| Step | Hyp | Ref | Expression | 
|---|
| 1 |  | oveq1 7439 | . . . . . . . 8
⊢ (𝑥 = 𝐵 → (𝑥 /L 𝑁) = (𝐵 /L 𝑁)) | 
| 2 | 1 | oveq1d 7447 | . . . . . . 7
⊢ (𝑥 = 𝐵 → ((𝑥 /L 𝑁) · (0 /L 𝑁)) = ((𝐵 /L 𝑁) · (0 /L 𝑁))) | 
| 3 | 2 | eqeq2d 2747 | . . . . . 6
⊢ (𝑥 = 𝐵 → ((0 /L 𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁)) ↔ (0
/L 𝑁) =
((𝐵 /L
𝑁) · (0
/L 𝑁)))) | 
| 4 |  | id 22 | . . . . . . . . . . . . . 14
⊢ (𝑥 ∈ ℤ → 𝑥 ∈
ℤ) | 
| 5 |  | nn0z 12640 | . . . . . . . . . . . . . 14
⊢ (𝑁 ∈ ℕ0
→ 𝑁 ∈
ℤ) | 
| 6 |  | lgscl 27356 | . . . . . . . . . . . . . 14
⊢ ((𝑥 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑥 /L 𝑁) ∈
ℤ) | 
| 7 | 4, 5, 6 | syl2anr 597 | . . . . . . . . . . . . 13
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (𝑥
/L 𝑁)
∈ ℤ) | 
| 8 | 7 | zcnd 12725 | . . . . . . . . . . . 12
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (𝑥
/L 𝑁)
∈ ℂ) | 
| 9 | 8 | adantr 480 | . . . . . . . . . . 11
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) = 0) → (𝑥 /L 𝑁) ∈ ℂ) | 
| 10 | 9 | mul01d 11461 | . . . . . . . . . 10
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) = 0) → ((𝑥 /L 𝑁) · 0) = 0) | 
| 11 |  | simpr 484 | . . . . . . . . . . 11
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) = 0) → (0 /L 𝑁) = 0) | 
| 12 | 11 | oveq2d 7448 | . . . . . . . . . 10
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) = 0) → ((𝑥 /L 𝑁) · (0 /L 𝑁)) = ((𝑥 /L 𝑁) · 0)) | 
| 13 | 10, 12, 11 | 3eqtr4rd 2787 | . . . . . . . . 9
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) = 0) → (0 /L 𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁))) | 
| 14 |  | 0z 12626 | . . . . . . . . . . . . . 14
⊢ 0 ∈
ℤ | 
| 15 | 5 | adantr 480 | . . . . . . . . . . . . . 14
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ 𝑁 ∈
ℤ) | 
| 16 |  | lgsne0 27380 | . . . . . . . . . . . . . 14
⊢ ((0
∈ ℤ ∧ 𝑁
∈ ℤ) → ((0 /L 𝑁) ≠ 0 ↔ (0 gcd 𝑁) = 1)) | 
| 17 | 14, 15, 16 | sylancr 587 | . . . . . . . . . . . . 13
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ ((0 /L 𝑁) ≠ 0 ↔ (0 gcd 𝑁) = 1)) | 
| 18 |  | gcdcom 16551 | . . . . . . . . . . . . . . . . 17
⊢ ((0
∈ ℤ ∧ 𝑁
∈ ℤ) → (0 gcd 𝑁) = (𝑁 gcd 0)) | 
| 19 | 14, 15, 18 | sylancr 587 | . . . . . . . . . . . . . . . 16
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (0 gcd 𝑁) = (𝑁 gcd 0)) | 
| 20 |  | nn0gcdid0 16559 | . . . . . . . . . . . . . . . . 17
⊢ (𝑁 ∈ ℕ0
→ (𝑁 gcd 0) = 𝑁) | 
| 21 | 20 | adantr 480 | . . . . . . . . . . . . . . . 16
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (𝑁 gcd 0) = 𝑁) | 
| 22 | 19, 21 | eqtrd 2776 | . . . . . . . . . . . . . . 15
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (0 gcd 𝑁) = 𝑁) | 
| 23 | 22 | eqeq1d 2738 | . . . . . . . . . . . . . 14
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ ((0 gcd 𝑁) = 1
↔ 𝑁 =
1)) | 
| 24 |  | lgs1 27386 | . . . . . . . . . . . . . . . 16
⊢ (𝑥 ∈ ℤ → (𝑥 /L 1) =
1) | 
| 25 | 24 | adantl 481 | . . . . . . . . . . . . . . 15
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (𝑥
/L 1) = 1) | 
| 26 |  | oveq2 7440 | . . . . . . . . . . . . . . . 16
⊢ (𝑁 = 1 → (𝑥 /L 𝑁) = (𝑥 /L 1)) | 
| 27 | 26 | eqeq1d 2738 | . . . . . . . . . . . . . . 15
⊢ (𝑁 = 1 → ((𝑥 /L 𝑁) = 1 ↔ (𝑥 /L 1) =
1)) | 
| 28 | 25, 27 | syl5ibrcom 247 | . . . . . . . . . . . . . 14
