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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 8634 | . . . . 5 ⊢ 2o ∈ ω | |
| 2 | 1 | a1i 11 | . . . 4 ⊢ (𝜑 → 2o ∈ ω) |
| 3 | nnfi 9159 | . . . 4 ⊢ (2o ∈ ω → 2o ∈ Fin) | |
| 4 | 2, 3 | syl 18 | . . 3 ⊢ (𝜑 → 2o ∈ Fin) |
| 5 | simpgnsgd.3 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ SimpGrp) | |
| 6 | simpg2nsg 20214 | . . . 4 ⊢ (𝐺 ∈ SimpGrp → (NrmSGrp‘𝐺) ≈ 2o) | |
| 7 | 5, 6 | syl 18 | . . 3 ⊢ (𝜑 → (NrmSGrp‘𝐺) ≈ 2o) |
| 8 | enfii 9177 | . . 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 20213 | . . 3 ⊢ (𝜑 → 𝐺 ∈ Grp) |
| 13 | 10, 11, 12 | 0idnsgd 19283 | . 2 ⊢ (𝜑 → {{ 0 }, 𝐵} ⊆ (NrmSGrp‘𝐺)) |
| 14 | snex 5412 | . . . . . 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 2873 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ V) |
| 19 | 10, 11, 5 | simpgntrivd 20216 | . . . . . 6 ⊢ (𝜑 → ¬ 𝐵 = { 0 }) |
| 20 | 19 | neqcomd 2775 | . . . . 5 ⊢ (𝜑 → ¬ { 0 } = 𝐵) |
| 21 | 15, 18, 20 | enpr2d 9052 | . . . 4 ⊢ (𝜑 → {{ 0 }, 𝐵} ≈ 2o) |
| 22 | 21 | ensymd 9008 | . . 3 ⊢ (𝜑 → 2o ≈ {{ 0 }, 𝐵}) |
| 23 | entr 9009 | . . 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 9203 | 1 ⊢ (𝜑 → (NrmSGrp‘𝐺) = {{ 0 }, 𝐵}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 Vcvv 3457 {csn 4591 {cpr 4593 class class class wbr 5111 ‘cfv 6540 ωcom 7868 2oc2o 8453 ≈ cen 8946 Fincfn 8949 Basecbs 17293 0gc0g 17516 NrmSGrpcnsg 19233 SimpGrpcsimpg 20208 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11173 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-addrcl 11178 ax-mulcl 11179 ax-mulrcl 11180 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-i2m1 11185 ax-1ne0 11186 ax-1rid 11187 ax-rnegex 11188 ax-rrecex 11189 ax-cnre 11190 ax-pre-lttri 11191 ax-pre-lttrn 11192 ax-pre-ltadd 11193 ax-pre-mulgt0 11194 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-2o 8460 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-fin 8953 df-pnf 11262 df-mnf 11263 df-xr 11264 df-ltxr 11265 df-le 11266 df-sub 11460 df-neg 11461 df-nn 12251 df-2 12320 df-sets 17248 df-slot 17266 df-ndx 17278 df-base 17294 df-ress 17315 df-plusg 17347 df-0g 17518 df-mgm 18722 df-sgrp 18811 df-mnd 18827 df-submnd 18881 df-grp 19049 df-minusg 19050 df-sbg 19051 df-subg 19235 df-nsg 19236 df-simpg 20209 |
| This theorem is used by: simpgnsgeqd 20219 simpgnsgbid 20221 |
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