| Step | Hyp | Ref
| Expression |
| 1 | | fzfid 14029 |
. . . 4
⊢ (𝑀 ∈ ℕ →
(1...𝑀) ∈
Fin) |
| 2 | | pire 26656 |
. . . . . . . 8
⊢ π
∈ ℝ |
| 3 | | basellem8.n |
. . . . . . . . 9
⊢ 𝑁 = ((2 · 𝑀) + 1) |
| 4 | | 2nn 12332 |
. . . . . . . . . . 11
⊢ 2 ∈
ℕ |
| 5 | | nnmulcl 12275 |
. . . . . . . . . . 11
⊢ ((2
∈ ℕ ∧ 𝑀
∈ ℕ) → (2 · 𝑀) ∈ ℕ) |
| 6 | 4, 5 | mpan 703 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (2
· 𝑀) ∈
ℕ) |
| 7 | 6 | peano2nnd 12268 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) + 1) ∈
ℕ) |
| 8 | 3, 7 | eqeltrid 2870 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → 𝑁 ∈
ℕ) |
| 9 | | nndivre 12295 |
. . . . . . . 8
⊢ ((π
∈ ℝ ∧ 𝑁
∈ ℕ) → (π / 𝑁) ∈ ℝ) |
| 10 | 2, 8, 9 | sylancr 599 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → (π /
𝑁) ∈
ℝ) |
| 11 | 10 | resqcld 14181 |
. . . . . 6
⊢ (𝑀 ∈ ℕ → ((π /
𝑁)↑2) ∈
ℝ) |
| 12 | 11 | adantr 486 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((π / 𝑁)↑2) ∈ ℝ) |
| 13 | 3 | basellem1 27282 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · π) / 𝑁) ∈ (0(,)(π / 2))) |
| 14 | | tanrpcl 26706 |
. . . . . . . 8
⊢ (((𝑘 · π) / 𝑁) ∈ (0(,)(π / 2)) →
(tan‘((𝑘 ·
π) / 𝑁)) ∈
ℝ+) |
| 15 | 13, 14 | syl 18 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (tan‘((𝑘 · π) / 𝑁)) ∈
ℝ+) |
| 16 | 15 | rpred 13078 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (tan‘((𝑘 · π) / 𝑁)) ∈ ℝ) |
| 17 | 15 | rpne0d 13083 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (tan‘((𝑘 · π) / 𝑁)) ≠ 0) |
| 18 | | 2z 12644 |
. . . . . . . 8
⊢ 2 ∈
ℤ |
| 19 | | znegcl 12647 |
. . . . . . . 8
⊢ (2 ∈
ℤ → -2 ∈ ℤ) |
| 20 | 18, 19 | ax-mp 5 |
. . . . . . 7
⊢ -2 ∈
ℤ |
| 21 | 20 | a1i 11 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → -2 ∈
ℤ) |
| 22 | 16, 17, 21 | reexpclzd 14305 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑-2) ∈ ℝ) |
| 23 | 12, 22 | remulcld 11257 |
. . . 4
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2)) ∈
ℝ) |
| 24 | | elfznn 13600 |
. . . . . . 7
⊢ (𝑘 ∈ (1...𝑀) → 𝑘 ∈ ℕ) |
| 25 | 24 | adantl 487 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑘 ∈ ℕ) |
| 26 | 25 | nnred 12266 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑘 ∈ ℝ) |
| 27 | 25 | nnne0d 12304 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑘 ≠ 0) |
| 28 | 26, 27, 21 | reexpclzd 14305 |
. . . 4
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑-2) ∈ ℝ) |
| 29 | 15 | rpcnd 13080 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (tan‘((𝑘 · π) / 𝑁)) ∈ ℂ) |
| 30 | | 2nn0 12539 |
. . . . . . . 8
⊢ 2 ∈
ℕ0 |
| 31 | | expneg 14125 |
. . . . . . . 8
⊢
(((tan‘((𝑘
· π) / 𝑁)) ∈
ℂ ∧ 2 ∈ ℕ0) → ((tan‘((𝑘 · π) / 𝑁))↑-2) = (1 /
((tan‘((𝑘 ·
π) / 𝑁))↑2))) |
| 32 | 29, 30, 31 | sylancl 598 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑-2) = (1 / ((tan‘((𝑘 · π) / 𝑁))↑2))) |
| 33 | 32 | oveq2d 7439 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2)) = (((π / 𝑁)↑2) · (1 /
((tan‘((𝑘 ·
π) / 𝑁))↑2)))) |
| 34 | 10 | recnd 11255 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (π /
𝑁) ∈
ℂ) |
| 35 | 34 | sqcld 14200 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((π /
𝑁)↑2) ∈
ℂ) |
| 36 | 35 | adantr 486 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((π / 𝑁)↑2) ∈ ℂ) |
| 37 | | rpexpcl 14136 |
. . . . . . . . 9
⊢
(((tan‘((𝑘
· π) / 𝑁)) ∈
ℝ+ ∧ 2 ∈ ℤ) → ((tan‘((𝑘 · π) / 𝑁))↑2) ∈
ℝ+) |
| 38 | 15, 18, 37 | sylancl 598 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑2) ∈
ℝ+) |
| 39 | 38 | rpcnd 13080 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑2) ∈ ℂ) |
| 40 | 38 | rpne0d 13083 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑2) ≠ 0) |
| 41 | 36, 39, 40 | divrecd 12012 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) / ((tan‘((𝑘 · π) / 𝑁))↑2)) = (((π / 𝑁)↑2) · (1 / ((tan‘((𝑘 · π) / 𝑁))↑2)))) |
| 42 | 33, 41 | eqtr4d 2804 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2)) = (((π / 𝑁)↑2) / ((tan‘((𝑘 · π) / 𝑁))↑2))) |
| 43 | 25 | nnrpd 13076 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑘 ∈ ℝ+) |
| 44 | | rpexpcl 14136 |
. . . . . . 7
⊢ ((𝑘 ∈ ℝ+
∧ -2 ∈ ℤ) → (𝑘↑-2) ∈
ℝ+) |
| 45 | 43, 20, 44 | sylancl 598 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑-2) ∈
ℝ+) |
| 46 | 25 | nncnd 12267 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑘 ∈ ℂ) |
| 47 | 46, 27, 21 | expnegd 14209 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑--2) = (1 / (𝑘↑-2))) |
| 48 | | 2cn 12334 |
. . . . . . . . . . . 12
⊢ 2 ∈
ℂ |
| 49 | 48 | negnegi 11546 |
. . . . . . . . . . 11
⊢ --2 =
2 |
| 50 | 49 | oveq2i 7434 |
. . . . . . . . . 10
⊢ (𝑘↑--2) = (𝑘↑2) |
| 51 | 47, 50 | eqtr3di 2816 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (1 / (𝑘↑-2)) = (𝑘↑2)) |
| 52 | 51 | oveq1d 7438 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((1 / (𝑘↑-2)) · ((π / 𝑁)↑2)) = ((𝑘↑2) · ((π / 𝑁)↑2))) |
| 53 | | nncn 12259 |
. . . . . . . . . . 11
⊢ (𝑘 ∈ ℕ → 𝑘 ∈
ℂ) |
| 54 | | nnne0 12288 |
. . . . . . . . . . 11
⊢ (𝑘 ∈ ℕ → 𝑘 ≠ 0) |
| 55 | 20 | a1i 11 |
. . . . . . . . . . 11
⊢ (𝑘 ∈ ℕ → -2 ∈
ℤ) |
| 56 | 53, 54, 55 | expclzd 14207 |
. . . . . . . . . 10
⊢ (𝑘 ∈ ℕ → (𝑘↑-2) ∈
ℂ) |
| 57 | 25, 56 | syl 18 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑-2) ∈ ℂ) |
| 58 | 46, 27, 21 | expne0d 14208 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑-2) ≠ 0) |
| 59 | 36, 57, 58 | divrec2d 12013 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) / (𝑘↑-2)) = ((1 / (𝑘↑-2)) · ((π / 𝑁)↑2))) |
| 60 | | picn 26658 |
