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| Mirrors > Home > MPE Home > Th. List > cyggexb | Structured version Visualization version GIF version | ||
| Description: A finite abelian group is cyclic iff the exponent equals the order of the group. (Contributed by Mario Carneiro, 21-Apr-2016.) |
| Ref | Expression |
|---|---|
| cygctb.1 | ⊢ 𝐵 = (Base‘𝐺) |
| cyggex.o | ⊢ 𝐸 = (gEx‘𝐺) |
| Ref | Expression |
|---|---|
| cyggexb | ⊢ ((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) → (𝐺 ∈ CycGrp ↔ 𝐸 = (♯‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cygctb.1 | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
| 2 | cyggex.o | . . . . 5 ⊢ 𝐸 = (gEx‘𝐺) | |
| 3 | 1, 2 | cyggex 19873 | . . . 4 ⊢ ((𝐺 ∈ CycGrp ∧ 𝐵 ∈ Fin) → 𝐸 = (♯‘𝐵)) |
| 4 | 3 | expcom 413 | . . 3 ⊢ (𝐵 ∈ Fin → (𝐺 ∈ CycGrp → 𝐸 = (♯‘𝐵))) |
| 5 | 4 | adantl 481 | . 2 ⊢ ((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) → (𝐺 ∈ CycGrp → 𝐸 = (♯‘𝐵))) |
| 6 | simpll 767 | . . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → 𝐺 ∈ Abel) | |
| 7 | ablgrp 19760 | . . . . . . 7 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
| 8 | 7 | ad2antrr 727 | . . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → 𝐺 ∈ Grp) |
| 9 | simplr 769 | . . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → 𝐵 ∈ Fin) | |
| 10 | 1, 2 | gexcl2 19564 | . . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ∈ Fin) → 𝐸 ∈ ℕ) |
| 11 | 8, 9, 10 | syl2anc 585 | . . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → 𝐸 ∈ ℕ) |
| 12 | eqid 2737 | . . . . . 6 ⊢ (od‘𝐺) = (od‘𝐺) | |
| 13 | 1, 2, 12 | gexex 19828 | . . . . 5 ⊢ ((𝐺 ∈ Abel ∧ 𝐸 ∈ ℕ) → ∃𝑥 ∈ 𝐵 ((od‘𝐺)‘𝑥) = 𝐸) |
| 14 | 6, 11, 13 | syl2anc 585 | . . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → ∃𝑥 ∈ 𝐵 ((od‘𝐺)‘𝑥) = 𝐸) |
| 15 | simplr 769 | . . . . . . 7 ⊢ ((((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) ∧ 𝑥 ∈ 𝐵) → 𝐸 = (♯‘𝐵)) | |
| 16 | 15 | eqeq2d 2748 | . . . . . 6 ⊢ ((((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) ∧ 𝑥 ∈ 𝐵) → (((od‘𝐺)‘𝑥) = 𝐸 ↔ ((od‘𝐺)‘𝑥) = (♯‘𝐵))) |
| 17 | eqid 2737 | . . . . . . . . . 10 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
| 18 | eqid 2737 | . . . . . . . . . 10 ⊢ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} = {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} | |
| 19 | 1, 17, 18, 12 | cyggenod 19859 | . . . . . . . . 9 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ∈ Fin) → (𝑥 ∈ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} ↔ (𝑥 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑥) = (♯‘𝐵)))) |
| 20 | 8, 9, 19 | syl2anc 585 | . . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → (𝑥 ∈ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} ↔ (𝑥 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑥) = (♯‘𝐵)))) |
| 21 | ne0i 4282 | . . . . . . . . 9 ⊢ (𝑥 ∈ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} → {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} ≠ ∅) | |
| 22 | 1, 17, 18 | iscyg2 19857 | . . . . . . . . . . 11 ⊢ (𝐺 ∈ CycGrp ↔ (𝐺 ∈ Grp ∧ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} ≠ ∅)) |
| 23 | 22 | baib 535 | . . . . . . . . . 10 ⊢ (𝐺 ∈ Grp → (𝐺 ∈ CycGrp ↔ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} ≠ ∅)) |
| 24 | 8, 23 | syl 17 | . . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → (𝐺 ∈ CycGrp ↔ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} ≠ ∅)) |
| 25 | 21, 24 | imbitrrid 246 | . . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → (𝑥 ∈ {𝑦 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵} → 𝐺 ∈ CycGrp)) |
| 26 | 20, 25 | sylbird 260 | . . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → ((𝑥 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑥) = (♯‘𝐵)) → 𝐺 ∈ CycGrp)) |
| 27 | 26 | expdimp 452 | . . . . . 6 ⊢ ((((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) ∧ 𝑥 ∈ 𝐵) → (((od‘𝐺)‘𝑥) = (♯‘𝐵) → 𝐺 ∈ CycGrp)) |
| 28 | 16, 27 | sylbid 240 | . . . . 5 ⊢ ((((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) ∧ 𝑥 ∈ 𝐵) → (((od‘𝐺)‘𝑥) = 𝐸 → 𝐺 ∈ CycGrp)) |
| 29 | 28 | rexlimdva 3139 | . . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → (∃𝑥 ∈ 𝐵 ((od‘𝐺)‘𝑥) = 𝐸 → 𝐺 ∈ CycGrp)) |
| 30 | 14, 29 | mpd 15 | . . 3 ⊢ (((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) ∧ 𝐸 = (♯‘𝐵)) → 𝐺 ∈ CycGrp) |
| 31 | 30 | ex 412 | . 2 ⊢ ((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) → (𝐸 = (♯‘𝐵) → 𝐺 ∈ CycGrp)) |
| 32 | 5, 31 | impbid 212 | 1 ⊢ ((𝐺 ∈ Abel ∧ 𝐵 ∈ Fin) → (𝐺 ∈ CycGrp ↔ 𝐸 = (♯‘𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∃wrex 3062 {crab 3390 ∅c0 4274 ↦ cmpt 5167 ran crn 5632 ‘cfv 6499 (class class class)co 7367 Fincfn 8893 ℕcn 12174 ℤcz 12524 ♯chash 14292 Basecbs 17179 Grpcgrp 18909 .gcmg 19043 odcod 19499 gExcgex 19500 Abelcabl 19756 CycGrpccyg 19852 |
| 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 5308 ax-pr 5376 ax-un 7689 ax-inf2 9562 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 ax-pre-sup 11116 |
| 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-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-disj 5054 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 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 6266 df-ord 6327 df-on 6328 df-lim 6329 df-suc 6330 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-isom 6508 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-oadd 8409 df-omul 8410 df-er 8643 df-ec 8645 df-qs 8649 df-map 8775 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-sup 9355 df-inf 9356 df-oi 9425 df-card 9863 df-acn 9866 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-3 12245 df-n0 12438 df-z 12525 df-uz 12789 df-q 12899 df-rp 12943 df-fz 13462 df-fzo 13609 df-fl 13751 df-mod 13829 df-seq 13964 df-exp 14024 df-fac 14236 df-hash 14293 df-cj 15061 df-re 15062 df-im 15063 df-sqrt 15197 df-abs 15198 df-clim 15450 df-sum 15649 df-dvds 16222 df-gcd 16464 df-prm 16641 df-pc 16808 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-grp 18912 df-minusg 18913 df-sbg 18914 df-mulg 19044 df-subg 19099 df-eqg 19101 df-od 19503 df-gex 19504 df-cmn 19757 df-abl 19758 df-cyg 19853 |
| This theorem is referenced by: (None) |
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