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (𝑁 = 1 → (𝑥 /L 𝑁) = 1)) | 
| 29 | 23, 28 | sylbid 240 | . . . . . . . . . . . . 13
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ ((0 gcd 𝑁) = 1
→ (𝑥
/L 𝑁) =
1)) | 
| 30 | 17, 29 | sylbid 240 | . . . . . . . . . . . 12
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ ((0 /L 𝑁) ≠ 0 → (𝑥 /L 𝑁) = 1)) | 
| 31 | 30 | imp 406 | . . . . . . . . . . 11
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → (𝑥 /L 𝑁) = 1) | 
| 32 | 31 | oveq1d 7447 | . . . . . . . . . 10
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → ((𝑥 /L 𝑁) · (0 /L 𝑁)) = (1 · (0
/L 𝑁))) | 
| 33 | 5 | ad2antrr 726 | . . . . . . . . . . . . 13
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → 𝑁 ∈ ℤ) | 
| 34 |  | lgscl 27356 | . . . . . . . . . . . . 13
⊢ ((0
∈ ℤ ∧ 𝑁
∈ ℤ) → (0 /L 𝑁) ∈ ℤ) | 
| 35 | 14, 33, 34 | sylancr 587 | . . . . . . . . . . . 12
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → (0 /L
𝑁) ∈
ℤ) | 
| 36 | 35 | zcnd 12725 | . . . . . . . . . . 11
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → (0 /L
𝑁) ∈
ℂ) | 
| 37 | 36 | mullidd 11280 | . . . . . . . . . 10
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → (1 · (0
/L 𝑁)) =
(0 /L 𝑁)) | 
| 38 | 32, 37 | eqtr2d 2777 | . . . . . . . . 9
⊢ (((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
∧ (0 /L 𝑁) ≠ 0) → (0 /L
𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁))) | 
| 39 | 13, 38 | pm2.61dane 3028 | . . . . . . . 8
⊢ ((𝑁 ∈ ℕ0
∧ 𝑥 ∈ ℤ)
→ (0 /L 𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁))) | 
| 40 | 39 | ralrimiva 3145 | . . . . . . 7
⊢ (𝑁 ∈ ℕ0
→ ∀𝑥 ∈
ℤ (0 /L 𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁))) | 
| 41 | 40 | 3ad2ant3 1135 | . . . . . 6
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ ∀𝑥 ∈
ℤ (0 /L 𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁))) | 
| 42 |  | simp2 1137 | . . . . . 6
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ 𝐵 ∈
ℤ) | 
| 43 | 3, 41, 42 | rspcdva 3622 | . . . . 5
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (0 /L 𝑁) = ((𝐵 /L 𝑁) · (0 /L 𝑁))) | 
| 44 | 43 | adantr 480 | . . . 4
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → (0
/L 𝑁) =
((𝐵 /L
𝑁) · (0
/L 𝑁))) | 
| 45 | 5 | 3ad2ant3 1135 | . . . . . . . 8
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ 𝑁 ∈
ℤ) | 
| 46 | 14, 45, 34 | sylancr 587 | . . . . . . 7
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (0 /L 𝑁) ∈ ℤ) | 
| 47 | 46 | zcnd 12725 | . . . . . 6
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (0 /L 𝑁) ∈ ℂ) | 
| 48 | 47 | adantr 480 | . . . . 5
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → (0
/L 𝑁)
∈ ℂ) | 
| 49 |  | lgscl 27356 | . . . . . . . 8
⊢ ((𝐵 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐵 /L 𝑁) ∈
ℤ) | 
| 50 | 42, 45, 49 | syl2anc 584 | . . . . . . 7
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (𝐵
/L 𝑁)
∈ ℤ) | 
| 51 | 50 | zcnd 12725 | . . . . . 6
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (𝐵
/L 𝑁)
∈ ℂ) | 
| 52 | 51 | adantr 480 | . . . . 5
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → (𝐵 /L 𝑁) ∈
ℂ) | 
| 53 | 48, 52 | mulcomd 11283 | . . . 4
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → ((0
/L 𝑁)
· (𝐵
/L 𝑁)) =
((𝐵 /L
𝑁) · (0