. . . . . . . . . . . 12
⊢ π
∈ ℂ |
| 61 | 60 | a1i 11 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → π ∈
ℂ) |
| 62 | 8 | nncnd 12267 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ → 𝑁 ∈
ℂ) |
| 63 | 62 | adantr 486 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑁 ∈ ℂ) |
| 64 | 8 | nnne0d 12304 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ → 𝑁 ≠ 0) |
| 65 | 64 | adantr 486 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 𝑁 ≠ 0) |
| 66 | 46, 61, 63, 65 | divassd 12044 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · π) / 𝑁) = (𝑘 · (π / 𝑁))) |
| 67 | 66 | oveq1d 7438 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘 · π) / 𝑁)↑2) = ((𝑘 · (π / 𝑁))↑2)) |
| 68 | 34 | adantr 486 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (π / 𝑁) ∈ ℂ) |
| 69 | 46, 68 | sqmuld 14214 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · (π / 𝑁))↑2) = ((𝑘↑2) · ((π / 𝑁)↑2))) |
| 70 | 67, 69 | eqtrd 2801 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘 · π) / 𝑁)↑2) = ((𝑘↑2) · ((π / 𝑁)↑2))) |
| 71 | 52, 59, 70 | 3eqtr4d 2811 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) / (𝑘↑-2)) = (((𝑘 · π) / 𝑁)↑2)) |
| 72 | | elioore 13420 |
. . . . . . . . . 10
⊢ (((𝑘 · π) / 𝑁) ∈ (0(,)(π / 2)) →
((𝑘 · π) / 𝑁) ∈
ℝ) |
| 73 | 13, 72 | syl 18 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · π) / 𝑁) ∈ ℝ) |
| 74 | 73 | resqcld 14181 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘 · π) / 𝑁)↑2) ∈ ℝ) |
| 75 | 38 | rpred 13078 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑2) ∈ ℝ) |
| 76 | | tangtx 26707 |
. . . . . . . . . 10
⊢ (((𝑘 · π) / 𝑁) ∈ (0(,)(π / 2)) →
((𝑘 · π) / 𝑁) < (tan‘((𝑘 · π) / 𝑁))) |
| 77 | 13, 76 | syl 18 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · π) / 𝑁) < (tan‘((𝑘 · π) / 𝑁))) |
| 78 | | eliooord 13450 |
. . . . . . . . . . . . . 14
⊢ (((𝑘 · π) / 𝑁) ∈ (0(,)(π / 2)) →
(0 < ((𝑘 · π)
/ 𝑁) ∧ ((𝑘 · π) / 𝑁) < (π /
2))) |
| 79 | 13, 78 | syl 18 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (0 < ((𝑘 · π) / 𝑁) ∧ ((𝑘 · π) / 𝑁) < (π / 2))) |
| 80 | 79 | simpld 500 |
. . . . . . . . . . . 12
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 0 < ((𝑘 · π) / 𝑁)) |
| 81 | 73, 80 | elrpd 13075 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · π) / 𝑁) ∈
ℝ+) |
| 82 | 81 | rpge0d 13082 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 0 ≤ ((𝑘 · π) / 𝑁)) |
| 83 | 15 | rpge0d 13082 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 0 ≤ (tan‘((𝑘 · π) / 𝑁))) |
| 84 | 73, 16, 82, 83 | lt2sqd 14312 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘 · π) / 𝑁) < (tan‘((𝑘 · π) / 𝑁)) ↔ (((𝑘 · π) / 𝑁)↑2) < ((tan‘((𝑘 · π) / 𝑁))↑2))) |
| 85 | 77, 84 | mpbid 235 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘 · π) / 𝑁)↑2) < ((tan‘((𝑘 · π) / 𝑁))↑2)) |
| 86 | 74, 75, 85 | ltled 11376 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘 · π) / 𝑁)↑2) ≤ ((tan‘((𝑘 · π) / 𝑁))↑2)) |
| 87 | 71, 86 | eqbrtrd 5138 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) / (𝑘↑-2)) ≤ ((tan‘((𝑘 · π) / 𝑁))↑2)) |
| 88 | 12, 45, 38, 87 | lediv23d 13146 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) / ((tan‘((𝑘 · π) / 𝑁))↑2)) ≤ (𝑘↑-2)) |
| 89 | 42, 88 | eqbrtrd 5138 |
. . . 4
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2)) ≤ (𝑘↑-2)) |
| 90 | 1, 23, 28, 89 | fsumle 15877 |
. . 3
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)(((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2)) ≤ Σ𝑘 ∈ (1...𝑀)(𝑘↑-2)) |
| 91 | | oveq2 7431 |
. . . . . . . . . . 11
⊢ (𝑛 = 𝑀 → (2 · 𝑛) = (2 · 𝑀)) |
| 92 | 91 | oveq1d 7438 |
. . . . . . . . . 10
⊢ (𝑛 = 𝑀 → ((2 · 𝑛) + 1) = ((2 · 𝑀) + 1)) |
| 93 | 92, 3 | eqtr4di 2819 |
. . . . . . . . 9
⊢ (𝑛 = 𝑀 → ((2 · 𝑛) + 1) = 𝑁) |
| 94 | 93 | oveq2d 7439 |
. . . . . . . 8
⊢ (𝑛 = 𝑀 → (1 / ((2 · 𝑛) + 1)) = (1 / 𝑁)) |
| 95 | 94 | oveq2d 7439 |
. . . . . . 7
⊢ (𝑛 = 𝑀 → (1 − (1 / ((2 · 𝑛) + 1))) = (1 − (1 / 𝑁))) |
| 96 | 95 | oveq2d 7439 |
. . . . . 6
⊢ (𝑛 = 𝑀 → (((π↑2) / 6) · (1
− (1 / ((2 · 𝑛) + 1)))) = (((π↑2) / 6) · (1
− (1 / 𝑁)))) |
| 97 | 94 | oveq2d 7439 |
. . . . . . 7
⊢ (𝑛 = 𝑀 → (-2 · (1 / ((2 · 𝑛) + 1))) = (-2 · (1 /
𝑁))) |
| 98 | 97 | oveq2d 7439 |
. . . . . 6
⊢ (𝑛 = 𝑀 → (1 + (-2 · (1 / ((2 ·
𝑛) + 1)))) = (1 + (-2
· (1 / 𝑁)))) |
| 99 | 96, 98 | oveq12d 7441 |
. . . . 5
⊢ (𝑛 = 𝑀 → ((((π↑2) / 6) · (1
− (1 / ((2 · 𝑛) + 1)))) · (1 + (-2 · (1 / ((2
· 𝑛) + 1))))) =
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (-2 · (1 / 𝑁))))) |
| 100 | | basel.j |
. . . . . 6
⊢ 𝐽 = (𝐻 ∘f · ((ℕ
× {1}) ∘f + ((ℕ × {-2}) ∘f
· 𝐺))) |
| 101 | | nnex 12257 |
. . . . . . . . 9
⊢ ℕ
∈ V |
| 102 | 101 | a1i 11 |
. . . . . . . 8
⊢ (⊤
→ ℕ ∈ V) |
| 103 | | ovexd 7458 |
. . . . . . . 8
⊢
((⊤ ∧ 𝑛
∈ ℕ) → (((π↑2) / 6) · (1 − (1 / ((2
· 𝑛) + 1)))) ∈
V) |
| 104 | | ovexd 7458 |
. . . . . . . 8
⊢
((⊤ ∧ 𝑛
∈ ℕ) → (1 + (-2 · (1 / ((2 · 𝑛) + 1)))) ∈ V) |
| 105 | | basel.h |
. . . . . . . . 9
⊢ 𝐻 = ((ℕ ×
{((π↑2) / 6)}) ∘f · ((ℕ × {1})
∘f − 𝐺)) |
| 106 | 2 | resqcli 14242 |
. . . . . . . . . . . 12
⊢
(π↑2) ∈ ℝ |
| 107 | | 6re 12349 |
. . . . . . . . . . . 12
⊢ 6 ∈
ℝ |
| 108 | | 6nn 12348 |
. . . . . . . . . . . . 13
⊢ 6 ∈
ℕ |
| 109 | 108 | nnne0i 12294 |
. . . . . . . . . . . 12
⊢ 6 ≠
0 |
| 110 | 106, 107,
109 | redivcli 12000 |
. . . . . . . . . . 11
⊢
((π↑2) / 6) ∈ ℝ |
| 111 | 110 | a1i 11 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑛
∈ ℕ) → ((π↑2) / 6) ∈ ℝ) |
| 112 | | ovexd 7458 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑛
