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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 8651 | . . . . 5 ⊢ 2o ∈ ω | |
| 2 | 1 | a1i 11 | . . . 4 ⊢ (𝜑 → 2o ∈ ω) |
| 3 | nnfi 9183 | . . . 4 ⊢ (2o ∈ ω → 2o ∈ Fin) | |
| 4 | 2, 3 | syl 18 | . . 3 ⊢ (𝜑 → 2o ∈ Fin) |
| 5 | simpgnsgd.3 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ SimpGrp) | |
| 6 | simpg2nsg 20312 | . . . 4 ⊢ (𝐺 ∈ SimpGrp → (NrmSGrp‘𝐺) ≈ 2o) | |
| 7 | 5, 6 | syl 18 | . . 3 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ 2o) |
| 8 | enfii 9201 | . . 3 ⊢ ((2o ∈ Fin ∧ (NrmSGrp‘𝐺) ≈ 2o) → (NrmSGrp‘𝐺) ∈ Fin) | |
| 9 | 4, 7, 8 | syl2anc 596 | . 2 ⊢ (𝜑 → (NrmSGrp‘𝐺) ∈ Fin) |
| 10 | simpgnsgd.1 | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 11 | simpgnsgd.2 | . . 3 ⊢ 0 = (0g‘𝐺) | |
| 12 | 5 | simpggrpd 20311 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 13 | 10, 11, 12 | 0idnsgd 19381 | . 2 ⊢ (𝜑 → {{ 0 }, 𝐵} ⊆ (NrmSGrp‘𝐺)) |
| 14 | snex 5397 | . . . . . 6 ⊢ { 0 } ∈ V | |
| 15 | 14 | a1i 11 | . . . . 5 ⊢ (𝜑 → { 0 } ∈ V) |
| 16 | 10 | a1i 11 | . . . . . 6 ⊢ (𝜑 → 𝐵 = (Base‘𝐺)) |
| 17 | fvex 6898 | . . . . . 6 ⊢ (Base‘𝐺) ∈ V | |
| 18 | 16, 17 | eqeltrdi 2869 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ V) |
| 19 | 10, 11, 5 | simpgntrivd 20314 | . . . . . 6 ⊢ (𝜑 → ¬ 𝐵 = { 0 }) |
| 20 | 19 | neqcomd 2771 | . . . . 5 ⊢ (𝜑 → ¬ { 0 } = 𝐵) |
| 21 | 15, 18, 20 | enpr2d 9076 | . . . 4 ⊢ (𝜑 → {{ 0 }, 𝐵} ≈ 2o) |
| 22 | 21 | ensymd 9032 | . . 3 ⊢ (𝜑 → 2o ≈ {{ 0 }, 𝐵}) |
| 23 | entr 9033 | . . 3 ⊢ (((NrmSGrp‘𝐺) ≈ 2o ∧ 2o ≈ {{ 0 }, 𝐵}) → (NrmSGrp‘𝐺) ≈ {{ 0 }, 𝐵}) | |
| 24 | 7, 22, 23 | syl2anc 596 | . 2 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ {{ 0 }, 𝐵}) |
| 25 | 9, 13, 24 | phpeqd 9227 | 1 ⊢ (𝜑 → (NrmSGrp‘𝐺) = {{ 0 }, 𝐵}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 Vcvv 3451 {csn 4584 {cpr 4586 class class class wbr 5103 ‘cfv 6538 ωcom 7877 2oc2o 8470 ≈ cen 8970 Fincfn 8973 Basecbs 17387 0gc0g 17610 NrmSGrpcnsg 19331 SimpGrpcsimpg 20306 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-2o 8477 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-sets 17342 df-slot 17360 df-ndx 17372 df-base 17388 df-ress 17409 df-plusg 17441 df-0g 17612 df-mgm 18816 df-sgrp 18908 df-mnd 18924 df-submnd 18979 df-grp 19147 df-minusg 19148 df-sbg 19149 df-subg 19333 df-nsg 19334 df-simpg 20307 |
| This theorem is used by: simpgnsgeqd 20317 simpgnsgbid 20319 |
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