Proof of Theorem fourierdlem58
| Step | Hyp | Ref
| Expression |
| 1 | | pire 26439 |
. . . . . . . . . 10
⊢ π
∈ ℝ |
| 2 | 1 | a1i 11 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → π ∈
ℝ) |
| 3 | 2 | renegcld 11568 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → -π ∈
ℝ) |
| 4 | 3, 2 | iccssred 13378 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (-π[,]π) ⊆
ℝ) |
| 5 | | fourierdlem58.ass |
. . . . . . . 8
⊢ (𝜑 → 𝐴 ⊆ (-π[,]π)) |
| 6 | 5 | sselda 3915 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 𝑠 ∈ (-π[,]π)) |
| 7 | 4, 6 | sseldd 3916 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 𝑠 ∈ ℝ) |
| 8 | | 2re 12246 |
. . . . . . . 8
⊢ 2 ∈
ℝ |
| 9 | 8 | a1i 11 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 2 ∈ ℝ) |
| 10 | 7 | rehalfcld 12415 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (𝑠 / 2) ∈ ℝ) |
| 11 | 10 | resincld 16101 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (sin‘(𝑠 / 2)) ∈ ℝ) |
| 12 | 9, 11 | remulcld 11166 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (2 · (sin‘(𝑠 / 2))) ∈
ℝ) |
| 13 | | 2cnd 12250 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 2 ∈ ℂ) |
| 14 | 7 | recnd 11164 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 𝑠 ∈ ℂ) |
| 15 | 14 | halfcld 12413 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (𝑠 / 2) ∈ ℂ) |
| 16 | 15 | sincld 16088 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (sin‘(𝑠 / 2)) ∈ ℂ) |
| 17 | | 2ne0 12276 |
. . . . . . . 8
⊢ 2 ≠
0 |
| 18 | 17 | a1i 11 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 2 ≠ 0) |
| 19 | | eqcom 2746 |
. . . . . . . . . . . . 13
⊢ (𝑠 = 0 ↔ 0 = 𝑠) |
| 20 | 19 | bilani 505 |
. . . . . . . . . . . 12
⊢ ((𝑠 ∈ 𝐴 ∧ 𝑠 = 0) → 0 = 𝑠) |
| 21 | | simpl 483 |
. . . . . . . . . . . 12
⊢ ((𝑠 ∈ 𝐴 ∧ 𝑠 = 0) → 𝑠 ∈ 𝐴) |
| 22 | 20, 21 | eqeltrd 2839 |
. . . . . . . . . . 11
⊢ ((𝑠 ∈ 𝐴 ∧ 𝑠 = 0) → 0 ∈ 𝐴) |
| 23 | 22 | adantll 720 |
. . . . . . . . . 10
⊢ (((𝜑 ∧ 𝑠 ∈ 𝐴) ∧ 𝑠 = 0) → 0 ∈ 𝐴) |
| 24 | | fourierdlem58.0nA |
. . . . . . . . . . 11
⊢ (𝜑 → ¬ 0 ∈ 𝐴) |
| 25 | 24 | ad2antrr 732 |
. . . . . . . . . 10
⊢ (((𝜑 ∧ 𝑠 ∈ 𝐴) ∧ 𝑠 = 0) → ¬ 0 ∈ 𝐴) |
| 26 | 23, 25 | pm2.65da 822 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → ¬ 𝑠 = 0) |
| 27 | 26 | neqned 2941 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → 𝑠 ≠ 0) |
| 28 | | fourierdlem44 46594 |
. . . . . . . 8
⊢ ((𝑠 ∈ (-π[,]π) ∧
𝑠 ≠ 0) →
(sin‘(𝑠 / 2)) ≠
0) |
| 29 | 6, 27, 28 | syl2anc 590 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (sin‘(𝑠 / 2)) ≠ 0) |
| 30 | 13, 16, 18, 29 | mulne0d 11793 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (2 · (sin‘(𝑠 / 2))) ≠ 0) |
| 31 | 7, 12, 30 | redivcld 11974 |
. . . . 5
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (𝑠 / (2 · (sin‘(𝑠 / 2)))) ∈ ℝ) |
| 32 | | fourierdlem58.k |
. . . . 5
⊢ 𝐾 = (𝑠 ∈ 𝐴 ↦ (𝑠 / (2 · (sin‘(𝑠 / 2))))) |
| 33 | 31, 32 | fmptd 7055 |
. . . 4
⊢ (𝜑 → 𝐾:𝐴⟶ℝ) |
| 34 | 1 | a1i 11 |
. . . . . . 7
⊢ (𝜑 → π ∈
ℝ) |
| 35 | 34 | renegcld 11568 |
. . . . . 6
⊢ (𝜑 → -π ∈
ℝ) |