∈ ℕ) → (1 − (1 / ((2 · 𝑛) + 1))) ∈ V) |
| 113 | | fconstmpt 5728 |
. . . . . . . . . . 11
⊢ (ℕ
× {((π↑2) / 6)}) = (𝑛 ∈ ℕ ↦ ((π↑2) /
6)) |
| 114 | 113 | a1i 11 |
. . . . . . . . . 10
⊢ (⊤
→ (ℕ × {((π↑2) / 6)}) = (𝑛 ∈ ℕ ↦ ((π↑2) /
6))) |
| 115 | | 1zzd 12643 |
. . . . . . . . . . 11
⊢
((⊤ ∧ 𝑛
∈ ℕ) → 1 ∈ ℤ) |
| 116 | | ovexd 7458 |
. . . . . . . . . . 11
⊢
((⊤ ∧ 𝑛
∈ ℕ) → (1 / ((2 · 𝑛) + 1)) ∈ V) |
| 117 | | fconstmpt 5728 |
. . . . . . . . . . . 12
⊢ (ℕ
× {1}) = (𝑛 ∈
ℕ ↦ 1) |
| 118 | 117 | a1i 11 |
. . . . . . . . . . 11
⊢ (⊤
→ (ℕ × {1}) = (𝑛 ∈ ℕ ↦ 1)) |
| 119 | | basel.g |
. . . . . . . . . . . 12
⊢ 𝐺 = (𝑛 ∈ ℕ ↦ (1 / ((2 ·
𝑛) + 1))) |
| 120 | 119 | a1i 11 |
. . . . . . . . . . 11
⊢ (⊤
→ 𝐺 = (𝑛 ∈ ℕ ↦ (1 / ((2
· 𝑛) +
1)))) |
| 121 | 102, 115,
116, 118, 120 | offval2 7707 |
. . . . . . . . . 10
⊢ (⊤
→ ((ℕ × {1}) ∘f − 𝐺) = (𝑛 ∈ ℕ ↦ (1 − (1 / ((2
· 𝑛) +
1))))) |
| 122 | 102, 111,
112, 114, 121 | offval2 7707 |
. . . . . . . . 9
⊢ (⊤
→ ((ℕ × {((π↑2) / 6)}) ∘f ·
((ℕ × {1}) ∘f − 𝐺)) = (𝑛 ∈ ℕ ↦ (((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))))) |
| 123 | 105, 122 | eqtrid 2813 |
. . . . . . . 8
⊢ (⊤
→ 𝐻 = (𝑛 ∈ ℕ ↦
(((π↑2) / 6) · (1 − (1 / ((2 · 𝑛) + 1)))))) |
| 124 | | ovexd 7458 |
. . . . . . . . 9
⊢
((⊤ ∧ 𝑛
∈ ℕ) → (-2 · (1 / ((2 · 𝑛) + 1))) ∈ V) |
| 125 | 48 | negcli 11544 |
. . . . . . . . . . 11
⊢ -2 ∈
ℂ |
| 126 | 125 | a1i 11 |
. . . . . . . . . 10
⊢
((⊤ ∧ 𝑛
∈ ℕ) → -2 ∈ ℂ) |
| 127 | | fconstmpt 5728 |
. . . . . . . . . . 11
⊢ (ℕ
× {-2}) = (𝑛 ∈
ℕ ↦ -2) |
| 128 | 127 | a1i 11 |
. . . . . . . . . 10
⊢ (⊤
→ (ℕ × {-2}) = (𝑛 ∈ ℕ ↦ -2)) |
| 129 | 102, 126,
116, 128, 120 | offval2 7707 |
. . . . . . . . 9
⊢ (⊤
→ ((ℕ × {-2}) ∘f · 𝐺) = (𝑛 ∈ ℕ ↦ (-2 · (1 / ((2
· 𝑛) +
1))))) |
| 130 | 102, 115,
124, 118, 129 | offval2 7707 |
. . . . . . . 8
⊢ (⊤
→ ((ℕ × {1}) ∘f + ((ℕ × {-2})
∘f · 𝐺)) = (𝑛 ∈ ℕ ↦ (1 + (-2 · (1
/ ((2 · 𝑛) +
1)))))) |
| 131 | 102, 103,
104, 123, 130 | offval2 7707 |
. . . . . . 7
⊢ (⊤
→ (𝐻
∘f · ((ℕ × {1}) ∘f +
((ℕ × {-2}) ∘f · 𝐺))) = (𝑛 ∈ ℕ ↦ ((((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))) · (1 + (-2 · (1 / ((2
· 𝑛) +
1))))))) |
| 132 | 131 | mptru 1577 |
. . . . . 6
⊢ (𝐻 ∘f ·
((ℕ × {1}) ∘f + ((ℕ × {-2})
∘f · 𝐺))) = (𝑛 ∈ ℕ ↦ ((((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))) · (1 + (-2 · (1 / ((2
· 𝑛) +
1)))))) |
| 133 | 100, 132 | eqtri 2789 |
. . . . 5
⊢ 𝐽 = (𝑛 ∈ ℕ ↦ ((((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))) · (1 + (-2 · (1 / ((2
· 𝑛) +
1)))))) |
| 134 | | ovex 7456 |
. . . . 5
⊢
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (-2 · (1 / 𝑁)))) ∈ V |
| 135 | 99, 133, 134 | fvmpt 6996 |
. . . 4
⊢ (𝑀 ∈ ℕ → (𝐽‘𝑀) = ((((π↑2) / 6) · (1
− (1 / 𝑁))) ·
(1 + (-2 · (1 / 𝑁))))) |
| 136 | 110 | recni 11241 |
. . . . . . . 8
⊢
((π↑2) / 6) ∈ ℂ |
| 137 | 136 | a1i 11 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
((π↑2) / 6) ∈ ℂ) |
| 138 | 6 | nncnd 12267 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → (2
· 𝑀) ∈
ℂ) |
| 139 | 138, 62, 64 | divcld 12009 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) / 𝑁) ∈
ℂ) |
| 140 | | ax-1cn 11176 |
. . . . . . . . 9
⊢ 1 ∈
ℂ |
| 141 | | subcl 11474 |
. . . . . . . . 9
⊢ (((2
· 𝑀) ∈ ℂ
∧ 1 ∈ ℂ) → ((2 · 𝑀) − 1) ∈
ℂ) |
| 142 | 138, 140,
141 | sylancl 598 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) − 1)
∈ ℂ) |
| 143 | 142, 62, 64 | divcld 12009 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) − 1) /
𝑁) ∈
ℂ) |
| 144 | 137, 139,
143 | mulassd 11250 |
. . . . . 6
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · ((2 · 𝑀) / 𝑁)) · (((2 · 𝑀) − 1) / 𝑁)) = (((π↑2) / 6) · (((2
· 𝑀) / 𝑁) · (((2 · 𝑀) − 1) / 𝑁)))) |
| 145 | | 1cnd 11220 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → 1 ∈
ℂ) |
| 146 | 62, 145, 62, 64 | divsubdird 12048 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((𝑁 − 1) / 𝑁) = ((𝑁 / 𝑁) − (1 / 𝑁))) |
| 147 | 3 | oveq1i 7433 |
. . . . . . . . . . 11
⊢ (𝑁 − 1) = (((2 ·
𝑀) + 1) −
1) |
| 148 | | pncan 11481 |
. . . . . . . . . . . 12
⊢ (((2
· 𝑀) ∈ ℂ
∧ 1 ∈ ℂ) → (((2 · 𝑀) + 1) − 1) = (2 · 𝑀)) |
| 149 | 138, 140,
148 | sylancl 598 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) + 1) − 1)
= (2 · 𝑀)) |
| 150 | 147, 149 | eqtrid 2813 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁 − 1) = (2 · 𝑀)) |
| 151 | 150 | oveq1d 7438 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((𝑁 − 1) / 𝑁) = ((2 · 𝑀) / 𝑁)) |
| 152 | 62, 64 | dividd 12007 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁 / 𝑁) = 1) |
| 153 | 152 | oveq1d 7438 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((𝑁 / 𝑁) − (1 / 𝑁)) = (1 − (1 / 𝑁))) |
| 154 | 146, 151,
153 | 3eqtr3rd 2810 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → (1
− (1 / 𝑁)) = ((2
· 𝑀) / 𝑁)) |
| 155 | 154 | oveq2d 7439 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
(((π↑2) / 6) · (1 − (1 / 𝑁))) = (((π↑2) / 6) · ((2
· 𝑀) / 𝑁))) |
| 156 | 125 | a1i 11 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → -2 ∈
ℂ) |
| 157 | 62, 156, 62, 64 | divdird 12047 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((𝑁 + -2) / 𝑁) = ((𝑁 / 𝑁) + (-2 / 𝑁))) |
| 158 | | negsub 11524 |
. . . . . . . . . . 11
⊢ ((𝑁 ∈ ℂ ∧ 2 ∈
ℂ) → (𝑁 + -2) =
(𝑁 −
2)) |
| 159 | 62, 48, 158 | sylancl 598 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁 + -2) = (𝑁 − 2)) |
| 160 | | df-2 12321 |
. . . . . . . . . . . 12
⊢ 2 = (1 +
1) |
| 161 | 3, 160 | oveq12i 7435 |
. . . . . . . . . . 11
⊢ (𝑁 − 2) = (((2 ·
