| Step | Hyp | Ref
| Expression |
| 1 | | zringidom 33938 |
. 2
⊢
ℤring ∈ IDomn |
| 2 | | absf 15537 |
. . . . . . 7
⊢
abs:ℂ⟶ℝ |
| 3 | 2 | a1i 11 |
. . . . . 6
⊢ (⊤
→ abs:ℂ⟶ℝ) |
| 4 | | zsscn 12731 |
. . . . . . 7
⊢ ℤ
⊆ ℂ |
| 5 | | ssdifss 4079 |
. . . . . . 7
⊢ (ℤ
⊆ ℂ → (ℤ ∖ {0}) ⊆ ℂ) |
| 6 | 4, 5 | mp1i 14 |
. . . . . 6
⊢ (⊤
→ (ℤ ∖ {0}) ⊆ ℂ) |
| 7 | 3, 6 | feqresmpt 6980 |
. . . . 5
⊢ (⊤
→ (abs ↾ (ℤ ∖ {0})) = (𝑥 ∈ (ℤ ∖ {0}) ↦
(abs‘𝑥))) |
| 8 | 7 | mptru 1577 |
. . . 4
⊢ (abs
↾ (ℤ ∖ {0})) = (𝑥 ∈ (ℤ ∖ {0}) ↦
(abs‘𝑥)) |
| 9 | | eldifi 4070 |
. . . . 5
⊢ (𝑥 ∈ (ℤ ∖ {0})
→ 𝑥 ∈
ℤ) |
| 10 | | nn0abscl 15511 |
. . . . 5
⊢ (𝑥 ∈ ℤ →
(abs‘𝑥) ∈
ℕ0) |
| 11 | 9, 10 | syl 18 |
. . . 4
⊢ (𝑥 ∈ (ℤ ∖ {0})
→ (abs‘𝑥) ∈
ℕ0) |
| 12 | 8, 11 | fmpti 7139 |
. . 3
⊢ (abs
↾ (ℤ ∖ {0})):(ℤ ∖
{0})⟶ℕ0 |
| 13 | | simpr 490 |
. . . . . . . 8
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑥 = ((𝑞 · 𝑦) + 𝑟)) |
| 14 | | simp-5r 798 |
. . . . . . . . . . 11
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑞 ∈ ℤ) |
| 15 | 14 | zcnd 12834 |
. . . . . . . . . 10
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑞 ∈ ℂ) |
| 16 | | difssd 4076 |
. . . . . . . . . . . . 13
⊢ (𝑥 ∈ ℤ → (ℤ
∖ {0}) ⊆ ℤ) |
| 17 | 16 | sselda 3913 |
. . . . . . . . . . . 12
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ 𝑦 ∈
ℤ) |
| 18 | 17 | ad5antr 747 |
. . . . . . . . . . 11
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑦 ∈ ℤ) |
| 19 | 18 | zcnd 12834 |
. . . . . . . . . 10
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑦 ∈ ℂ) |
| 20 | 15, 19 | mulcomd 11360 |
. . . . . . . . 9
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → (𝑞 · 𝑦) = (𝑦 · 𝑞)) |
| 21 | 20 | oveq1d 7461 |
. . . . . . . 8
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → ((𝑞 · 𝑦) + 𝑟) = ((𝑦 · 𝑞) + 𝑟)) |
| 22 | 13, 21 | eqtrd 2798 |
. . . . . . 7
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑥 = ((𝑦 · 𝑞) + 𝑟)) |
| 23 | | df-ne 2960 |
. . . . . . . . 9
⊢ (𝑟 ≠ 0 ↔ ¬ 𝑟 = 0) |
| 24 | | simpllr 788 |
. . . . . . . . . . 11
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → 𝑟 < (abs‘𝑦)) |
| 25 | | simp-4r 796 |
. . . . . . . . . . . . . . 15
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑟 ∈ ℤ) |
| 26 | 25 | adantr 486 |
. . . . . . . . . . . . . 14
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → 𝑟 ∈ ℤ) |
| 27 | | simpr 490 |
. . . . . . . . . . . . . 14
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → 𝑟 ≠ 0) |
