Proof of Theorem chebbnd2
| Step | Hyp | Ref
| Expression |
| 1 | | ovexd 7398 |
. . . . 5
⊢ (⊤
→ (2[,)+∞) ∈ V) |
| 2 | | ovexd 7398 |
. . . . 5
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((θ‘𝑥) / 𝑥) ∈ V) |
| 3 | | ovexd 7398 |
. . . . 5
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)) ∈ V) |
| 4 | | eqidd 2741 |
. . . . 5
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ ((θ‘𝑥) / 𝑥)) = (𝑥 ∈ (2[,)+∞) ↦
((θ‘𝑥) / 𝑥))) |
| 5 | | 2re 12253 |
. . . . . . . . . . 11
⊢ 2 ∈
ℝ |
| 6 | | elicopnf 13396 |
. . . . . . . . . . 11
⊢ (2 ∈
ℝ → (𝑥 ∈
(2[,)+∞) ↔ (𝑥
∈ ℝ ∧ 2 ≤ 𝑥))) |
| 7 | 5, 6 | ax-mp 5 |
. . . . . . . . . 10
⊢ (𝑥 ∈ (2[,)+∞) ↔
(𝑥 ∈ ℝ ∧ 2
≤ 𝑥)) |
| 8 | 7 | bilani 505 |
. . . . . . . . 9
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (𝑥 ∈ ℝ ∧ 2 ≤ 𝑥)) |
| 9 | | chtrpcl 27163 |
. . . . . . . . 9
⊢ ((𝑥 ∈ ℝ ∧ 2 ≤
𝑥) →
(θ‘𝑥) ∈
ℝ+) |
| 10 | 8, 9 | syl 17 |
. . . . . . . 8
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (θ‘𝑥) ∈
ℝ+) |
| 11 | 10 | rpcnne0d 12993 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((θ‘𝑥) ∈ ℂ ∧ (θ‘𝑥) ≠ 0)) |
| 12 | | ppinncl 27162 |
. . . . . . . . . . 11
⊢ ((𝑥 ∈ ℝ ∧ 2 ≤
𝑥) →
(π‘𝑥)
∈ ℕ) |
| 13 | 8, 12 | syl 17 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (π‘𝑥) ∈ ℕ) |
| 14 | 13 | nnrpd 12982 |
. . . . . . . . 9
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (π‘𝑥) ∈
ℝ+) |
| 15 | 8 | simpld 495 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 𝑥 ∈ ℝ) |
| 16 | | 1red 11143 |
. . . . . . . . . . 11
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 1 ∈ ℝ) |
| 17 | 5 | a1i 11 |
. . . . . . . . . . 11
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 2 ∈ ℝ) |
| 18 | | 1lt2 12345 |
. . . . . . . . . . . 12
⊢ 1 <
2 |
| 19 | 18 | a1i 11 |
. . . . . . . . . . 11
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 1 < 2) |
| 20 | 8 | simprd 496 |
. . . . . . . . . . 11
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 2 ≤ 𝑥) |
| 21 | 16, 17, 15, 19, 20 | ltletrd 11304 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 1 < 𝑥) |
| 22 | 15, 21 | rplogcld 26618 |
. . . . . . . . 9
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (log‘𝑥) ∈
ℝ+) |
| 23 | 14, 22 | rpmulcld 13000 |
. . . . . . . 8
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((π‘𝑥) · (log‘𝑥)) ∈
ℝ+) |
| 24 | 23 | rpcnne0d 12993 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (((π‘𝑥) · (log‘𝑥)) ∈ ℂ ∧
((π‘𝑥)
· (log‘𝑥))
≠ 0)) |
| 25 | | recdiv 11859 |
. . . . . . 7
⊢
((((θ‘𝑥)
∈ ℂ ∧ (θ‘𝑥) ≠ 0) ∧ (((π‘𝑥) · (log‘𝑥)) ∈ ℂ ∧
((π‘𝑥)
· (log‘𝑥))
≠ 0)) → (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))) = (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥))) |