𝑀) + 1) − (1 +
1)) |
| 162 | 138, 145,
145 | pnpcan2d 11625 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) + 1) − (1
+ 1)) = ((2 · 𝑀)
− 1)) |
| 163 | 161, 162 | eqtrid 2813 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁 − 2) = ((2 · 𝑀) − 1)) |
| 164 | 159, 163 | eqtrd 2801 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (𝑁 + -2) = ((2 · 𝑀) − 1)) |
| 165 | 164 | oveq1d 7438 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((𝑁 + -2) / 𝑁) = (((2 · 𝑀) − 1) / 𝑁)) |
| 166 | 156, 62, 64 | divrecd 12012 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (-2 /
𝑁) = (-2 · (1 /
𝑁))) |
| 167 | 152, 166 | oveq12d 7441 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((𝑁 / 𝑁) + (-2 / 𝑁)) = (1 + (-2 · (1 / 𝑁)))) |
| 168 | 157, 165,
167 | 3eqtr3rd 2810 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → (1 + (-2
· (1 / 𝑁))) = (((2
· 𝑀) − 1) /
𝑁)) |
| 169 | 155, 168 | oveq12d 7441 |
. . . . . 6
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (-2 · (1 / 𝑁)))) = ((((π↑2) / 6)
· ((2 · 𝑀) /
𝑁)) · (((2 ·
𝑀) − 1) / 𝑁))) |
| 170 | 8 | nnsqcld 14300 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → (𝑁↑2) ∈
ℕ) |
| 171 | 170 | nncnd 12267 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁↑2) ∈
ℂ) |
| 172 | | 6cn 12350 |
. . . . . . . . . . 11
⊢ 6 ∈
ℂ |
| 173 | 172 | a1i 11 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → 6 ∈
ℂ) |
| 174 | 171, 173 | mulcomd 11248 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((𝑁↑2) · 6) = (6
· (𝑁↑2))) |
| 175 | 174 | oveq2d 7439 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ →
(((π↑2) · ((2 · 𝑀) · ((2 · 𝑀) − 1))) / ((𝑁↑2) · 6)) = (((π↑2)
· ((2 · 𝑀)
· ((2 · 𝑀)
− 1))) / (6 · (𝑁↑2)))) |
| 176 | 106 | recni 11241 |
. . . . . . . . . 10
⊢
(π↑2) ∈ ℂ |
| 177 | 176 | a1i 11 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ →
(π↑2) ∈ ℂ) |
| 178 | 138, 142 | mulcld 11247 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · ((2
· 𝑀) − 1))
∈ ℂ) |
| 179 | 170 | nnne0d 12304 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁↑2) ≠
0) |
| 180 | 171, 179 | jca 521 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((𝑁↑2) ∈ ℂ ∧
(𝑁↑2) ≠
0)) |
| 181 | 172, 109 | pm3.2i 476 |
. . . . . . . . . 10
⊢ (6 ∈
ℂ ∧ 6 ≠ 0) |
| 182 | 181 | a1i 11 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (6 ∈
ℂ ∧ 6 ≠ 0)) |
| 183 | | divmuldiv 11933 |
. . . . . . . . 9
⊢
((((π↑2) ∈ ℂ ∧ ((2 · 𝑀) · ((2 · 𝑀) − 1)) ∈ ℂ) ∧ (((𝑁↑2) ∈ ℂ ∧
(𝑁↑2) ≠ 0) ∧ (6
∈ ℂ ∧ 6 ≠ 0))) → (((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) / 6)) =
(((π↑2) · ((2 · 𝑀) · ((2 · 𝑀) − 1))) / ((𝑁↑2) · 6))) |
| 184 | 177, 178,
180, 182, 183 | syl22anc 852 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ →
(((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) / 6)) =
(((π↑2) · ((2 · 𝑀) · ((2 · 𝑀) − 1))) / ((𝑁↑2) · 6))) |
| 185 | | divmuldiv 11933 |
. . . . . . . . 9
⊢
((((π↑2) ∈ ℂ ∧ ((2 · 𝑀) · ((2 · 𝑀) − 1)) ∈ ℂ) ∧ ((6
∈ ℂ ∧ 6 ≠ 0) ∧ ((𝑁↑2) ∈ ℂ ∧ (𝑁↑2) ≠ 0))) →
(((π↑2) / 6) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) / (𝑁↑2))) = (((π↑2) · ((2
· 𝑀) · ((2
· 𝑀) − 1))) /
(6 · (𝑁↑2)))) |
| 186 | 177, 178,
182, 180, 185 | syl22anc 852 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ →
(((π↑2) / 6) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) / (𝑁↑2))) = (((π↑2) · ((2
· 𝑀) · ((2
· 𝑀) − 1))) /
(6 · (𝑁↑2)))) |
| 187 | 175, 184,
186 | 3eqtr4d 2811 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
(((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) / 6)) =
(((π↑2) / 6) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) / (𝑁↑2)))) |
| 188 | 60 | a1i 11 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → π
∈ ℂ) |
| 189 | 188, 62, 64 | sqdivd 14215 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((π /
𝑁)↑2) = ((π↑2)
/ (𝑁↑2))) |
| 190 | 189 | oveq1d 7438 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) · (((2
· 𝑀) · ((2
· 𝑀) − 1)) /
6)) = (((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · ((2 · 𝑀) − 1)) /
6))) |
| 191 | 138, 62, 142, 62, 64, 64 | divmuldivd 12050 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) / 𝑁) · (((2 · 𝑀) − 1) / 𝑁)) = (((2 · 𝑀) · ((2 · 𝑀) − 1)) / (𝑁 · 𝑁))) |
| 192 | 62 | sqvald 14199 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (𝑁↑2) = (𝑁 · 𝑁)) |
| 193 | 192 | oveq2d 7439 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) · ((2
· 𝑀) − 1)) /
(𝑁↑2)) = (((2 ·
𝑀) · ((2 ·
𝑀) − 1)) / (𝑁 · 𝑁))) |
| 194 | 191, 193 | eqtr4d 2804 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) / 𝑁) · (((2 · 𝑀) − 1) / 𝑁)) = (((2 · 𝑀) · ((2 · 𝑀) − 1)) / (𝑁↑2))) |
| 195 | 194 | oveq2d 7439 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
(((π↑2) / 6) · (((2 · 𝑀) / 𝑁) · (((2 · 𝑀) − 1) / 𝑁))) = (((π↑2) / 6) · (((2
· 𝑀) · ((2
· 𝑀) − 1)) /
(𝑁↑2)))) |
| 196 | 187, 190,
195 | 3eqtr4d 2811 |
. . . . . 6
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) · (((2
· 𝑀) · ((2
· 𝑀) − 1)) /
6)) = (((π↑2) / 6) · (((2 · 𝑀) / 𝑁) · (((2 · 𝑀) − 1) / 𝑁)))) |
| 197 | 144, 169,
196 | 3eqtr4d 2811 |
. . . . 5
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (-2 · (1 / 𝑁)))) = (((π / 𝑁)↑2) · (((2 ·
𝑀) · ((2 ·
𝑀) − 1)) /
6))) |
| 198 | | eqid 2766 |
. . . . . . 7
⊢ (𝑥 ∈ ℂ ↦
Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑥↑𝑗))) = (𝑥 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑥↑𝑗))) |
| 199 | | eqid 2766 |
. . . . . . 7
⊢ (𝑛 ∈ (1...𝑀) ↦ ((tan‘((𝑛 · π) / 𝑁))↑-2)) = (𝑛 ∈ (1...𝑀) ↦ ((tan‘((𝑛 · π) / 𝑁))↑-2)) |
