Proof of Theorem fltoprmlem2
| Step | Hyp | Ref
| Expression |
| 1 | | eluz2 12952 |
. . 3
⊢ (𝑁 ∈
(ℤ≥‘3) ↔ (3 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 3 ≤
𝑁)) |
| 2 | | zlem1lt 12729 |
. . . . 5
⊢ ((3
∈ ℤ ∧ 𝑁
∈ ℤ) → (3 ≤ 𝑁 ↔ (3 − 1) < 𝑁)) |
| 3 | | 3m1e2 12451 |
. . . . . . . . 9
⊢ (3
− 1) = 2 |
| 4 | | 2cn 12399 |
. . . . . . . . . 10
⊢ 2 ∈
ℂ |
| 5 | | exp1 14190 |
. . . . . . . . . 10
⊢ (2 ∈
ℂ → (2↑1) = 2) |
| 6 | 4, 5 | ax-mp 5 |
. . . . . . . . 9
⊢
(2↑1) = 2 |
| 7 | 3, 6 | eqtr4i 2787 |
. . . . . . . 8
⊢ (3
− 1) = (2↑1) |
| 8 | 7 | breq1i 5110 |
. . . . . . 7
⊢ ((3
− 1) < 𝑁 ↔
(2↑1) < 𝑁) |
| 9 | | 2re 12398 |
. . . . . . . . . . . . 13
⊢ 2 ∈
ℝ |
| 10 | 9 | a1i 11 |
. . . . . . . . . . . 12
⊢ (𝐾 ∈ ℕ0
→ 2 ∈ ℝ) |
| 11 | | 1zzd 12708 |
. . . . . . . . . . . 12
⊢ (𝐾 ∈ ℕ0
→ 1 ∈ ℤ) |
| 12 | | nn0z 12698 |
. . . . . . . . . . . 12
⊢ (𝐾 ∈ ℕ0
→ 𝐾 ∈
ℤ) |
| 13 | | 1lt2 12496 |
. . . . . . . . . . . . 13
⊢ 1 <
2 |
| 14 | 13 | a1i 11 |
. . . . . . . . . . . 12
⊢ (𝐾 ∈ ℕ0
→ 1 < 2) |
| 15 | 10, 11, 12, 14 | ltexp2d 14375 |
. . . . . . . . . . 11
⊢ (𝐾 ∈ ℕ0
→ (1 < 𝐾 ↔
(2↑1) < (2↑𝐾))) |
| 16 | | sq2 14320 |
. . . . . . . . . . . . 13
⊢
(2↑2) = 4 |
| 17 | | 2z 12709 |
. . . . . . . . . . . . . 14
⊢ 2 ∈
ℤ |
| 18 | | 2nn0 12604 |
. . . . . . . . . . . . . 14
⊢ 2 ∈
ℕ0 |
| 19 | 17 | a1i 11 |
. . . . . . . . . . . . . . 15
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) → 2
∈ ℤ) |
| 20 | 12 | adantr 486 |
. . . . . . . . . . . . . . 15
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) →
𝐾 ∈
ℤ) |
| 21 | | df-2 12386 |
. . . . . . . . . . . . . . . 16
⊢ 2 = (1 +
1) |
| 22 | 11, 12 | zltp1led 12732 |
. . . . . . . . . . . . . . . . 17
⊢ (𝐾 ∈ ℕ0
→ (1 < 𝐾 ↔ (1
+ 1) ≤ 𝐾)) |
| 23 | 22 | biimpa 482 |
. . . . . . . . . . . . . . . 16
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) → (1 +
1) ≤ 𝐾) |
| 24 | 21, 23 | eqbrtrid 5140 |
. . . . . . . . . . . . . . 15
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) → 2
≤ 𝐾) |
| 25 | | eluz2 12952 |
. . . . . . . . . . . . . . 15
⊢ (𝐾 ∈