| 26 | 11, 24, 25 | syl2anc 590 |
. . . . . 6
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))) = (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥))) |
| 27 | 26 | mpteq2dva 5172 |
. . . . 5
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) = (𝑥 ∈ (2[,)+∞) ↦
(((π‘𝑥)
· (log‘𝑥)) /
(θ‘𝑥)))) |
| 28 | 1, 2, 3, 4, 27 | offval2 7647 |
. . . 4
⊢ (⊤
→ ((𝑥 ∈
(2[,)+∞) ↦ ((θ‘𝑥) / 𝑥)) ∘f · (𝑥 ∈ (2[,)+∞) ↦
(1 / ((θ‘𝑥) /
((π‘𝑥)
· (log‘𝑥))))))
= (𝑥 ∈ (2[,)+∞)
↦ (((θ‘𝑥)
/ 𝑥) ·
(((π‘𝑥)
· (log‘𝑥)) /
(θ‘𝑥))))) |
| 29 | | 0red 11145 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 0 ∈ ℝ) |
| 30 | | 2pos 12282 |
. . . . . . . . . . 11
⊢ 0 <
2 |
| 31 | 30 | a1i 11 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 0 < 2) |
| 32 | 29, 17, 15, 31, 20 | ltletrd 11304 |
. . . . . . . . 9
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 0 < 𝑥) |
| 33 | 15, 32 | elrpd 12981 |
. . . . . . . 8
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 𝑥 ∈ ℝ+) |
| 34 | 33 | rpcnne0d 12993 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0)) |
| 35 | 23 | rpcnd 12986 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((π‘𝑥) · (log‘𝑥)) ∈ ℂ) |
| 36 | | dmdcan 11863 |
. . . . . . 7
⊢
((((θ‘𝑥)
∈ ℂ ∧ (θ‘𝑥) ≠ 0) ∧ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ ((π‘𝑥) · (log‘𝑥)) ∈ ℂ) →
(((θ‘𝑥) / 𝑥) ·
(((π‘𝑥)
· (log‘𝑥)) /
(θ‘𝑥))) =
(((π‘𝑥)
· (log‘𝑥)) /
𝑥)) |
| 37 | 11, 34, 35, 36 | syl3anc 1379 |
. . . . . 6
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (((θ‘𝑥) / 𝑥) · (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥))) = (((π‘𝑥) · (log‘𝑥)) / 𝑥)) |
| 38 | 14 | rpcnd 12986 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (π‘𝑥) ∈ ℂ) |
| 39 | 22 | rpcnne0d 12993 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((log‘𝑥) ∈ ℂ ∧ (log‘𝑥) ≠ 0)) |
| 40 | | divdiv2 11865 |
. . . . . . 7
⊢
(((π‘𝑥) ∈ ℂ ∧ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ ((log‘𝑥) ∈ ℂ ∧ (log‘𝑥) ≠ 0)) →
((π‘𝑥) /
(𝑥 / (log‘𝑥))) = (((π‘𝑥) · (log‘𝑥)) / 𝑥)) |
| 41 | 38, 34, 39, 40 | syl3anc 1379 |
. . . . . 6
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((π‘𝑥) / (𝑥 / (log‘𝑥))) = (((π‘𝑥) · (log‘𝑥)) / 𝑥)) |
| 42 | 37, 41 | eqtr4d 2778 |
. . . . 5
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → (((θ‘𝑥) / 𝑥) · (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥))) = ((π‘𝑥) / (𝑥 / (log‘𝑥)))) |
| 43 | 42 | mpteq2dva 5172 |
. . . 4
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ (((θ‘𝑥) / 𝑥) · (((π‘𝑥) · (log‘𝑥)) / (θ‘𝑥)))) = (𝑥 ∈ (2[,)+∞) ↦
((π‘𝑥) /
(𝑥 / (log‘𝑥))))) |
| 44 | 28, 43 | eqtrd 2775 |
. . 3
⊢ (⊤
→ ((𝑥 ∈
(2[,)+∞) ↦ ((θ‘𝑥) / 𝑥)) ∘f · (𝑥 ∈ (2[,)+∞) ↦
(1 / ((θ‘𝑥) /
((π‘𝑥)
· (log‘𝑥))))))