| 200 | 3, 198, 199 | basellem5 27286 |
. . . . . 6
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)((tan‘((𝑘 · π) / 𝑁))↑-2) = (((2 ·
𝑀) · ((2 ·
𝑀) − 1)) /
6)) |
| 201 | 200 | oveq2d 7439 |
. . . . 5
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) ·
Σ𝑘 ∈ (1...𝑀)((tan‘((𝑘 · π) / 𝑁))↑-2)) = (((π / 𝑁)↑2) · (((2 ·
𝑀) · ((2 ·
𝑀) − 1)) /
6))) |
| 202 | 197, 201 | eqtr4d 2804 |
. . . 4
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (-2 · (1 / 𝑁)))) = (((π / 𝑁)↑2) · Σ𝑘 ∈ (1...𝑀)((tan‘((𝑘 · π) / 𝑁))↑-2))) |
| 203 | 22 | recnd 11255 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑-2) ∈ ℂ) |
| 204 | 1, 35, 203 | fsummulc2 15861 |
. . . 4
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) ·
Σ𝑘 ∈ (1...𝑀)((tan‘((𝑘 · π) / 𝑁))↑-2)) = Σ𝑘 ∈ (1...𝑀)(((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2))) |
| 205 | 135, 202,
204 | 3eqtrd 2805 |
. . 3
⊢ (𝑀 ∈ ℕ → (𝐽‘𝑀) = Σ𝑘 ∈ (1...𝑀)(((π / 𝑁)↑2) · ((tan‘((𝑘 · π) / 𝑁))↑-2))) |
| 206 | | basel.f |
. . . . 5
⊢ 𝐹 = seq1( + , (𝑛 ∈ ℕ ↦ (𝑛↑-2))) |
| 207 | 206 | fveq1i 6889 |
. . . 4
⊢ (𝐹‘𝑀) = (seq1( + , (𝑛 ∈ ℕ ↦ (𝑛↑-2)))‘𝑀) |
| 208 | | oveq1 7430 |
. . . . . . 7
⊢ (𝑛 = 𝑘 → (𝑛↑-2) = (𝑘↑-2)) |
| 209 | | eqid 2766 |
. . . . . . 7
⊢ (𝑛 ∈ ℕ ↦ (𝑛↑-2)) = (𝑛 ∈ ℕ ↦ (𝑛↑-2)) |
| 210 | | ovex 7456 |
. . . . . . 7
⊢ (𝑘↑-2) ∈
V |
| 211 | 208, 209,
210 | fvmpt 6996 |
. . . . . 6
⊢ (𝑘 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (𝑛↑-2))‘𝑘) = (𝑘↑-2)) |
| 212 | 25, 211 | syl 18 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑛 ∈ ℕ ↦ (𝑛↑-2))‘𝑘) = (𝑘↑-2)) |
| 213 | | id 23 |
. . . . . 6
⊢ (𝑀 ∈ ℕ → 𝑀 ∈
ℕ) |
| 214 | | nnuz 12919 |
. . . . . 6
⊢ ℕ =
(ℤ≥‘1) |
| 215 | 213, 214 | eleqtrdi 2876 |
. . . . 5
⊢ (𝑀 ∈ ℕ → 𝑀 ∈
(ℤ≥‘1)) |
| 216 | 212, 215,
57 | fsumser 15807 |
. . . 4
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)(𝑘↑-2) = (seq1( + , (𝑛 ∈ ℕ ↦ (𝑛↑-2)))‘𝑀)) |
| 217 | 207, 216 | eqtr4id 2820 |
. . 3
⊢ (𝑀 ∈ ℕ → (𝐹‘𝑀) = Σ𝑘 ∈ (1...𝑀)(𝑘↑-2)) |
| 218 | 90, 205, 217 | 3brtr4d 5148 |
. 2
⊢ (𝑀 ∈ ℕ → (𝐽‘𝑀) ≤ (𝐹‘𝑀)) |
| 219 | 73 | resincld 16224 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (sin‘((𝑘 · π) / 𝑁)) ∈ ℝ) |
| 220 | | sincosq1sgn 26700 |
. . . . . . . . 9
⊢ (((𝑘 · π) / 𝑁) ∈ (0(,)(π / 2)) →
(0 < (sin‘((𝑘
· π) / 𝑁)) ∧
0 < (cos‘((𝑘
· π) / 𝑁)))) |
| 221 | 13, 220 | syl 18 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (0 < (sin‘((𝑘 · π) / 𝑁)) ∧ 0 <
(cos‘((𝑘 ·
π) / 𝑁)))) |
| 222 | 221 | simpld 500 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 0 < (sin‘((𝑘 · π) / 𝑁))) |
| 223 | 222 | gt0ne0d 11796 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (sin‘((𝑘 · π) / 𝑁)) ≠ 0) |
| 224 | 219, 223,
21 | reexpclzd 14305 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑-2) ∈ ℝ) |
| 225 | 12, 224 | remulcld 11257 |
. . . 4
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2)) ∈
ℝ) |
| 226 | | sinltx 16270 |
. . . . . . . . . 10
⊢ (((𝑘 · π) / 𝑁) ∈ ℝ+
→ (sin‘((𝑘
· π) / 𝑁)) <
((𝑘 · π) / 𝑁)) |
| 227 | 81, 226 | syl 18 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (sin‘((𝑘 · π) / 𝑁)) < ((𝑘 · π) / 𝑁)) |
| 228 | 219, 73, 227 | ltled 11376 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (sin‘((𝑘 · π) / 𝑁)) ≤ ((𝑘 · π) / 𝑁)) |
| 229 | | 0re 11228 |
. . . . . . . . . . 11
⊢ 0 ∈
ℝ |
| 230 | | ltle 11316 |
. . . . . . . . . . 11
⊢ ((0
∈ ℝ ∧ (sin‘((𝑘 · π) / 𝑁)) ∈ ℝ) → (0 <
(sin‘((𝑘 ·
π) / 𝑁)) → 0 ≤
(sin‘((𝑘 ·
π) / 𝑁)))) |
| 231 | 229, 219,
230 | sylancr 599 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (0 < (sin‘((𝑘 · π) / 𝑁)) → 0 ≤
(sin‘((𝑘 ·
π) / 𝑁)))) |
| 232 | 222, 231 | mpd 16 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 0 ≤ (sin‘((𝑘 · π) / 𝑁))) |
| 233 | 219, 73, 232, 82 | le2sqd 14313 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁)) ≤ ((𝑘 · π) / 𝑁) ↔ ((sin‘((𝑘 · π) / 𝑁))↑2) ≤ (((𝑘 · π) / 𝑁)↑2))) |
| 234 | 228, 233 | mpbid 235 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑2) ≤ (((𝑘 · π) / 𝑁)↑2)) |
| 235 | 234, 71 | breqtrrd 5144 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑2) ≤ (((π / 𝑁)↑2) / (𝑘↑-2))) |
| 236 | 219 | resqcld 14181 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑2) ∈ ℝ) |
| 237 | 236, 12, 45 | lemuldiv2d 13128 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘↑-2) · ((sin‘((𝑘 · π) / 𝑁))↑2)) ≤ ((π / 𝑁)↑2) ↔
((sin‘((𝑘 ·
π) / 𝑁))↑2) ≤
(((π / 𝑁)↑2) /
(𝑘↑-2)))) |
| 238 | 219, 222 | elrpd 13075 |
. . . . . . . . 9
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (sin‘((𝑘 · π) / 𝑁)) ∈
ℝ+) |
| 239 | | rpexpcl 14136 |
. . . . . . . . 9
⊢
(((sin‘((𝑘
· π) / 𝑁)) ∈
ℝ+ ∧ 2 ∈ ℤ) → ((sin‘((𝑘 · π) / 𝑁))↑2) ∈
ℝ+) |
| 240 | 238, 18, 239 | sylancl 598 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑2) ∈
ℝ+) |
| 241 | 28, 12, 240 | lemuldivd 13127 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((𝑘↑-2) · ((sin‘((𝑘 · π) / 𝑁))↑2)) ≤ ((π / 𝑁)↑2) ↔ (𝑘↑-2) ≤ (((π / 𝑁)↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2)))) |
| 242 | 237, 241 | bitr3d 284 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((sin‘((𝑘 · π) / 𝑁))↑2) ≤ (((π / 𝑁)↑2) / (𝑘↑-2)) ↔ (𝑘↑-2) ≤ (((π / 𝑁)↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2)))) |
| 243 | 235, 242 | mpbid 235 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑-2) ≤ (((π / 𝑁)↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2))) |
| 244 | 219 | recnd 11255 |
. . . . . . . 8
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (sin‘((𝑘 · π) / 𝑁)) ∈ ℂ) |
| 245 | | expneg 14125 |
