Proof of Theorem nprmdvdsfacm1lem2
| Step | Hyp | Ref
| Expression |
| 1 | | eluz2 12783 |
. . 3
⊢ (𝑁 ∈
(ℤ≥‘6) ↔ (6 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 6 ≤
𝑁)) |
| 2 | | breq2 5090 |
. . . . . . . 8
⊢ (𝑁 = (𝐴↑2) → (6 ≤ 𝑁 ↔ 6 ≤ (𝐴↑2))) |
| 3 | 2 | adantr 480 |
. . . . . . 7
⊢ ((𝑁 = (𝐴↑2) ∧ 𝐴 ∈ (2..^𝑁)) → (6 ≤ 𝑁 ↔ 6 ≤ (𝐴↑2))) |
| 4 | | elfzo2 13605 |
. . . . . . . . 9
⊢ (𝐴 ∈ (2..^𝑁) ↔ (𝐴 ∈ (ℤ≥‘2)
∧ 𝑁 ∈ ℤ
∧ 𝐴 < 𝑁)) |
| 5 | | eluz2 12783 |
. . . . . . . . . . 11
⊢ (𝐴 ∈
(ℤ≥‘2) ↔ (2 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 2 ≤
𝐴)) |
| 6 | | 2re 12244 |
. . . . . . . . . . . . . . . 16
⊢ 2 ∈
ℝ |
| 7 | 6 | a1i 11 |
. . . . . . . . . . . . . . 15
⊢ (𝐴 ∈ ℤ → 2 ∈
ℝ) |
| 8 | | zre 12517 |
. . . . . . . . . . . . . . 15
⊢ (𝐴 ∈ ℤ → 𝐴 ∈
ℝ) |
| 9 | 7, 8 | leloed 11278 |
. . . . . . . . . . . . . 14
⊢ (𝐴 ∈ ℤ → (2 ≤
𝐴 ↔ (2 < 𝐴 ∨ 2 = 𝐴))) |
| 10 | | df-3 12234 |
. . . . . . . . . . . . . . . . . 18
⊢ 3 = (2 +
1) |
| 11 | | 2z 12548 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ 2 ∈
ℤ |
| 12 | 11 | a1i 11 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝐴 ∈ ℤ → 2 ∈
ℤ) |
| 13 | | id 22 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝐴 ∈ ℤ → 𝐴 ∈
ℤ) |
| 14 | 12, 13 | zltp1led 12571 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝐴 ∈ ℤ → (2 <
𝐴 ↔ (2 + 1) ≤ 𝐴)) |
| 15 | 14 | biimpa 476 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝐴 ∈ ℤ ∧ 2 <
𝐴) → (2 + 1) ≤
𝐴) |
| 16 | 10, 15 | eqbrtrid 5121 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝐴 ∈ ℤ ∧ 2 <
𝐴) → 3 ≤ 𝐴) |
| 17 | 16 | a1d 25 |
. . . . . . . . . . . . . . . 16
⊢ ((𝐴 ∈ ℤ ∧ 2 <
𝐴) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 18 | 17 | ex 412 |
. . . . . . . . . . . . . . 15
⊢ (𝐴 ∈ ℤ → (2 <
𝐴 → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴))) |
| 19 | | oveq1 7365 |
. . . . . . . . . . . . . . . . . 18
⊢ (2 =
𝐴 → (2↑2) =
(𝐴↑2)) |
| 20 | 19 | breq2d 5098 |
. . . . . . . . . . . . . . . . 17
⊢ (2 =
𝐴 → (6 ≤ (2↑2)
↔ 6 ≤ (𝐴↑2))) |
| 21 | | sq2 14148 |
. . . . . . . . . . . . . . . . . . 19
⊢
(2↑2) = 4 |
| 22 | 21 | breq2i 5094 |
. . . . . . . . . . . . . . . . . 18
⊢ (6 ≤
(2↑2) ↔ 6 ≤ 4) |
| 23 | | 4lt6 12347 |
. . . . . . . . . . . . . . . . . . . 20
⊢ 4 <
6 |
