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Mirrors > Home > MPE Home > Th. List > gexcl3 | Structured version Visualization version GIF version |
Description: If the order of every group element is bounded by 𝑁, the group has finite exponent. (Contributed by Mario Carneiro, 24-Apr-2016.) |
Ref | Expression |
---|---|
gexod.1 | ⊢ 𝑋 = (Base‘𝐺) |
gexod.2 | ⊢ 𝐸 = (gEx‘𝐺) |
gexod.3 | ⊢ 𝑂 = (od‘𝐺) |
Ref | Expression |
---|---|
gexcl3 | ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → 𝐸 ∈ ℕ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 483 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → 𝐺 ∈ Grp) | |
2 | gexod.1 | . . . . . . . 8 ⊢ 𝑋 = (Base‘𝐺) | |
3 | 2 | grpbn0 18608 | . . . . . . 7 ⊢ (𝐺 ∈ Grp → 𝑋 ≠ ∅) |
4 | r19.2z 4425 | . . . . . . 7 ⊢ ((𝑋 ≠ ∅ ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → ∃𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) | |
5 | 3, 4 | sylan 580 | . . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → ∃𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) |
6 | elfzuz2 13261 | . . . . . . . 8 ⊢ ((𝑂‘𝑥) ∈ (1...𝑁) → 𝑁 ∈ (ℤ≥‘1)) | |
7 | nnuz 12621 | . . . . . . . 8 ⊢ ℕ = (ℤ≥‘1) | |
8 | 6, 7 | eleqtrrdi 2850 | . . . . . . 7 ⊢ ((𝑂‘𝑥) ∈ (1...𝑁) → 𝑁 ∈ ℕ) |
9 | 8 | rexlimivw 3211 | . . . . . 6 ⊢ (∃𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁) → 𝑁 ∈ ℕ) |
10 | 5, 9 | syl 17 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → 𝑁 ∈ ℕ) |
11 | 10 | nnnn0d 12293 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → 𝑁 ∈ ℕ0) |
12 | 11 | faccld 13998 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → (!‘𝑁) ∈ ℕ) |
13 | elfzuzb 13250 | . . . . . . . . 9 ⊢ ((𝑂‘𝑥) ∈ (1...𝑁) ↔ ((𝑂‘𝑥) ∈ (ℤ≥‘1) ∧ 𝑁 ∈ (ℤ≥‘(𝑂‘𝑥)))) | |
14 | elnnuz 12622 | . . . . . . . . . 10 ⊢ ((𝑂‘𝑥) ∈ ℕ ↔ (𝑂‘𝑥) ∈ (ℤ≥‘1)) | |
15 | dvdsfac 16035 | . . . . . . . . . 10 ⊢ (((𝑂‘𝑥) ∈ ℕ ∧ 𝑁 ∈ (ℤ≥‘(𝑂‘𝑥))) → (𝑂‘𝑥) ∥ (!‘𝑁)) | |
16 | 14, 15 | sylanbr 582 | . . . . . . . . 9 ⊢ (((𝑂‘𝑥) ∈ (ℤ≥‘1) ∧ 𝑁 ∈ (ℤ≥‘(𝑂‘𝑥))) → (𝑂‘𝑥) ∥ (!‘𝑁)) |
17 | 13, 16 | sylbi 216 | . . . . . . . 8 ⊢ ((𝑂‘𝑥) ∈ (1...𝑁) → (𝑂‘𝑥) ∥ (!‘𝑁)) |
18 | 17 | adantl 482 | . . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → (𝑂‘𝑥) ∥ (!‘𝑁)) |
19 | simpll 764 | . . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → 𝐺 ∈ Grp) | |
20 | simplr 766 | . . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → 𝑥 ∈ 𝑋) | |
21 | 8 | adantl 482 | . . . . . . . . . . 11 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → 𝑁 ∈ ℕ) |
22 | 21 | nnnn0d 12293 | . . . . . . . . . 10 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → 𝑁 ∈ ℕ0) |
23 | 22 | faccld 13998 | . . . . . . . . 9 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → (!‘𝑁) ∈ ℕ) |
24 | 23 | nnzd 12425 | . . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → (!‘𝑁) ∈ ℤ) |
25 | gexod.3 | . . . . . . . . 9 ⊢ 𝑂 = (od‘𝐺) | |
26 | eqid 2738 | . . . . . . . . 9 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
27 | eqid 2738 | . . . . . . . . 9 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
28 | 2, 25, 26, 27 | oddvds 19155 | . . . . . . . 8 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋 ∧ (!‘𝑁) ∈ ℤ) → ((𝑂‘𝑥) ∥ (!‘𝑁) ↔ ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺))) |
29 | 19, 20, 24, 28 | syl3anc 1370 | . . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → ((𝑂‘𝑥) ∥ (!‘𝑁) ↔ ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺))) |
30 | 18, 29 | mpbid 231 | . . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) ∧ (𝑂‘𝑥) ∈ (1...𝑁)) → ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺)) |
31 | 30 | ex 413 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ 𝑋) → ((𝑂‘𝑥) ∈ (1...𝑁) → ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺))) |
32 | 31 | ralimdva 3108 | . . . 4 ⊢ (𝐺 ∈ Grp → (∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁) → ∀𝑥 ∈ 𝑋 ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺))) |
33 | 32 | imp 407 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → ∀𝑥 ∈ 𝑋 ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺)) |
34 | gexod.2 | . . . 4 ⊢ 𝐸 = (gEx‘𝐺) | |
35 | 2, 34, 26, 27 | gexlem2 19187 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ (!‘𝑁) ∈ ℕ ∧ ∀𝑥 ∈ 𝑋 ((!‘𝑁)(.g‘𝐺)𝑥) = (0g‘𝐺)) → 𝐸 ∈ (1...(!‘𝑁))) |
36 | 1, 12, 33, 35 | syl3anc 1370 | . 2 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → 𝐸 ∈ (1...(!‘𝑁))) |
37 | elfznn 13285 | . 2 ⊢ (𝐸 ∈ (1...(!‘𝑁)) → 𝐸 ∈ ℕ) | |
38 | 36, 37 | syl 17 | 1 ⊢ ((𝐺 ∈ Grp ∧ ∀𝑥 ∈ 𝑋 (𝑂‘𝑥) ∈ (1...𝑁)) → 𝐸 ∈ ℕ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∀wral 3064 ∃wrex 3065 ∅c0 4256 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 1c1 10872 ℕcn 11973 ℤcz 12319 ℤ≥cuz 12582 ...cfz 13239 !cfa 13987 ∥ cdvds 15963 Basecbs 16912 0gc0g 17150 Grpcgrp 18577 .gcmg 18700 odcod 19132 gExcgex 19133 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-sup 9201 df-inf 9202 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fl 13512 df-mod 13590 df-seq 13722 df-exp 13783 df-fac 13988 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-dvds 15964 df-0g 17152 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-grp 18580 df-minusg 18581 df-sbg 18582 df-mulg 18701 df-od 19136 df-gex 19137 |
This theorem is referenced by: gexcl2 19194 |
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