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Mirrors > Home > MPE Home > Th. List > gexdvds3 | Structured version Visualization version GIF version |
Description: The exponent of a finite group divides the order (cardinality) of the group. Corollary of Lagrange's theorem for the order of a subgroup. (Contributed by Mario Carneiro, 24-Apr-2016.) |
Ref | Expression |
---|---|
gexcl2.1 | ⊢ 𝑋 = (Base‘𝐺) |
gexcl2.2 | ⊢ 𝐸 = (gEx‘𝐺) |
Ref | Expression |
---|---|
gexdvds3 | ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) → 𝐸 ∥ (♯‘𝑋)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | gexcl2.1 | . . . . 5 ⊢ 𝑋 = (Base‘𝐺) | |
2 | eqid 2736 | . . . . 5 ⊢ (od‘𝐺) = (od‘𝐺) | |
3 | 1, 2 | oddvds2 19339 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin ∧ 𝑥 ∈ 𝑋) → ((od‘𝐺)‘𝑥) ∥ (♯‘𝑋)) |
4 | 3 | 3expa 1118 | . . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) ∧ 𝑥 ∈ 𝑋) → ((od‘𝐺)‘𝑥) ∥ (♯‘𝑋)) |
5 | 4 | ralrimiva 3141 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) → ∀𝑥 ∈ 𝑋 ((od‘𝐺)‘𝑥) ∥ (♯‘𝑋)) |
6 | hashcl 14248 | . . . . 5 ⊢ (𝑋 ∈ Fin → (♯‘𝑋) ∈ ℕ0) | |
7 | 6 | adantl 482 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) → (♯‘𝑋) ∈ ℕ0) |
8 | 7 | nn0zd 12521 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) → (♯‘𝑋) ∈ ℤ) |
9 | gexcl2.2 | . . . 4 ⊢ 𝐸 = (gEx‘𝐺) | |
10 | 1, 9, 2 | gexdvds2 19358 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ (♯‘𝑋) ∈ ℤ) → (𝐸 ∥ (♯‘𝑋) ↔ ∀𝑥 ∈ 𝑋 ((od‘𝐺)‘𝑥) ∥ (♯‘𝑋))) |
11 | 8, 10 | syldan 591 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) → (𝐸 ∥ (♯‘𝑋) ↔ ∀𝑥 ∈ 𝑋 ((od‘𝐺)‘𝑥) ∥ (♯‘𝑋))) |
12 | 5, 11 | mpbird 256 | 1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ Fin) → 𝐸 ∥ (♯‘𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∀wral 3062 class class class wbr 5103 ‘cfv 6493 Fincfn 8879 ℕ0cn0 12409 ℤcz 12495 ♯chash 14222 ∥ cdvds 16128 Basecbs 17075 Grpcgrp 18740 odcod 19297 gExcgex 19298 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-rep 5240 ax-sep 5254 ax-nul 5261 ax-pow 5318 ax-pr 5382 ax-un 7668 ax-inf2 9573 ax-cnex 11103 ax-resscn 11104 ax-1cn 11105 ax-icn 11106 ax-addcl 11107 ax-addrcl 11108 ax-mulcl 11109 ax-mulrcl 11110 ax-mulcom 11111 ax-addass 11112 ax-mulass 11113 ax-distr 11114 ax-i2m1 11115 ax-1ne0 11116 ax-1rid 11117 ax-rnegex 11118 ax-rrecex 11119 ax-cnre 11120 ax-pre-lttri 11121 ax-pre-lttrn 11122 ax-pre-ltadd 11123 ax-pre-mulgt0 11124 ax-pre-sup 11125 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3351 df-reu 3352 df-rab 3406 df-v 3445 df-sbc 3738 df-csb 3854 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3927 df-nul 4281 df-if 4485 df-pw 4560 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4864 df-int 4906 df-iun 4954 df-disj 5069 df-br 5104 df-opab 5166 df-mpt 5187 df-tr 5221 df-id 5529 df-eprel 5535 df-po 5543 df-so 5544 df-fr 5586 df-se 5587 df-we 5588 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 6251 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6445 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7309 df-ov 7356 df-oprab 7357 df-mpo 7358 df-om 7799 df-1st 7917 df-2nd 7918 df-frecs 8208 df-wrecs 8239 df-recs 8313 df-rdg 8352 df-1o 8408 df-oadd 8412 df-omul 8413 df-er 8644 df-ec 8646 df-qs 8650 df-map 8763 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-sup 9374 df-inf 9375 df-oi 9442 df-card 9871 df-acn 9874 df-pnf 11187 df-mnf 11188 df-xr 11189 df-ltxr 11190 df-le 11191 df-sub 11383 df-neg 11384 df-div 11809 df-nn 12150 df-2 12212 df-3 12213 df-n0 12410 df-z 12496 df-uz 12760 df-rp 12908 df-fz 13417 df-fzo 13560 df-fl 13689 df-mod 13767 df-seq 13899 df-exp 13960 df-hash 14223 df-cj 14976 df-re 14977 df-im 14978 df-sqrt 15112 df-abs 15113 df-clim 15362 df-sum 15563 df-dvds 16129 df-sets 17028 df-slot 17046 df-ndx 17058 df-base 17076 df-ress 17105 df-plusg 17138 df-0g 17315 df-mgm 18489 df-sgrp 18538 df-mnd 18549 df-grp 18743 df-minusg 18744 df-sbg 18745 df-mulg 18864 df-subg 18916 df-eqg 18918 df-od 19301 df-gex 19302 |
This theorem is referenced by: cyggex2 19665 pgpfac1lem3a 19846 |
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