Step | Hyp | Ref
| Expression |
1 | | cygctb.1 |
. . 3
⊢ 𝐵 = (Base‘𝐺) |
2 | | eqid 2738 |
. . 3
⊢
(.g‘𝐺) = (.g‘𝐺) |
3 | | eqid 2738 |
. . 3
⊢ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} = {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} |
4 | 1, 2, 3 | iscyg2 19397 |
. 2
⊢ (𝐺 ∈ CycGrp ↔ (𝐺 ∈ Grp ∧ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} ≠ ∅)) |
5 | | n0 4277 |
. . . 4
⊢ ({𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} ≠ ∅ ↔ ∃𝑦 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵}) |
6 | | ssrab2 4009 |
. . . . . . . . 9
⊢ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} ⊆ 𝐵 |
7 | | simpr 484 |
. . . . . . . . 9
⊢ ((𝐺 ∈ Grp ∧ 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵}) → 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵}) |
8 | 6, 7 | sselid 3915 |
. . . . . . . 8
⊢ ((𝐺 ∈ Grp ∧ 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵}) → 𝑦 ∈ 𝐵) |
9 | | eqid 2738 |
. . . . . . . . 9
⊢
(od‘𝐺) =
(od‘𝐺) |
10 | 1, 2, 3, 9 | cyggenod2 19400 |
. . . . . . . 8
⊢ ((𝐺 ∈ Grp ∧ 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵}) → ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |
11 | 8, 10 | jca 511 |
. . . . . . 7
⊢ ((𝐺 ∈ Grp ∧ 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵}) → (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) |
12 | 11 | ex 412 |
. . . . . 6
⊢ (𝐺 ∈ Grp → (𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} → (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0)))) |
13 | | cyggex.o |
. . . . . . . . . 10
⊢ 𝐸 = (gEx‘𝐺) |
14 | 1, 13 | gexcl 19100 |
. . . . . . . . 9
⊢ (𝐺 ∈ Grp → 𝐸 ∈
ℕ0) |
15 | 14 | adantr 480 |
. . . . . . . 8
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → 𝐸 ∈
ℕ0) |
16 | | hashcl 13999 |
. . . . . . . . . 10
⊢ (𝐵 ∈ Fin →
(♯‘𝐵) ∈
ℕ0) |
17 | 16 | adantl 481 |
. . . . . . . . 9
⊢ (((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) ∧ 𝐵 ∈ Fin) → (♯‘𝐵) ∈
ℕ0) |
18 | | 0nn0 12178 |
. . . . . . . . . 10
⊢ 0 ∈
ℕ0 |
19 | 18 | a1i 11 |
. . . . . . . . 9
⊢ (((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) ∧ ¬ 𝐵 ∈ Fin) → 0 ∈
ℕ0) |
20 | 17, 19 | ifclda 4491 |
. . . . . . . 8
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → if(𝐵 ∈ Fin,
(♯‘𝐵), 0)
∈ ℕ0) |
21 | | breq2 5074 |
. . . . . . . . 9
⊢
((♯‘𝐵) =
if(𝐵 ∈ Fin,
(♯‘𝐵), 0)
→ (𝐸 ∥
(♯‘𝐵) ↔
𝐸 ∥ if(𝐵 ∈ Fin,
(♯‘𝐵),
0))) |
22 | | breq2 5074 |
. . . . . . . . 9
⊢ (0 =
if(𝐵 ∈ Fin,
(♯‘𝐵), 0)
→ (𝐸 ∥ 0 ↔
𝐸 ∥ if(𝐵 ∈ Fin,
(♯‘𝐵),
0))) |
23 | 1, 13 | gexdvds3 19110 |
. . . . . . . . . 10
⊢ ((𝐺 ∈ Grp ∧ 𝐵 ∈ Fin) → 𝐸 ∥ (♯‘𝐵)) |
24 | 23 | adantlr 711 |
. . . . . . . . 9
⊢ (((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) ∧ 𝐵 ∈ Fin) → 𝐸 ∥ (♯‘𝐵)) |
25 | 15 | adantr 480 |
. . . . . . . . . 10
⊢ (((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) ∧ ¬ 𝐵 ∈ Fin) → 𝐸 ∈
ℕ0) |
26 | | nn0z 12273 |
. . . . . . . . . 10
⊢ (𝐸 ∈ ℕ0
→ 𝐸 ∈
ℤ) |
27 | | dvds0 15909 |
. . . . . . . . . 10
⊢ (𝐸 ∈ ℤ → 𝐸 ∥ 0) |
28 | 25, 26, 27 | 3syl 18 |
. . . . . . . . 9
⊢ (((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) ∧ ¬ 𝐵 ∈ Fin) → 𝐸 ∥ 0) |
29 | 21, 22, 24, 28 | ifbothda 4494 |
. . . . . . . 8
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → 𝐸 ∥ if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |
30 | | simprr 769 |
. . . . . . . . 9
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |
31 | 1, 13, 9 | gexod 19106 |
. . . . . . . . . 10
⊢ ((𝐺 ∈ Grp ∧ 𝑦 ∈ 𝐵) → ((od‘𝐺)‘𝑦) ∥ 𝐸) |
32 | 31 | adantrr 713 |
. . . . . . . . 9
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → ((od‘𝐺)‘𝑦) ∥ 𝐸) |
33 | 30, 32 | eqbrtrrd 5094 |
. . . . . . . 8
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → if(𝐵 ∈ Fin,
(♯‘𝐵), 0)
∥ 𝐸) |
34 | | dvdseq 15951 |
. . . . . . . 8
⊢ (((𝐸 ∈ ℕ0
∧ if(𝐵 ∈ Fin,
(♯‘𝐵), 0)
∈ ℕ0) ∧ (𝐸 ∥ if(𝐵 ∈ Fin, (♯‘𝐵), 0) ∧ if(𝐵 ∈ Fin, (♯‘𝐵), 0) ∥ 𝐸)) → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |
35 | 15, 20, 29, 33, 34 | syl22anc 835 |
. . . . . . 7
⊢ ((𝐺 ∈ Grp ∧ (𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |
36 | 35 | ex 412 |
. . . . . 6
⊢ (𝐺 ∈ Grp → ((𝑦 ∈ 𝐵 ∧ ((od‘𝐺)‘𝑦) = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) |
37 | 12, 36 | syld 47 |
. . . . 5
⊢ (𝐺 ∈ Grp → (𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) |
38 | 37 | exlimdv 1937 |
. . . 4
⊢ (𝐺 ∈ Grp → (∃𝑦 𝑦 ∈ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) |
39 | 5, 38 | syl5bi 241 |
. . 3
⊢ (𝐺 ∈ Grp → ({𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} ≠ ∅ → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0))) |
40 | 39 | imp 406 |
. 2
⊢ ((𝐺 ∈ Grp ∧ {𝑥 ∈ 𝐵 ∣ ran (𝑛 ∈ ℤ ↦ (𝑛(.g‘𝐺)𝑥)) = 𝐵} ≠ ∅) → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |
41 | 4, 40 | sylbi 216 |
1
⊢ (𝐺 ∈ CycGrp → 𝐸 = if(𝐵 ∈ Fin, (♯‘𝐵), 0)) |