. . . . . . . 8
⊢
(((sin‘((𝑘
· π) / 𝑁)) ∈
ℂ ∧ 2 ∈ ℕ0) → ((sin‘((𝑘 · π) / 𝑁))↑-2) = (1 /
((sin‘((𝑘 ·
π) / 𝑁))↑2))) |
| 246 | 244, 30, 245 | sylancl 598 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑-2) = (1 / ((sin‘((𝑘 · π) / 𝑁))↑2))) |
| 247 | 246 | oveq2d 7439 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2)) = (((π / 𝑁)↑2) · (1 /
((sin‘((𝑘 ·
π) / 𝑁))↑2)))) |
| 248 | 236 | recnd 11255 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑2) ∈ ℂ) |
| 249 | 240 | rpne0d 13083 |
. . . . . . 7
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑2) ≠ 0) |
| 250 | 36, 248, 249 | divrecd 12012 |
. . . . . 6
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2)) = (((π / 𝑁)↑2) · (1 / ((sin‘((𝑘 · π) / 𝑁))↑2)))) |
| 251 | 247, 250 | eqtr4d 2804 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2)) = (((π / 𝑁)↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2))) |
| 252 | 243, 251 | breqtrrd 5144 |
. . . 4
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (𝑘↑-2) ≤ (((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2))) |
| 253 | 1, 28, 225, 252 | fsumle 15877 |
. . 3
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)(𝑘↑-2) ≤ Σ𝑘 ∈ (1...𝑀)(((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2))) |
| 254 | 94 | oveq2d 7439 |
. . . . . 6
⊢ (𝑛 = 𝑀 → (1 + (1 / ((2 · 𝑛) + 1))) = (1 + (1 / 𝑁))) |
| 255 | 96, 254 | oveq12d 7441 |
. . . . 5
⊢ (𝑛 = 𝑀 → ((((π↑2) / 6) · (1
− (1 / ((2 · 𝑛) + 1)))) · (1 + (1 / ((2 ·
𝑛) + 1)))) =
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (1 / 𝑁)))) |
| 256 | | basel.k |
. . . . . 6
⊢ 𝐾 = (𝐻 ∘f · ((ℕ
× {1}) ∘f + 𝐺)) |
| 257 | | ovexd 7458 |
. . . . . . . 8
⊢
((⊤ ∧ 𝑛
∈ ℕ) → (1 + (1 / ((2 · 𝑛) + 1))) ∈ V) |
| 258 | 102, 115,
116, 118, 120 | offval2 7707 |
. . . . . . . 8
⊢ (⊤
→ ((ℕ × {1}) ∘f + 𝐺) = (𝑛 ∈ ℕ ↦ (1 + (1 / ((2
· 𝑛) +
1))))) |
| 259 | 102, 103,
257, 123, 258 | offval2 7707 |
. . . . . . 7
⊢ (⊤
→ (𝐻
∘f · ((ℕ × {1}) ∘f + 𝐺)) = (𝑛 ∈ ℕ ↦ ((((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))) · (1 + (1 / ((2 ·
𝑛) +
1)))))) |
| 260 | 259 | mptru 1577 |
. . . . . 6
⊢ (𝐻 ∘f ·
((ℕ × {1}) ∘f + 𝐺)) = (𝑛 ∈ ℕ ↦ ((((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))) · (1 + (1 / ((2 ·
𝑛) +
1))))) |
| 261 | 256, 260 | eqtri 2789 |
. . . . 5
⊢ 𝐾 = (𝑛 ∈ ℕ ↦ ((((π↑2) / 6)
· (1 − (1 / ((2 · 𝑛) + 1)))) · (1 + (1 / ((2 ·
𝑛) +
1))))) |
| 262 | | ovex 7456 |
. . . . 5
⊢
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (1 / 𝑁))) ∈ V |
| 263 | 255, 261,
262 | fvmpt 6996 |
. . . 4
⊢ (𝑀 ∈ ℕ → (𝐾‘𝑀) = ((((π↑2) / 6) · (1
− (1 / 𝑁))) ·
(1 + (1 / 𝑁)))) |
| 264 | | peano2cn 11400 |
. . . . . . . 8
⊢ (𝑁 ∈ ℂ → (𝑁 + 1) ∈
ℂ) |
| 265 | 62, 264 | syl 18 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → (𝑁 + 1) ∈
ℂ) |
| 266 | 265, 62, 64 | divcld 12009 |
. . . . . 6
⊢ (𝑀 ∈ ℕ → ((𝑁 + 1) / 𝑁) ∈ ℂ) |
| 267 | 137, 139,
266 | mulassd 11250 |
. . . . 5
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · ((2 · 𝑀) / 𝑁)) · ((𝑁 + 1) / 𝑁)) = (((π↑2) / 6) · (((2
· 𝑀) / 𝑁) · ((𝑁 + 1) / 𝑁)))) |
| 268 | 62, 145, 62, 64 | divdird 12047 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → ((𝑁 + 1) / 𝑁) = ((𝑁 / 𝑁) + (1 / 𝑁))) |
| 269 | 152 | oveq1d 7438 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → ((𝑁 / 𝑁) + (1 / 𝑁)) = (1 + (1 / 𝑁))) |
| 270 | 268, 269 | eqtr2d 2802 |
. . . . . 6
⊢ (𝑀 ∈ ℕ → (1 + (1 /
𝑁)) = ((𝑁 + 1) / 𝑁)) |
| 271 | 155, 270 | oveq12d 7441 |
. . . . 5
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (1 / 𝑁))) = ((((π↑2) / 6) · ((2
· 𝑀) / 𝑁)) · ((𝑁 + 1) / 𝑁))) |
| 272 | 174 | oveq2d 7439 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
(((π↑2) · ((2 · 𝑀) · (𝑁 + 1))) / ((𝑁↑2) · 6)) = (((π↑2)
· ((2 · 𝑀)
· (𝑁 + 1))) / (6
· (𝑁↑2)))) |
| 273 | 138, 265 | mulcld 11247 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · (𝑁 + 1)) ∈
ℂ) |
| 274 | | divmuldiv 11933 |
. . . . . . . 8
⊢
((((π↑2) ∈ ℂ ∧ ((2 · 𝑀) · (𝑁 + 1)) ∈ ℂ) ∧ (((𝑁↑2) ∈ ℂ ∧
(𝑁↑2) ≠ 0) ∧ (6
∈ ℂ ∧ 6 ≠ 0))) → (((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · (𝑁 + 1)) / 6)) = (((π↑2) · ((2
· 𝑀) · (𝑁 + 1))) / ((𝑁↑2) · 6))) |
| 275 | 177, 273,
180, 182, 274 | syl22anc 852 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
(((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · (𝑁 + 1)) / 6)) = (((π↑2) · ((2
· 𝑀) · (𝑁 + 1))) / ((𝑁↑2) · 6))) |
| 276 | | divmuldiv 11933 |
. . . . . . . 8
⊢
((((π↑2) ∈ ℂ ∧ ((2 · 𝑀) · (𝑁 + 1)) ∈ ℂ) ∧ ((6 ∈
ℂ ∧ 6 ≠ 0) ∧ ((𝑁↑2) ∈ ℂ ∧ (𝑁↑2) ≠ 0))) →
(((π↑2) / 6) · (((2 · 𝑀) · (𝑁 + 1)) / (𝑁↑2))) = (((π↑2) · ((2
· 𝑀) · (𝑁 + 1))) / (6 · (𝑁↑2)))) |
| 277 | 177, 273,
182, 180, 276 | syl22anc 852 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
(((π↑2) / 6) · (((2 · 𝑀) · (𝑁 + 1)) / (𝑁↑2))) = (((π↑2) · ((2
· 𝑀) · (𝑁 + 1))) / (6 · (𝑁↑2)))) |
| 278 | 272, 275,
277 | 3eqtr4d 2811 |
. . . . . 6
⊢ (𝑀 ∈ ℕ →
(((π↑2) / (𝑁↑2)) · (((2 · 𝑀) · (𝑁 + 1)) / 6)) = (((π↑2) / 6) ·
(((2 · 𝑀) ·
(𝑁 + 1)) / (𝑁↑2)))) |
| 279 | 73 | recoscld 16225 |
. . . . . . . . . . . . . . 15
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (cos‘((𝑘 · π) / 𝑁)) ∈ ℝ) |
| 280 | 279 | recnd 11255 |
. . . . . . . . . . . . . 14
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (cos‘((𝑘 · π) / 𝑁)) ∈ ℂ) |
| 281 | 280 | sqcld 14200 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((cos‘((𝑘 · π) / 𝑁))↑2) ∈ ℂ) |
| 282 | 248, 281,
248, 249 | divdird 12047 |
. . . . . . . . . . . 12
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((((sin‘((𝑘 · π) / 𝑁))↑2) + ((cos‘((𝑘 · π) / 𝑁))↑2)) /
