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Mirrors > Home > MPE Home > Th. List > 0cyg | Structured version Visualization version GIF version |
Description: The trivial group is cyclic. (Contributed by Mario Carneiro, 21-Apr-2016.) |
Ref | Expression |
---|---|
cygctb.1 | ⊢ 𝐵 = (Base‘𝐺) |
Ref | Expression |
---|---|
0cyg | ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → 𝐺 ∈ CycGrp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cygctb.1 | . 2 ⊢ 𝐵 = (Base‘𝐺) | |
2 | eqid 2738 | . 2 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
3 | simpl 483 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → 𝐺 ∈ Grp) | |
4 | eqid 2738 | . . . 4 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
5 | 1, 4 | grpidcl 18607 | . . 3 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ 𝐵) |
6 | 5 | adantr 481 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → (0g‘𝐺) ∈ 𝐵) |
7 | 0z 12330 | . . 3 ⊢ 0 ∈ ℤ | |
8 | en1eqsn 9048 | . . . . . . . 8 ⊢ (((0g‘𝐺) ∈ 𝐵 ∧ 𝐵 ≈ 1o) → 𝐵 = {(0g‘𝐺)}) | |
9 | 5, 8 | sylan 580 | . . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → 𝐵 = {(0g‘𝐺)}) |
10 | 9 | eleq2d 2824 | . . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → (𝑥 ∈ 𝐵 ↔ 𝑥 ∈ {(0g‘𝐺)})) |
11 | 10 | biimpa 477 | . . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ {(0g‘𝐺)}) |
12 | velsn 4577 | . . . . 5 ⊢ (𝑥 ∈ {(0g‘𝐺)} ↔ 𝑥 = (0g‘𝐺)) | |
13 | 11, 12 | sylib 217 | . . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) ∧ 𝑥 ∈ 𝐵) → 𝑥 = (0g‘𝐺)) |
14 | 1, 4, 2 | mulg0 18707 | . . . . . 6 ⊢ ((0g‘𝐺) ∈ 𝐵 → (0(.g‘𝐺)(0g‘𝐺)) = (0g‘𝐺)) |
15 | 6, 14 | syl 17 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → (0(.g‘𝐺)(0g‘𝐺)) = (0g‘𝐺)) |
16 | 15 | adantr 481 | . . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) ∧ 𝑥 ∈ 𝐵) → (0(.g‘𝐺)(0g‘𝐺)) = (0g‘𝐺)) |
17 | 13, 16 | eqtr4d 2781 | . . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) ∧ 𝑥 ∈ 𝐵) → 𝑥 = (0(.g‘𝐺)(0g‘𝐺))) |
18 | oveq1 7282 | . . . 4 ⊢ (𝑛 = 0 → (𝑛(.g‘𝐺)(0g‘𝐺)) = (0(.g‘𝐺)(0g‘𝐺))) | |
19 | 18 | rspceeqv 3575 | . . 3 ⊢ ((0 ∈ ℤ ∧ 𝑥 = (0(.g‘𝐺)(0g‘𝐺))) → ∃𝑛 ∈ ℤ 𝑥 = (𝑛(.g‘𝐺)(0g‘𝐺))) |
20 | 7, 17, 19 | sylancr 587 | . 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) ∧ 𝑥 ∈ 𝐵) → ∃𝑛 ∈ ℤ 𝑥 = (𝑛(.g‘𝐺)(0g‘𝐺))) |
21 | 1, 2, 3, 6, 20 | iscygd 19487 | 1 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ≈ 1o) → 𝐺 ∈ CycGrp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∃wrex 3065 {csn 4561 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 1oc1o 8290 ≈ cen 8730 0cc0 10871 ℤcz 12319 Basecbs 16912 0gc0g 17150 Grpcgrp 18577 .gcmg 18700 CycGrpccyg 19477 |
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 |
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-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-z 12320 df-uz 12583 df-fz 13240 df-seq 13722 df-0g 17152 df-mgm 18326 df-sgrp 18375 df-mnd 18386 df-grp 18580 df-minusg 18581 df-mulg 18701 df-cyg 19478 |
This theorem is referenced by: lt6abl 19496 frgpcyg 20781 |
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