 2o ≈ {{ 0 }, 𝐵}) → (NrmSGrp‘𝐺) ≈ {{ 0 }, 𝐵}) | |
| 24 | 7, 22, 23 | syl2anc 585 | . 2 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ {{ 0 }, 𝐵}) |
| 25 | 9, 13, 24 | phpeqd 9146 | 1 ⊢ (𝜑 → (NrmSGrp‘𝐺) = {{ 0 }, 𝐵}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 Vcvv 3429 {csn 4567 {cpr 4569 class class class wbr 5085 ‘cfv 6498 ωcom 7817 2oc2o 8399 ≈ cen 8890 Fincfn 8893 Basecbs 17179 0gc0g 17402 NrmSGrpcnsg 19097 SimpGrpcsimpg 20067 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 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 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 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-2o 8406 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-2 12244 df-sets 17134 df-slot 17152 df-ndx 17164 df-base 17180 df-ress 17201 df-plusg 17233 df-0g 17404 df-mgm 18608 df-sgrp 18687 df-mnd 18703 df-submnd 18752 df-grp 18912 df-minusg 18913 df-sbg 18914 df-subg 19099 df-nsg 19100 df-simpg 20068 |
| This theorem is referenced by: simpgnsgeqd 20078 simpgnsgbid 20080 |
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