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Mirrors > Home > MPE Home > Th. List > fincygsubgodexd | Structured version Visualization version GIF version |
Description: A finite cyclic group has subgroups of every possible order. (Contributed by Rohan Ridenour, 3-Aug-2023.) |
Ref | Expression |
---|---|
fincygsubgodexd.1 | ⊢ 𝐵 = (Base‘𝐺) |
fincygsubgodexd.2 | ⊢ (𝜑 → 𝐺 ∈ CycGrp) |
fincygsubgodexd.3 | ⊢ (𝜑 → 𝐶 ∥ (♯‘𝐵)) |
fincygsubgodexd.4 | ⊢ (𝜑 → 𝐵 ∈ Fin) |
fincygsubgodexd.5 | ⊢ (𝜑 → 𝐶 ∈ ℕ) |
Ref | Expression |
---|---|
fincygsubgodexd | ⊢ (𝜑 → ∃𝑥 ∈ (SubGrp‘𝐺)(♯‘𝑥) = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fincygsubgodexd.2 | . . 3 ⊢ (𝜑 → 𝐺 ∈ CycGrp) | |
2 | fincygsubgodexd.1 | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
3 | eqid 2738 | . . . . 5 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
4 | 2, 3 | iscyg 19394 | . . . 4 ⊢ (𝐺 ∈ CycGrp ↔ (𝐺 ∈ Grp ∧ ∃𝑦 ∈ 𝐵 ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) |
5 | 4 | simprbi 496 | . . 3 ⊢ (𝐺 ∈ CycGrp → ∃𝑦 ∈ 𝐵 ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵) |
6 | 1, 5 | syl 17 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵) |
7 | eqid 2738 | . . . 4 ⊢ (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦))) = (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦))) | |
8 | cyggrp 19405 | . . . . . 6 ⊢ (𝐺 ∈ CycGrp → 𝐺 ∈ Grp) | |
9 | 1, 8 | syl 17 | . . . . 5 ⊢ (𝜑 → 𝐺 ∈ Grp) |
10 | 9 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → 𝐺 ∈ Grp) |
11 | simprl 767 | . . . 4 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → 𝑦 ∈ 𝐵) | |
12 | fincygsubgodexd.3 | . . . . . 6 ⊢ (𝜑 → 𝐶 ∥ (♯‘𝐵)) | |
13 | fincygsubgodexd.4 | . . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ Fin) | |
14 | 2, 9, 13 | hashfingrpnn 18527 | . . . . . . 7 ⊢ (𝜑 → (♯‘𝐵) ∈ ℕ) |
15 | fincygsubgodexd.5 | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ ℕ) | |
16 | nndivdvds 15900 | . . . . . . 7 ⊢ (((♯‘𝐵) ∈ ℕ ∧ 𝐶 ∈ ℕ) → (𝐶 ∥ (♯‘𝐵) ↔ ((♯‘𝐵) / 𝐶) ∈ ℕ)) | |
17 | 14, 15, 16 | syl2anc 583 | . . . . . 6 ⊢ (𝜑 → (𝐶 ∥ (♯‘𝐵) ↔ ((♯‘𝐵) / 𝐶) ∈ ℕ)) |
18 | 12, 17 | mpbid 231 | . . . . 5 ⊢ (𝜑 → ((♯‘𝐵) / 𝐶) ∈ ℕ) |
19 | 18 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → ((♯‘𝐵) / 𝐶) ∈ ℕ) |
20 | 2, 3, 7, 10, 11, 19 | fincygsubgd 19629 | . . 3 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦))) ∈ (SubGrp‘𝐺)) |
21 | simpr 484 | . . . . 5 ⊢ (((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) ∧ 𝑥 = ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) → 𝑥 = ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) | |
22 | 21 | fveq2d 6760 | . . . 4 ⊢ (((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) ∧ 𝑥 = ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) → (♯‘𝑥) = (♯‘ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦))))) |
23 | eqid 2738 | . . . . . 6 ⊢ ((♯‘𝐵) / ((♯‘𝐵) / 𝐶)) = ((♯‘𝐵) / ((♯‘𝐵) / 𝐶)) | |