((sin‘((𝑘 ·
π) / 𝑁))↑2)) =
((((sin‘((𝑘 ·
π) / 𝑁))↑2) /
((sin‘((𝑘 ·
π) / 𝑁))↑2)) +
(((cos‘((𝑘 ·
π) / 𝑁))↑2) /
((sin‘((𝑘 ·
π) / 𝑁))↑2)))) |
| 283 | 73 | recnd 11255 |
. . . . . . . . . . . . . 14
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((𝑘 · π) / 𝑁) ∈ ℂ) |
| 284 | | sincossq 16257 |
. . . . . . . . . . . . . 14
⊢ (((𝑘 · π) / 𝑁) ∈ ℂ →
(((sin‘((𝑘 ·
π) / 𝑁))↑2) +
((cos‘((𝑘 ·
π) / 𝑁))↑2)) =
1) |
| 285 | 283, 284 | syl 18 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((sin‘((𝑘 · π) / 𝑁))↑2) + ((cos‘((𝑘 · π) / 𝑁))↑2)) =
1) |
| 286 | 285 | oveq1d 7438 |
. . . . . . . . . . . 12
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((((sin‘((𝑘 · π) / 𝑁))↑2) + ((cos‘((𝑘 · π) / 𝑁))↑2)) /
((sin‘((𝑘 ·
π) / 𝑁))↑2)) = (1 /
((sin‘((𝑘 ·
π) / 𝑁))↑2))) |
| 287 | 248, 249 | dividd 12007 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((sin‘((𝑘 · π) / 𝑁))↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2)) =
1) |
| 288 | 221 | simprd 501 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 0 < (cos‘((𝑘 · π) / 𝑁))) |
| 289 | 288 | gt0ne0d 11796 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (cos‘((𝑘 · π) / 𝑁)) ≠ 0) |
| 290 | | tanval 16209 |
. . . . . . . . . . . . . . . . . 18
⊢ ((((𝑘 · π) / 𝑁) ∈ ℂ ∧
(cos‘((𝑘 ·
π) / 𝑁)) ≠ 0) →
(tan‘((𝑘 ·
π) / 𝑁)) =
((sin‘((𝑘 ·
π) / 𝑁)) /
(cos‘((𝑘 ·
π) / 𝑁)))) |
| 291 | 283, 289,
290 | syl2anc 596 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (tan‘((𝑘 · π) / 𝑁)) = ((sin‘((𝑘 · π) / 𝑁)) / (cos‘((𝑘 · π) / 𝑁)))) |
| 292 | 291 | oveq1d 7438 |
. . . . . . . . . . . . . . . 16
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑2) = (((sin‘((𝑘 · π) / 𝑁)) / (cos‘((𝑘 · π) / 𝑁)))↑2)) |
| 293 | 244, 280,
289 | sqdivd 14215 |
. . . . . . . . . . . . . . . 16
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((sin‘((𝑘 · π) / 𝑁)) / (cos‘((𝑘 · π) / 𝑁)))↑2) = (((sin‘((𝑘 · π) / 𝑁))↑2) / ((cos‘((𝑘 · π) / 𝑁))↑2))) |
| 294 | 292, 293 | eqtrd 2801 |
. . . . . . . . . . . . . . 15
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((tan‘((𝑘 · π) / 𝑁))↑2) = (((sin‘((𝑘 · π) / 𝑁))↑2) / ((cos‘((𝑘 · π) / 𝑁))↑2))) |
| 295 | 294 | oveq2d 7439 |
. . . . . . . . . . . . . 14
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (1 / ((tan‘((𝑘 · π) / 𝑁))↑2)) = (1 /
(((sin‘((𝑘 ·
π) / 𝑁))↑2) /
((cos‘((𝑘 ·
π) / 𝑁))↑2)))) |
| 296 | | sqne0 14179 |
. . . . . . . . . . . . . . . . 17
⊢
((cos‘((𝑘
· π) / 𝑁)) ∈
ℂ → (((cos‘((𝑘 · π) / 𝑁))↑2) ≠ 0 ↔ (cos‘((𝑘 · π) / 𝑁)) ≠ 0)) |
| 297 | 280, 296 | syl 18 |
. . . . . . . . . . . . . . . 16
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((cos‘((𝑘 · π) / 𝑁))↑2) ≠ 0 ↔ (cos‘((𝑘 · π) / 𝑁)) ≠ 0)) |
| 298 | 289, 297 | mpbird 260 |
. . . . . . . . . . . . . . 15
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((cos‘((𝑘 · π) / 𝑁))↑2) ≠ 0) |
| 299 | 248, 281,
249, 298 | recdivd 12026 |
. . . . . . . . . . . . . 14
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (1 / (((sin‘((𝑘 · π) / 𝑁))↑2) / ((cos‘((𝑘 · π) / 𝑁))↑2))) =
(((cos‘((𝑘 ·
π) / 𝑁))↑2) /
((sin‘((𝑘 ·
π) / 𝑁))↑2))) |
| 300 | 32, 295, 299 | 3eqtrrd 2806 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (((cos‘((𝑘 · π) / 𝑁))↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2)) =
((tan‘((𝑘 ·
π) / 𝑁))↑-2)) |
| 301 | 287, 300 | oveq12d 7441 |
. . . . . . . . . . . 12
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((((sin‘((𝑘 · π) / 𝑁))↑2) / ((sin‘((𝑘 · π) / 𝑁))↑2)) +
(((cos‘((𝑘 ·
π) / 𝑁))↑2) /
((sin‘((𝑘 ·
π) / 𝑁))↑2))) = (1
+ ((tan‘((𝑘 ·
π) / 𝑁))↑-2))) |
| 302 | 282, 286,
301 | 3eqtr3d 2809 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (1 / ((sin‘((𝑘 · π) / 𝑁))↑2)) = (1 +
((tan‘((𝑘 ·
π) / 𝑁))↑-2))) |
| 303 | | addcom 11414 |
. . . . . . . . . . . 12
⊢ ((1
∈ ℂ ∧ ((tan‘((𝑘 · π) / 𝑁))↑-2) ∈ ℂ) → (1 +
((tan‘((𝑘 ·
π) / 𝑁))↑-2)) =
(((tan‘((𝑘 ·
π) / 𝑁))↑-2) +
1)) |
| 304 | 140, 203,
303 | sylancr 599 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → (1 + ((tan‘((𝑘 · π) / 𝑁))↑-2)) =
(((tan‘((𝑘 ·
π) / 𝑁))↑-2) +
1)) |
| 305 | 246, 302,
304 | 3eqtrd 2805 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑-2) = (((tan‘((𝑘 · π) / 𝑁))↑-2) +
1)) |
| 306 | 305 | sumeq2dv 15779 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2) = Σ𝑘 ∈ (1...𝑀)(((tan‘((𝑘 · π) / 𝑁))↑-2) + 1)) |
| 307 | | 1cnd 11220 |
. . . . . . . . . 10
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → 1 ∈ ℂ) |
| 308 | 1, 203, 307 | fsumadd 15817 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)(((tan‘((𝑘 · π) / 𝑁))↑-2) + 1) = (Σ𝑘 ∈ (1...𝑀)((tan‘((𝑘 · π) / 𝑁))↑-2) + Σ𝑘 ∈ (1...𝑀)1)) |
| 309 | | fsumconst 15867 |
. . . . . . . . . . . 12
⊢
(((1...𝑀) ∈ Fin
∧ 1 ∈ ℂ) → Σ𝑘 ∈ (1...𝑀)1 = ((♯‘(1...𝑀)) · 1)) |
| 310 | 1, 140, 309 | sylancl 598 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)1 = ((♯‘(1...𝑀)) · 1)) |
| 311 | | nnnn0 12529 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ ℕ → 𝑀 ∈
ℕ0) |
| 312 | | hashfz1 14402 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ ℕ0
→ (♯‘(1...𝑀)) = 𝑀) |
| 313 | 311, 312 | syl 18 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ →
(♯‘(1...𝑀)) =
𝑀) |
| 314 | 313 | oveq1d 7438 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ →
((♯‘(1...𝑀))
· 1) = (𝑀 ·
1)) |
| 315 | | nncn 12259 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ → 𝑀 ∈
ℂ) |
| 316 | 315 | mulridd 11244 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → (𝑀 · 1) = 𝑀) |
| 317 | 310, 314,
316 | 3eqtrd 2805 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)1 = 𝑀) |