(ℤ≥‘2) ↔ (2 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 2 ≤
𝐾)) |
| 26 | 19, 20, 24, 25 | syl3anbrc 1362 |
. . . . . . . . . . . . . 14
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) →
𝐾 ∈
(ℤ≥‘2)) |
| 27 | | dvdsexp 16478 |
. . . . . . . . . . . . . 14
⊢ ((2
∈ ℤ ∧ 2 ∈ ℕ0 ∧ 𝐾 ∈ (ℤ≥‘2))
→ (2↑2) ∥ (2↑𝐾)) |
| 28 | 17, 18, 26, 27 | mp3an12i 1494 |
. . . . . . . . . . . . 13
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) →
(2↑2) ∥ (2↑𝐾)) |
| 29 | 16, 28 | eqbrtrrid 5141 |
. . . . . . . . . . . 12
⊢ ((𝐾 ∈ ℕ0
∧ 1 < 𝐾) → 4
∥ (2↑𝐾)) |
| 30 | 29 | ex 418 |
. . . . . . . . . . 11
⊢ (𝐾 ∈ ℕ0
→ (1 < 𝐾 → 4
∥ (2↑𝐾))) |
| 31 | 15, 30 | sylbird 263 |
. . . . . . . . . 10
⊢ (𝐾 ∈ ℕ0
→ ((2↑1) < (2↑𝐾) → 4 ∥ (2↑𝐾))) |
| 32 | | breq2 5107 |
. . . . . . . . . . 11
⊢ (𝑁 = (2↑𝐾) → ((2↑1) < 𝑁 ↔ (2↑1) < (2↑𝐾))) |
| 33 | | breq2 5107 |
. . . . . . . . . . 11
⊢ (𝑁 = (2↑𝐾) → (4 ∥ 𝑁 ↔ 4 ∥ (2↑𝐾))) |
| 34 | 32, 33 | imbi12d 347 |
. . . . . . . . . 10
⊢ (𝑁 = (2↑𝐾) → (((2↑1) < 𝑁 → 4 ∥ 𝑁) ↔ ((2↑1) < (2↑𝐾) → 4 ∥ (2↑𝐾)))) |
| 35 | 31, 34 | imbitrrid 249 |
. . . . . . . . 9
⊢ (𝑁 = (2↑𝐾) → (𝐾 ∈ ℕ0 →
((2↑1) < 𝑁 → 4
∥ 𝑁))) |
| 36 | 35 | com13 89 |
. . . . . . . 8
⊢
((2↑1) < 𝑁
→ (𝐾 ∈
ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁))) |
| 37 | 36 | a1i 11 |
. . . . . . 7
⊢ (𝑁 ∈ ℤ →
((2↑1) < 𝑁 →
(𝐾 ∈
ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁)))) |
| 38 | 8, 37 | biimtrid 245 |
. . . . . 6
⊢ (𝑁 ∈ ℤ → ((3
− 1) < 𝑁 →
(𝐾 ∈
ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁)))) |
| 39 | 38 | adantl 487 |
. . . . 5
⊢ ((3
∈ ℤ ∧ 𝑁
∈ ℤ) → ((3 − 1) < 𝑁 → (𝐾 ∈ ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁)))) |
| 40 | 2, 39 | sylbid 243 |
. . . 4
⊢ ((3
∈ ℤ ∧ 𝑁
∈ ℤ) → (3 ≤ 𝑁 → (𝐾 ∈ ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁)))) |
| 41 | 40 | 3impia 1135 |
. . 3
⊢ ((3
∈ ℤ ∧ 𝑁
∈ ℤ ∧ 3 ≤ 𝑁) → (𝐾 ∈ ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁))) |
| 42 | 1, 41 | sylbi 220 |
. 2
⊢ (𝑁 ∈
(ℤ≥‘3) → (𝐾 ∈ ℕ0 → (𝑁 = (2↑𝐾) → 4 ∥ 𝑁))) |
| 43 | 42 | 3imp 1128 |
1
⊢ ((𝑁 ∈
(ℤ≥‘3) ∧ 𝐾 ∈ ℕ0 ∧ 𝑁 = (2↑𝐾)) → 4 ∥ 𝑁) |