| 28 | 26, 27 | eldifsnd 4750 |
. . . . . . . . . . . . 13
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → 𝑟 ∈ (ℤ ∖
{0})) |
| 29 | 28 | fvresd 6931 |
. . . . . . . . . . . 12
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → ((abs ↾ (ℤ
∖ {0}))‘𝑟) =
(abs‘𝑟)) |
| 30 | 25 | zred 12833 |
. . . . . . . . . . . . . 14
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 𝑟 ∈ ℝ) |
| 31 | | simpllr 788 |
. . . . . . . . . . . . . 14
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → 0 ≤ 𝑟) |
| 32 | 30, 31 | absidd 15622 |
. . . . . . . . . . . . 13
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → (abs‘𝑟) = 𝑟) |
| 33 | 32 | adantr 486 |
. . . . . . . . . . . 12
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → (abs‘𝑟) = 𝑟) |
| 34 | 29, 33 | eqtrd 2798 |
. . . . . . . . . . 11
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → ((abs ↾ (ℤ
∖ {0}))‘𝑟) =
𝑟) |
| 35 | | simp-7r 802 |
. . . . . . . . . . . 12
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → 𝑦 ∈ (ℤ ∖
{0})) |
| 36 | 35 | fvresd 6931 |
. . . . . . . . . . 11
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → ((abs ↾ (ℤ
∖ {0}))‘𝑦) =
(abs‘𝑦)) |
| 37 | 24, 34, 36 | 3brtr4d 5141 |
. . . . . . . . . 10
⊢
((((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ∧ 𝑟 ≠ 0) → ((abs ↾ (ℤ
∖ {0}))‘𝑟) <
((abs ↾ (ℤ ∖ {0}))‘𝑦)) |
| 38 | 37 | ex 418 |
. . . . . . . . 9
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → (𝑟 ≠ 0 → ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦))) |
| 39 | 23, 38 | biimtrrid 246 |
. . . . . . . 8
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → (¬ 𝑟 = 0 → ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦))) |
| 40 | 39 | orrd 877 |
. . . . . . 7
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦))) |
| 41 | 22, 40 | jca 521 |
. . . . . 6
⊢
(((((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ 0 ≤ 𝑟) ∧ 𝑟 < (abs‘𝑦)) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → (𝑥 = ((𝑦 · 𝑞) + 𝑟) ∧ (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦)))) |
| 42 | 41 | 3anasss 1381 |
. . . . 5
⊢
(((((𝑥 ∈
ℤ ∧ 𝑦 ∈
(ℤ ∖ {0})) ∧ 𝑞 ∈ ℤ) ∧ 𝑟 ∈ ℤ) ∧ (0 ≤ 𝑟 ∧ 𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) → (𝑥 = ((𝑦 · 𝑞) + 𝑟) ∧ (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦)))) |
| 43 | | simpl 488 |
. . . . . . 7
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ 𝑥 ∈
ℤ) |
| 44 | | simpr 490 |
. . . . . . . 8
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ 𝑦 ∈ (ℤ
