| Step |
Hyp |
Ref |
Expression |
| 1 |
|
zzedom.1 |
⊢ abs = ( EuclF ‘ ℤring ) |
| 2 |
|
zringidom |
⊢ ℤring ∈ IDomn |
| 3 |
|
absf |
⊢ abs : ℂ ⟶ ℝ |
| 4 |
3
|
a1i |
⊢ ( ⊤ → abs : ℂ ⟶ ℝ ) |
| 5 |
|
zsscn |
⊢ ℤ ⊆ ℂ |
| 6 |
|
ssdifss |
⊢ ( ℤ ⊆ ℂ → ( ℤ ∖ { 0 } ) ⊆ ℂ ) |
| 7 |
5 6
|
mp1i |
⊢ ( ⊤ → ( ℤ ∖ { 0 } ) ⊆ ℂ ) |
| 8 |
4 7
|
feqresmpt |
⊢ ( ⊤ → ( abs ↾ ( ℤ ∖ { 0 } ) ) = ( 𝑥 ∈ ( ℤ ∖ { 0 } ) ↦ ( abs ‘ 𝑥 ) ) ) |
| 9 |
8
|
mptru |
⊢ ( abs ↾ ( ℤ ∖ { 0 } ) ) = ( 𝑥 ∈ ( ℤ ∖ { 0 } ) ↦ ( abs ‘ 𝑥 ) ) |
| 10 |
|
eldifi |
⊢ ( 𝑥 ∈ ( ℤ ∖ { 0 } ) → 𝑥 ∈ ℤ ) |
| 11 |
|
nn0abscl |
⊢ ( 𝑥 ∈ ℤ → ( abs ‘ 𝑥 ) ∈ ℕ0 ) |
| 12 |
10 11
|
syl |
⊢ ( 𝑥 ∈ ( ℤ ∖ { 0 } ) → ( abs ‘ 𝑥 ) ∈ ℕ0 ) |
| 13 |
9 12
|
fmpti |
⊢ ( abs ↾ ( ℤ ∖ { 0 } ) ) : ( ℤ ∖ { 0 } ) ⟶ ℕ0 |
| 14 |
|
simpr |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) |
| 15 |
|
simp-5r |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑞 ∈ ℤ ) |
| 16 |
15
|
zcnd |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑞 ∈ ℂ ) |
| 17 |
|
difssd |
⊢ ( 𝑥 ∈ ℤ → ( ℤ ∖ { 0 } ) ⊆ ℤ ) |
| 18 |
17
|
sselda |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → 𝑦 ∈ ℤ ) |
| 19 |
18
|
ad5antr |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑦 ∈ ℤ ) |
| 20 |
19
|
zcnd |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑦 ∈ ℂ ) |
| 21 |
16 20
|
mulcomd |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → ( 𝑞 · 𝑦 ) = ( 𝑦 · 𝑞 ) ) |
| 22 |
21
|
oveq1d |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → ( ( 𝑞 · 𝑦 ) + 𝑟 ) = ( ( 𝑦 · 𝑞 ) + 𝑟 ) ) |
| 23 |
14 22
|
eqtrd |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑥 = ( ( 𝑦 · 𝑞 ) + 𝑟 ) ) |
| 24 |
|
df-ne |
⊢ ( 𝑟 ≠ 0 ↔ ¬ 𝑟 = 0 ) |
| 25 |
|
simpllr |
⊢ ( ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ∧ 𝑟 ≠ 0 ) → 𝑟 < ( abs ‘ 𝑦 ) ) |
| 26 |
|
simp-4r |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑟 ∈ ℤ ) |
| 27 |
26
|
adantr |
⊢ ( ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ∧ 𝑟 ≠ 0 ) → 𝑟 ∈ ℤ ) |
| 28 |
|
simpr |
⊢ ( ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ∧ 𝑟 ≠ 0 ) → 𝑟 ≠ 0 ) |
| 29 |
27 28
|
eldifsnd |
⊢ ( ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ∧ 𝑟 ≠ 0 ) → 𝑟 ∈ ( ℤ ∖ { 0 } ) ) |
| 30 |
29
|
fvresd |
⊢ ( ( ( ( ( ( ( ( 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 ) ) |
| 31 |
26
|
zred |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 𝑟 ∈ ℝ ) |
| 32 |
|
simpllr |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → 0 ≤ 𝑟 ) |
| 33 |
31 32
|
absidd |
⊢ ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) → ( abs ‘ 𝑟 ) = 𝑟 ) |
| 34 |
33
|
adantr |
⊢ ( ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ∧ 𝑟 ≠ 0 ) → ( abs ‘ 𝑟 ) = 𝑟 ) |
| 35 |
30 34
|
eqtrd |
⊢ ( ( ( ( ( ( ( ( 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 ) |
| 36 |
|
simp-7r |
⊢ ( ( ( ( ( ( ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) ∧ 𝑞 ∈ ℤ ) ∧ 𝑟 ∈ ℤ ) ∧ 0 ≤ 𝑟 ) ∧ 𝑟 < ( abs ‘ 𝑦 ) ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ∧ 𝑟 ≠ 0 ) → 𝑦 ∈ ( ℤ ∖ { 0 } ) ) |
| 37 |
36
|
fvresd |
⊢ ( ( ( ( ( ( ( ( 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 ) ) |
| 38 |
25 35 37
|
3brtr4d |
⊢ ( ( ( ( ( ( ( ( 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 |
38
|
ex |
⊢ ( ( ( ( ( ( ( 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 |
24 39
|
biimtrrid |
⊢ ( ( ( ( ( ( ( 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 |
40
|
orrd |
⊢ ( ( ( ( ( ( ( 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 ) ) ) |
| 42 |
23 41
|
jca |
⊢ ( ( ( ( ( ( ( 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 |
42
|
3anasss |
⊢ ( ( ( ( ( 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 ) ) ) ) |
| 44 |
|
simpl |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → 𝑥 ∈ ℤ ) |
| 45 |
|
simpr |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → 𝑦 ∈ ( ℤ ∖ { 0 } ) ) |
| 46 |
45
|
eldifsnbd |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → 𝑦 ≠ 0 ) |
| 47 |
|
divalg |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 𝑦 ≠ 0 ) → ∃! 𝑟 ∈ ℤ ∃ 𝑞 ∈ ℤ ( 0 ≤ 𝑟 ∧ 𝑟 < ( abs ‘ 𝑦 ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ) |
| 48 |
|
reurex |
⊢ ( ∃! 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 ) ) ) |
| 49 |
47 48
|
syl |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ 𝑦 ≠ 0 ) → ∃ 𝑟 ∈ ℤ ∃ 𝑞 ∈ ℤ ( 0 ≤ 𝑟 ∧ 𝑟 < ( abs ‘ 𝑦 ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ) |
| 50 |
44 18 46 49
|
syl3anc |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → ∃ 𝑟 ∈ ℤ ∃ 𝑞 ∈ ℤ ( 0 ≤ 𝑟 ∧ 𝑟 < ( abs ‘ 𝑦 ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ) |
| 51 |
|
rexcom |
⊢ ( ∃ 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 ) ) ) |
| 52 |
50 51
|
sylib |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → ∃ 𝑞 ∈ ℤ ∃ 𝑟 ∈ ℤ ( 0 ≤ 𝑟 ∧ 𝑟 < ( abs ‘ 𝑦 ) ∧ 𝑥 = ( ( 𝑞 · 𝑦 ) + 𝑟 ) ) ) |
| 53 |
43 52
|
reximddv2 |
⊢ ( ( 𝑥 ∈ ℤ ∧ 𝑦 ∈ ( ℤ ∖ { 0 } ) ) → ∃ 𝑞 ∈ ℤ ∃ 𝑟 ∈ ℤ ( 𝑥 = ( ( 𝑦 · 𝑞 ) + 𝑟 ) ∧ ( 𝑟 = 0 ∨ ( ( abs ↾ ( ℤ ∖ { 0 } ) ) ‘ 𝑟 ) < ( ( abs ↾ ( ℤ ∖ { 0 } ) ) ‘ 𝑦 ) ) ) ) |
| 54 |
53
|
rgen2 |
⊢ ∀ 𝑥 ∈ ℤ ∀ 𝑦 ∈ ( ℤ ∖ { 0 } ) ∃ 𝑞 ∈ ℤ ∃ 𝑟 ∈ ℤ ( 𝑥 = ( ( 𝑦 · 𝑞 ) + 𝑟 ) ∧ ( 𝑟 = 0 ∨ ( ( abs ↾ ( ℤ ∖ { 0 } ) ) ‘ 𝑟 ) < ( ( abs ↾ ( ℤ ∖ { 0 } ) ) ‘ 𝑦 ) ) ) |
| 55 |
13 54
|
pm3.2i |
⊢ ( ( 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 ) ) ) ) |
| 56 |
|
zringbas |
⊢ ℤ = ( Base ‘ ℤring ) |
| 57 |
|
zring0 |
⊢ 0 = ( 0g ‘ ℤring ) |
| 58 |
|
zringplusg |
⊢ + = ( +g ‘ ℤring ) |
| 59 |
|
zringmulr |
⊢ · = ( .r ‘ ℤring ) |
| 60 |
1
|
reseq1i |
⊢ ( abs ↾ ( ℤ ∖ { 0 } ) ) = ( ( EuclF ‘ ℤring ) ↾ ( ℤ ∖ { 0 } ) ) |
| 61 |
56 57 58 59 60
|
isedom |
⊢ ( 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 |
2 55 61
|
mpbir2an |
⊢ ℤring ∈ EDomn |