| 24 | | 4re 12254 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ 4 ∈
ℝ |
| 25 | | 6re 12260 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ 6 ∈
ℝ |
| 26 | 24, 25 | ltnlei 11256 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (4 < 6
↔ ¬ 6 ≤ 4) |
| 27 | 23, 26 | mpbi 230 |
. . . . . . . . . . . . . . . . . . 19
⊢ ¬ 6
≤ 4 |
| 28 | 27 | pm2.21i 119 |
. . . . . . . . . . . . . . . . . 18
⊢ (6 ≤ 4
→ 3 ≤ 𝐴) |
| 29 | 22, 28 | sylbi 217 |
. . . . . . . . . . . . . . . . 17
⊢ (6 ≤
(2↑2) → 3 ≤ 𝐴) |
| 30 | 20, 29 | biimtrrdi 254 |
. . . . . . . . . . . . . . . 16
⊢ (2 =
𝐴 → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 31 | 30 | a1i 11 |
. . . . . . . . . . . . . . 15
⊢ (𝐴 ∈ ℤ → (2 =
𝐴 → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴))) |
| 32 | 18, 31 | jaod 860 |
. . . . . . . . . . . . . 14
⊢ (𝐴 ∈ ℤ → ((2 <
𝐴 ∨ 2 = 𝐴) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴))) |
| 33 | 9, 32 | sylbid 240 |
. . . . . . . . . . . . 13
⊢ (𝐴 ∈ ℤ → (2 ≤
𝐴 → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴))) |
| 34 | 33 | a1i 11 |
. . . . . . . . . . . 12
⊢ (2 ∈
ℤ → (𝐴 ∈
ℤ → (2 ≤ 𝐴
→ (6 ≤ (𝐴↑2)
→ 3 ≤ 𝐴)))) |
| 35 | 34 | 3imp 1111 |
. . . . . . . . . . 11
⊢ ((2
∈ ℤ ∧ 𝐴
∈ ℤ ∧ 2 ≤ 𝐴) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 36 | 5, 35 | sylbi 217 |
. . . . . . . . . 10
⊢ (𝐴 ∈
(ℤ≥‘2) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 37 | 36 | 3ad2ant1 1134 |
. . . . . . . . 9
⊢ ((𝐴 ∈
(ℤ≥‘2) ∧ 𝑁 ∈ ℤ ∧ 𝐴 < 𝑁) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 38 | 4, 37 | sylbi 217 |
. . . . . . . 8
⊢ (𝐴 ∈ (2..^𝑁) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 39 | 38 | adantl 481 |
. . . . . . 7
⊢ ((𝑁 = (𝐴↑2) ∧ 𝐴 ∈ (2..^𝑁)) → (6 ≤ (𝐴↑2) → 3 ≤ 𝐴)) |
| 40 | 3, 39 | sylbid 240 |
. . . . . 6
⊢ ((𝑁 = (𝐴↑2) ∧ 𝐴 ∈ (2..^𝑁)) → (6 ≤ 𝑁 → 3 ≤ 𝐴)) |
| 41 | 40 | ex 412 |
. . . . 5
⊢ (𝑁 = (𝐴↑2) → (𝐴 ∈ (2..^𝑁) → (6 ≤ 𝑁 → 3 ≤ 𝐴))) |
| 42 | 41 | com13 88 |
. . . 4
⊢ (6 ≤
𝑁 → (𝐴 ∈ (2..^𝑁) → (𝑁 = (𝐴↑2) → 3 ≤ 𝐴))) |
| 43 | 42 | 3ad2ant3 1136 |
. . 3
⊢ ((6
∈ ℤ ∧ 𝑁
∈ ℤ ∧ 6 ≤ 𝑁) → (𝐴 ∈ (2..^𝑁) → (𝑁 = (𝐴↑2) → 3 ≤ 𝐴))) |
| 44 | 1, 43 | sylbi 217 |
. 2
⊢ (𝑁 ∈
(ℤ≥‘6) → (𝐴 ∈ (2..^𝑁) → (𝑁 = (𝐴↑2) → 3 ≤ 𝐴))) |
| 45 | 44 | 3imp 1111 |
1
⊢ ((𝑁 ∈
(ℤ≥‘6) ∧ 𝐴 ∈ (2..^𝑁) ∧ 𝑁 = (𝐴↑2)) → 3 ≤ 𝐴) |