/L 𝑁))) | 
| 54 | 44, 53 | eqtr4d 2779 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → (0
/L 𝑁) =
((0 /L 𝑁)
· (𝐵
/L 𝑁))) | 
| 55 |  | oveq1 7439 | . . . . 5
⊢ (𝐴 = 0 → (𝐴 · 𝐵) = (0 · 𝐵)) | 
| 56 |  | zcn 12620 | . . . . . . 7
⊢ (𝐵 ∈ ℤ → 𝐵 ∈
ℂ) | 
| 57 | 56 | 3ad2ant2 1134 | . . . . . 6
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ 𝐵 ∈
ℂ) | 
| 58 | 57 | mul02d 11460 | . . . . 5
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (0 · 𝐵) =
0) | 
| 59 | 55, 58 | sylan9eqr 2798 | . . . 4
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → (𝐴 · 𝐵) = 0) | 
| 60 | 59 | oveq1d 7447 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → ((𝐴 · 𝐵) /L 𝑁) = (0 /L 𝑁)) | 
| 61 |  | simpr 484 | . . . . 5
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → 𝐴 = 0) | 
| 62 | 61 | oveq1d 7447 | . . . 4
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → (𝐴 /L 𝑁) = (0 /L
𝑁)) | 
| 63 | 62 | oveq1d 7447 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → ((𝐴 /L 𝑁) · (𝐵 /L 𝑁)) = ((0 /L 𝑁) · (𝐵 /L 𝑁))) | 
| 64 | 54, 60, 63 | 3eqtr4d 2786 | . 2
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐴 = 0) → ((𝐴 · 𝐵) /L 𝑁) = ((𝐴 /L 𝑁) · (𝐵 /L 𝑁))) | 
| 65 |  | oveq1 7439 | . . . . . . 7
⊢ (𝑥 = 𝐴 → (𝑥 /L 𝑁) = (𝐴 /L 𝑁)) | 
| 66 | 65 | oveq1d 7447 | . . . . . 6
⊢ (𝑥 = 𝐴 → ((𝑥 /L 𝑁) · (0 /L 𝑁)) = ((𝐴 /L 𝑁) · (0 /L 𝑁))) | 
| 67 | 66 | eqeq2d 2747 | . . . . 5
⊢ (𝑥 = 𝐴 → ((0 /L 𝑁) = ((𝑥 /L 𝑁) · (0 /L 𝑁)) ↔ (0
/L 𝑁) =
((𝐴 /L
𝑁) · (0
/L 𝑁)))) | 
| 68 |  | simp1 1136 | . . . . 5
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ 𝐴 ∈
ℤ) | 
| 69 | 67, 41, 68 | rspcdva 3622 | . . . 4
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (0 /L 𝑁) = ((𝐴 /L 𝑁) · (0 /L 𝑁))) | 
| 70 | 69 | adantr 480 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → (0
/L 𝑁) =
((𝐴 /L
𝑁) · (0
/L 𝑁))) | 
| 71 |  | oveq2 7440 | . . . . 5
⊢ (𝐵 = 0 → (𝐴 · 𝐵) = (𝐴 · 0)) | 
| 72 | 68 | zcnd 12725 | . . . . . 6
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ 𝐴 ∈
ℂ) | 
| 73 | 72 | mul01d 11461 | . . . . 5
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ (𝐴 · 0) =
0) | 
| 74 | 71, 73 | sylan9eqr 2798 | . . . 4
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → (𝐴 · 𝐵) = 0) | 
| 75 | 74 | oveq1d 7447 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → ((𝐴 · 𝐵) /L 𝑁) = (0 /L 𝑁)) | 
| 76 |  | simpr 484 | . . . . 5
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → 𝐵 = 0) | 
| 77 | 76 | oveq1d 7447 | . . . 4
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → (𝐵 /L 𝑁) = (0 /L
𝑁)) | 
| 78 | 77 | oveq2d 7448 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → ((𝐴 /L 𝑁) · (𝐵 /L 𝑁)) = ((𝐴 /L 𝑁) · (0 /L 𝑁))) | 
| 79 | 70, 75, 78 | 3eqtr4d 2786 | . 2
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ 𝐵 = 0) → ((𝐴 · 𝐵) /L 𝑁) = ((𝐴 /L 𝑁) · (𝐵 /L 𝑁))) | 
| 80 |  | lgsdir 27377 | . . 3
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐴 ≠ 0 ∧ 𝐵 ≠ 0)) → ((𝐴 · 𝐵) /L 𝑁) = ((𝐴 /L 𝑁) · (𝐵 /L 𝑁))) | 
| 81 | 5, 80 | syl3anl3 1415 | . 2
⊢ (((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
∧ (𝐴 ≠ 0 ∧ 𝐵 ≠ 0)) → ((𝐴 · 𝐵) /L 𝑁) = ((𝐴 /L 𝑁) · (𝐵 /L 𝑁))) | 
| 82 | 64, 79, 81 | pm2.61da2ne 3029 | 1
⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ ∧ 𝑁 ∈ ℕ0)
→ ((𝐴 · 𝐵) /L 𝑁) = ((𝐴 /L 𝑁) · (𝐵 /L 𝑁))) |