∖ {0})) |
| 45 | 44 | eldifsnbd 4749 |
. . . . . . 7
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ 𝑦 ≠
0) |
| 46 | | divalg 16605 |
. . . . . . . 8
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 𝑦 ≠ 0) → ∃!𝑟 ∈ ℤ ∃𝑞 ∈ ℤ (0 ≤ 𝑟 ∧ 𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) |
| 47 | | reurex 3373 |
. . . . . . . 8
⊢
(∃!𝑟 ∈
ℤ ∃𝑞 ∈
ℤ (0 ≤ 𝑟 ∧
𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) → ∃𝑟 ∈ ℤ ∃𝑞 ∈ ℤ (0 ≤ 𝑟 ∧ 𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) |
| 48 | 46, 47 | syl 18 |
. . . . . . 7
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 𝑦 ≠ 0) → ∃𝑟 ∈ ℤ ∃𝑞 ∈ ℤ (0 ≤ 𝑟 ∧ 𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) |
| 49 | 43, 17, 45, 48 | syl3anc 1399 |
. . . . . 6
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ ∃𝑟 ∈
ℤ ∃𝑞 ∈
ℤ (0 ≤ 𝑟 ∧
𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) |
| 50 | | rexcom 3295 |
. . . . . 6
⊢
(∃𝑟 ∈
ℤ ∃𝑞 ∈
ℤ (0 ≤ 𝑟 ∧
𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟)) ↔ ∃𝑞 ∈ ℤ ∃𝑟 ∈ ℤ (0 ≤ 𝑟 ∧ 𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) |
| 51 | 49, 50 | sylib 221 |
. . . . 5
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ ∃𝑞 ∈
ℤ ∃𝑟 ∈
ℤ (0 ≤ 𝑟 ∧
𝑟 < (abs‘𝑦) ∧ 𝑥 = ((𝑞 · 𝑦) + 𝑟))) |
| 52 | 42, 51 | reximddv2 3225 |
. . . 4
⊢ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ (ℤ ∖ {0}))
→ ∃𝑞 ∈
ℤ ∃𝑟 ∈
ℤ (𝑥 = ((𝑦 · 𝑞) + 𝑟) ∧ (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦)))) |
| 53 | 52 | rgen2 3206 |
. . 3
⊢
∀𝑥 ∈
ℤ ∀𝑦 ∈
(ℤ ∖ {0})∃𝑞 ∈ ℤ ∃𝑟 ∈ ℤ (𝑥 = ((𝑦 · 𝑞) + 𝑟) ∧ (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦))) |
| 54 | 12, 53 | pm3.2i 476 |
. 2
⊢ ((abs
↾ (ℤ ∖ {0})):(ℤ ∖ {0})⟶ℕ0
∧ ∀𝑥 ∈
ℤ ∀𝑦 ∈
(ℤ ∖ {0})∃𝑞 ∈ ℤ ∃𝑟 ∈ ℤ (𝑥 = ((𝑦 · 𝑞) + 𝑟) ∧ (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦)))) |
| 55 | | zringbas 21792 |
. . 3
⊢ ℤ =
(Base‘ℤring) |
| 56 | | zring0 21797 |
. . 3
⊢ 0 =
(0g‘ℤring) |
| 57 | | zringplusg 21793 |
. . 3
⊢ + =
(+g‘ℤring) |
| 58 | | zringmulr 21796 |
. . 3
⊢ ·
= (.r‘ℤring) |
| 59 | | zzedom.1 |
. . . 4
⊢ abs =
(EuclF‘ℤring) |
| 60 | 59 | reseq1i 5978 |
. . 3
⊢ (abs
↾ (ℤ ∖ {0})) = ((EuclF‘ℤring) ↾
(ℤ ∖ {0})) |
| 61 | 55, 56, 57, 58, 60 | isedom 33934 |
. 2
⊢
(ℤring ∈ EDomn ↔ (ℤring
∈ IDomn ∧ ((abs ↾ (ℤ ∖ {0})):(ℤ ∖
{0})⟶ℕ0 ∧ ∀𝑥 ∈ ℤ ∀𝑦 ∈ (ℤ ∖ {0})∃𝑞 ∈ ℤ ∃𝑟 ∈ ℤ (𝑥 = ((𝑦 · 𝑞) + 𝑟) ∧ (𝑟 = 0 ∨ ((abs ↾ (ℤ ∖
{0}))‘𝑟) < ((abs
↾ (ℤ ∖ {0}))‘𝑦)))))) |
| 62 | 1, 54, 61 | mpbir2an 724 |
1
⊢
ℤring ∈ EDomn |