= (𝑥 ∈ (2[,)+∞)
↦ ((π‘𝑥) / (𝑥 / (log‘𝑥))))) |
| 45 | 33 | ex 413 |
. . . . . 6
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) → 𝑥
∈ ℝ+)) |
| 46 | 45 | ssrdv 3928 |
. . . . 5
⊢ (⊤
→ (2[,)+∞) ⊆ ℝ+) |
| 47 | | chto1ub 27464 |
. . . . . 6
⊢ (𝑥 ∈ ℝ+
↦ ((θ‘𝑥)
/ 𝑥)) ∈
𝑂(1) |
| 48 | 47 | a1i 11 |
. . . . 5
⊢ (⊤
→ (𝑥 ∈
ℝ+ ↦ ((θ‘𝑥) / 𝑥)) ∈ 𝑂(1)) |
| 49 | 46, 48 | o1res2 15523 |
. . . 4
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ ((θ‘𝑥) / 𝑥)) ∈ 𝑂(1)) |
| 50 | | ax-1cn 11094 |
. . . . . . 7
⊢ 1 ∈
ℂ |
| 51 | 50 | a1i 11 |
. . . . . 6
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → 1 ∈ ℂ) |
| 52 | 10, 23 | rpdivcld 13001 |
. . . . . . 7
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ∈
ℝ+) |
| 53 | 52 | rpcnd 12986 |
. . . . . 6
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ∈ ℂ) |
| 54 | | pnfxr 11197 |
. . . . . . . . 9
⊢ +∞
∈ ℝ* |
| 55 | | icossre 13379 |
. . . . . . . . 9
⊢ ((2
∈ ℝ ∧ +∞ ∈ ℝ*) → (2[,)+∞)
⊆ ℝ) |
| 56 | 5, 54, 55 | mp2an 698 |
. . . . . . . 8
⊢
(2[,)+∞) ⊆ ℝ |
| 57 | | rlimconst 15504 |
. . . . . . . 8
⊢
(((2[,)+∞) ⊆ ℝ ∧ 1 ∈ ℂ) → (𝑥 ∈ (2[,)+∞) ↦
1) ⇝𝑟 1) |
| 58 | 56, 50, 57 | mp2an 698 |
. . . . . . 7
⊢ (𝑥 ∈ (2[,)+∞) ↦
1) ⇝𝑟 1 |
| 59 | 58 | a1i 11 |
. . . . . 6
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ 1) ⇝𝑟 1) |
| 60 | | chtppilim 27463 |
. . . . . . 7
⊢ (𝑥 ∈ (2[,)+∞) ↦
((θ‘𝑥) /
((π‘𝑥)
· (log‘𝑥))))
⇝𝑟 1 |
| 61 | 60 | a1i 11 |
. . . . . 6
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))) ⇝𝑟
1) |
| 62 | | ax-1ne0 11105 |
. . . . . . 7
⊢ 1 ≠
0 |
| 63 | 62 | a1i 11 |
. . . . . 6
⊢ (⊤
→ 1 ≠ 0) |
| 64 | 52 | rpne0d 12989 |
. . . . . 6
⊢
((⊤ ∧ 𝑥
∈ (2[,)+∞)) → ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))) ≠ 0) |
| 65 | 51, 53, 59, 61, 63, 64 | rlimdiv 15606 |
. . . . 5
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ⇝𝑟 (1 /
1)) |
| 66 | | rlimo1 15577 |
. . . . 5
⊢ ((𝑥 ∈ (2[,)+∞) ↦
(1 / ((θ‘𝑥) /
((π‘𝑥)
· (log‘𝑥)))))
⇝𝑟 (1 / 1) → (𝑥 ∈ (2[,)+∞) ↦ (1 /
((θ‘𝑥) /
((π‘𝑥)
· (log‘𝑥)))))
∈ 𝑂(1)) |
| 67 | 65, 66 | syl 17 |
. . . 4
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ∈ 𝑂(1)) |
| 68 | | o1mul 15575 |
. . . 4
⊢ (((𝑥 ∈ (2[,)+∞) ↦
((θ‘𝑥) / 𝑥)) ∈ 𝑂(1) ∧
(𝑥 ∈ (2[,)+∞)
↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥))))) ∈ 𝑂(1)) → ((𝑥 ∈ (2[,)+∞) ↦
((θ‘𝑥) / 𝑥)) ∘f ·
(𝑥 ∈ (2[,)+∞)
↦ (1 / ((θ‘𝑥) / ((π‘𝑥) · (log‘𝑥)))))) ∈ 𝑂(1)) |
| 69 | 49, 67, 68 | syl2anc 590 |
. . 3
⊢ (⊤
→ ((𝑥 ∈
(2[,)+∞) ↦ ((θ‘𝑥) / 𝑥)) ∘f · (𝑥 ∈ (2[,)+∞) ↦
(1 / ((θ‘𝑥) /
((π‘𝑥)
· (log‘𝑥))))))
∈ 𝑂(1)) |
| 70 | 44, 69 | eqeltrrd 2841 |
. 2
⊢ (⊤
→ (𝑥 ∈
(2[,)+∞) ↦ ((π‘𝑥) / (𝑥 / (log‘𝑥)))) ∈ 𝑂(1)) |
| 71 | 70 | mptru 1554 |
1
⊢ (𝑥 ∈ (2[,)+∞) ↦
((π‘𝑥) /
(𝑥 / (log‘𝑥)))) ∈
𝑂(1) |