24 | eqid 2738 | . . . . . 6 ⊢ (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) | |
25 | simprr 769 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵) | |
26 | 15 | nnne0d 11953 | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ≠ 0) |
27 | divconjdvds 15952 | . . . . . . . 8 ⊢ ((𝐶 ∥ (♯‘𝐵) ∧ 𝐶 ≠ 0) → ((♯‘𝐵) / 𝐶) ∥ (♯‘𝐵)) | |
28 | 12, 26, 27 | syl2anc 583 | . . . . . . 7 ⊢ (𝜑 → ((♯‘𝐵) / 𝐶) ∥ (♯‘𝐵)) |
29 | 28 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → ((♯‘𝐵) / 𝐶) ∥ (♯‘𝐵)) |
30 | 13 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → 𝐵 ∈ Fin) |
31 | 2, 3, 23, 24, 7, 10, 11, 25, 29, 30, 19 | fincygsubgodd 19630 | . . . . 5 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → (♯‘ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) = ((♯‘𝐵) / ((♯‘𝐵) / 𝐶))) |
32 | 31 | adantr 480 | . . . 4 ⊢ (((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) ∧ 𝑥 = ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) → (♯‘ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) = ((♯‘𝐵) / ((♯‘𝐵) / 𝐶))) |
33 | 14 | nncnd 11919 | . . . . . 6 ⊢ (𝜑 → (♯‘𝐵) ∈ ℂ) |
34 | 15 | nncnd 11919 | . . . . . 6 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
35 | 14 | nnne0d 11953 | . . . . . 6 ⊢ (𝜑 → (♯‘𝐵) ≠ 0) |
36 | 33, 34, 35, 26 | ddcand 11701 | . . . . 5 ⊢ (𝜑 → ((♯‘𝐵) / ((♯‘𝐵) / 𝐶)) = 𝐶) |
37 | 36 | ad2antrr 722 | . . . 4 ⊢ (((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) ∧ 𝑥 = ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) → ((♯‘𝐵) / ((♯‘𝐵) / 𝐶)) = 𝐶) |
38 | 22, 32, 37 | 3eqtrd 2782 | . . 3 ⊢ (((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) ∧ 𝑥 = ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)(((♯‘𝐵) / 𝐶)(.g‘𝐺)𝑦)))) → (♯‘𝑥) = 𝐶) |
39 | 20, 38 | rspcedeq1vd 3558 | . 2 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐵 ∧ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑦)) = 𝐵)) → ∃𝑥 ∈ (SubGrp‘𝐺)(♯‘𝑥) = 𝐶) |
40 | 6, 39 | rexlimddv 3219 | 1 ⊢ (𝜑 → ∃𝑥 ∈ (SubGrp‘𝐺)(♯‘𝑥) = 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∃wrex 3064 class class class wbr 5070 ↦ cmpt 5153 ran crn 5581 ‘cfv 6418 (class class class)co 7255 Fincfn 8691 0cc0 10802 / cdiv 11562 ℕcn 11903 ℤcz 12249 ♯chash 13972 ∥ cdvds 15891 Basecbs 16840 Grpcgrp 18492 .gcmg 18615 SubGrpcsubg 18664 CycGrpccyg 19392 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-oadd 8271 df-omul 8272 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-acn 9631 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-fz 13169 df-fl 13440 df-mod 13518 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-dvds 15892 df-gcd 16130 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-0g 17069 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-grp 18495 df-minusg 18496 df-sbg 18497 df-mulg 18616 df-subg 18667 df-od 19051 df-cyg 19393 |
This theorem is referenced by: ablsimpgprmd 19633 |
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