| 318 | 200, 317 | oveq12d 7441 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ →
(Σ𝑘 ∈ (1...𝑀)((tan‘((𝑘 · π) / 𝑁))↑-2) + Σ𝑘 ∈ (1...𝑀)1) = ((((2 · 𝑀) · ((2 · 𝑀) − 1)) / 6) + 𝑀)) |
| 319 | 306, 308,
318 | 3eqtrd 2805 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2) = ((((2 ·
𝑀) · ((2 ·
𝑀) − 1)) / 6) + 𝑀)) |
| 320 | | 3cn 12340 |
. . . . . . . . . . . . 13
⊢ 3 ∈
ℂ |
| 321 | 320 | a1i 11 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ → 3 ∈
ℂ) |
| 322 | 138, 142,
321 | adddid 11251 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · (((2
· 𝑀) − 1) +
3)) = (((2 · 𝑀)
· ((2 · 𝑀)
− 1)) + ((2 · 𝑀) · 3))) |
| 323 | | 3m1e2 12386 |
. . . . . . . . . . . . . . . 16
⊢ (3
− 1) = 2 |
| 324 | 323, 160 | eqtri 2789 |
. . . . . . . . . . . . . . 15
⊢ (3
− 1) = (1 + 1) |
| 325 | 324 | oveq2i 7434 |
. . . . . . . . . . . . . 14
⊢ ((2
· 𝑀) + (3 −
1)) = ((2 · 𝑀) + (1
+ 1)) |
| 326 | 138, 145,
321 | subadd23d 11609 |
. . . . . . . . . . . . . 14
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) − 1) + 3)
= ((2 · 𝑀) + (3
− 1))) |
| 327 | 138, 145,
145 | addassd 11249 |
. . . . . . . . . . . . . 14
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) + 1) + 1) = ((2
· 𝑀) + (1 +
1))) |
| 328 | 325, 326,
327 | 3eqtr4a 2827 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) − 1) + 3)
= (((2 · 𝑀) + 1) +
1)) |
| 329 | 3 | oveq1i 7433 |
. . . . . . . . . . . . 13
⊢ (𝑁 + 1) = (((2 · 𝑀) + 1) + 1) |
| 330 | 328, 329 | eqtr4di 2819 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) − 1) + 3)
= (𝑁 + 1)) |
| 331 | 330 | oveq2d 7439 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · (((2
· 𝑀) − 1) +
3)) = ((2 · 𝑀)
· (𝑁 +
1))) |
| 332 | | 2cnd 12337 |
. . . . . . . . . . . . . 14
⊢ (𝑀 ∈ ℕ → 2 ∈
ℂ) |
| 333 | 332, 315,
321 | mul32d 11438 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · 3) =
((2 · 3) · 𝑀)) |
| 334 | | 2t3e6 12425 |
. . . . . . . . . . . . . 14
⊢ (2
· 3) = 6 |
| 335 | 334 | oveq1i 7433 |
. . . . . . . . . . . . 13
⊢ ((2
· 3) · 𝑀) =
(6 · 𝑀) |
| 336 | 333, 335 | eqtrdi 2817 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · 3) =
(6 · 𝑀)) |
| 337 | 336 | oveq2d 7439 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) · ((2
· 𝑀) − 1)) +
((2 · 𝑀) ·
3)) = (((2 · 𝑀)
· ((2 · 𝑀)
− 1)) + (6 · 𝑀))) |
| 338 | 322, 331,
337 | 3eqtr3d 2809 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → ((2
· 𝑀) · (𝑁 + 1)) = (((2 · 𝑀) · ((2 · 𝑀) − 1)) + (6 ·
𝑀))) |
| 339 | 338 | oveq1d 7438 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) · (𝑁 + 1)) / 6) = ((((2 ·
𝑀) · ((2 ·
𝑀) − 1)) + (6
· 𝑀)) /
6)) |
| 340 | | mulcl 11202 |
. . . . . . . . . . 11
⊢ ((6
∈ ℂ ∧ 𝑀
∈ ℂ) → (6 · 𝑀) ∈ ℂ) |
| 341 | 172, 315,
340 | sylancr 599 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → (6
· 𝑀) ∈
ℂ) |
| 342 | 109 | a1i 11 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → 6 ≠
0) |
| 343 | 178, 341,
173, 342 | divdird 12047 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((((2
· 𝑀) · ((2
· 𝑀) − 1)) +
(6 · 𝑀)) / 6) =
((((2 · 𝑀) ·
((2 · 𝑀) − 1))
/ 6) + ((6 · 𝑀) /
6))) |
| 344 | 315, 173,
342 | divcan3d 12014 |
. . . . . . . . . 10
⊢ (𝑀 ∈ ℕ → ((6
· 𝑀) / 6) = 𝑀) |
| 345 | 344 | oveq2d 7439 |
. . . . . . . . 9
⊢ (𝑀 ∈ ℕ → ((((2
· 𝑀) · ((2
· 𝑀) − 1)) /
6) + ((6 · 𝑀) / 6))
= ((((2 · 𝑀)
· ((2 · 𝑀)
− 1)) / 6) + 𝑀)) |
| 346 | 339, 343,
345 | 3eqtrd 2805 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) · (𝑁 + 1)) / 6) = ((((2 ·
𝑀) · ((2 ·
𝑀) − 1)) / 6) + 𝑀)) |
| 347 | 319, 346 | eqtr4d 2804 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ →
Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2) = (((2 ·
𝑀) · (𝑁 + 1)) / 6)) |
| 348 | 189, 347 | oveq12d 7441 |
. . . . . 6
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) ·
Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2)) = (((π↑2) /
(𝑁↑2)) · (((2
· 𝑀) · (𝑁 + 1)) / 6))) |
| 349 | 138, 62, 265, 62, 64, 64 | divmuldivd 12050 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) / 𝑁) · ((𝑁 + 1) / 𝑁)) = (((2 · 𝑀) · (𝑁 + 1)) / (𝑁 · 𝑁))) |
| 350 | 192 | oveq2d 7439 |
. . . . . . . 8
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) · (𝑁 + 1)) / (𝑁↑2)) = (((2 · 𝑀) · (𝑁 + 1)) / (𝑁 · 𝑁))) |
| 351 | 349, 350 | eqtr4d 2804 |
. . . . . . 7
⊢ (𝑀 ∈ ℕ → (((2
· 𝑀) / 𝑁) · ((𝑁 + 1) / 𝑁)) = (((2 · 𝑀) · (𝑁 + 1)) / (𝑁↑2))) |
| 352 | 351 | oveq2d 7439 |
. . . . . 6
⊢ (𝑀 ∈ ℕ →
(((π↑2) / 6) · (((2 · 𝑀) / 𝑁) · ((𝑁 + 1) / 𝑁))) = (((π↑2) / 6) · (((2
· 𝑀) · (𝑁 + 1)) / (𝑁↑2)))) |
| 353 | 278, 348,
352 | 3eqtr4d 2811 |
. . . . 5
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) ·
Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2)) = (((π↑2) /
6) · (((2 · 𝑀) / 𝑁) · ((𝑁 + 1) / 𝑁)))) |
| 354 | 267, 271,
353 | 3eqtr4d 2811 |
. . . 4
⊢ (𝑀 ∈ ℕ →
((((π↑2) / 6) · (1 − (1 / 𝑁))) · (1 + (1 / 𝑁))) = (((π / 𝑁)↑2) · Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2))) |
| 355 | 224 | recnd 11255 |
. . . . 5
⊢ ((𝑀 ∈ ℕ ∧ 𝑘 ∈ (1...𝑀)) → ((sin‘((𝑘 · π) / 𝑁))↑-2) ∈ ℂ) |
| 356 | 1, 35, 355 | fsummulc2 15861 |
. . . 4
⊢ (𝑀 ∈ ℕ → (((π /
𝑁)↑2) ·
Σ𝑘 ∈ (1...𝑀)((sin‘((𝑘 · π) / 𝑁))↑-2)) = Σ𝑘 ∈ (1...𝑀)(((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2))) |
| 357 | 263, 354,
356 | 3eqtrd 2805 |
. . 3
⊢ (𝑀 ∈ ℕ → (𝐾‘𝑀) = Σ𝑘 ∈ (1...𝑀)(((π / 𝑁)↑2) · ((sin‘((𝑘 · π) / 𝑁))↑-2))) |
| 358 | 253, 217,
357 | 3brtr4d 5148 |
. 2
⊢ (𝑀 ∈ ℕ → (𝐹‘𝑀) ≤ (𝐾‘𝑀)) |
| 359 | 218, 358 | jca 521 |
1
⊢ (𝑀 ∈ ℕ → ((𝐽‘𝑀) ≤ (𝐹‘𝑀) ∧ (𝐹‘𝑀) ≤ (𝐾‘𝑀))) |