| 36 | 35, 34 | iccssred 13378 |
. . . . 5
⊢ (𝜑 → (-π[,]π) ⊆
ℝ) |
| 37 | 5, 36 | sstrd 3925 |
. . . 4
⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| 38 | | dvfre 25936 |
. . . 4
⊢ ((𝐾:𝐴⟶ℝ ∧ 𝐴 ⊆ ℝ) → (ℝ D 𝐾):dom (ℝ D 𝐾)⟶ℝ) |
| 39 | 33, 37, 38 | syl2anc 590 |
. . 3
⊢ (𝜑 → (ℝ D 𝐾):dom (ℝ D 𝐾)⟶ℝ) |
| 40 | | fourierdlem58.4 |
. . . . . . . . 9
⊢ (𝜑 → 𝐴 ∈ (topGen‘ran
(,))) |
| 41 | | eqidd 2740 |
. . . . . . . . 9
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ 𝑠) = (𝑠 ∈ 𝐴 ↦ 𝑠)) |
| 42 | | eqidd 2740 |
. . . . . . . . 9
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))) = (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))) |
| 43 | 40, 7, 12, 41, 42 | offval2 7640 |
. . . . . . . 8
⊢ (𝜑 → ((𝑠 ∈ 𝐴 ↦ 𝑠) ∘f / (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))) = (𝑠 ∈ 𝐴 ↦ (𝑠 / (2 · (sin‘(𝑠 / 2)))))) |
| 44 | 32, 43 | eqtr4id 2793 |
. . . . . . 7
⊢ (𝜑 → 𝐾 = ((𝑠 ∈ 𝐴 ↦ 𝑠) ∘f / (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))))) |
| 45 | 44 | oveq2d 7372 |
. . . . . 6
⊢ (𝜑 → (ℝ D 𝐾) = (ℝ D ((𝑠 ∈ 𝐴 ↦ 𝑠) ∘f / (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))))) |
| 46 | | reelprrecn 11121 |
. . . . . . . 8
⊢ ℝ
∈ {ℝ, ℂ} |
| 47 | 46 | a1i 11 |
. . . . . . 7
⊢ (𝜑 → ℝ ∈ {ℝ,
ℂ}) |
| 48 | | eqid 2739 |
. . . . . . . 8
⊢ (𝑠 ∈ 𝐴 ↦ 𝑠) = (𝑠 ∈ 𝐴 ↦ 𝑠) |
| 49 | 14, 48 | fmptd 7055 |
. . . . . . 7
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ 𝑠):𝐴⟶ℂ) |
| 50 | 13, 16 | mulcld 11156 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (2 · (sin‘(𝑠 / 2))) ∈
ℂ) |
| 51 | 30 | neneqd 2939 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → ¬ (2 · (sin‘(𝑠 / 2))) = 0) |
| 52 | | elsng 4569 |
. . . . . . . . . . 11
⊢ ((2
· (sin‘(𝑠 /
2))) ∈ ℝ → ((2 · (sin‘(𝑠 / 2))) ∈ {0} ↔ (2 ·
(sin‘(𝑠 / 2))) =
0)) |
| 53 | 12, 52 | syl 17 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → ((2 · (sin‘(𝑠 / 2))) ∈ {0} ↔ (2
· (sin‘(𝑠 /
2))) = 0)) |
| 54 | 51, 53 | mtbird 326 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → ¬ (2 · (sin‘(𝑠 / 2))) ∈
{0}) |
| 55 | 50, 54 | eldifd 3894 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑠 ∈ 𝐴) → (2 · (sin‘(𝑠 / 2))) ∈ (ℂ ∖
{0})) |
| 56 | | eqid 2739 |
. . . . . . . 8
⊢ (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))) = (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))) |
| 57 | 55, 56 | fmptd 7055 |
. . . . . . 7
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))):𝐴⟶(ℂ ∖
{0})) |
| 58 | | tgioo4 24788 |
. . . . . . . . . 10
⊢
(topGen‘ran (,)) = ((TopOpen‘ℂfld)
↾t ℝ) |
| 59 | 40, 58 | eleqtrdi 2849 |
. . . . . . . . 9
⊢ (𝜑 → 𝐴 ∈
((TopOpen‘ℂfld) ↾t
ℝ)) |
| 60 | 47, 59 | dvmptidg 46360 |
. . . . . . . 8
⊢ (𝜑 → (ℝ D (𝑠 ∈ 𝐴 ↦ 𝑠)) = (𝑠 ∈ 𝐴 ↦ 1)) |
| 61 | | ax-resscn 11086 |
. . . . . . . . . . 11
⊢ ℝ
⊆ ℂ |
| 62 | 61 | a1i 11 |
. . . . . . . . . 10
⊢ (𝜑 → ℝ ⊆
ℂ) |
| 63 | 37, 62 | sstrd 3925 |
. . . . . . . . 9
⊢ (𝜑 → 𝐴 ⊆ ℂ) |
| 64 | | 1cnd 11130 |
. . . . . . . . 9
⊢ (𝜑 → 1 ∈
ℂ) |
| 65 | | ssid 3937 |
. . . . . . . . . 10
⊢ ℂ
⊆ ℂ |
| 66 | 65 | a1i 11 |
. . . . . . . . 9
⊢ (𝜑 → ℂ ⊆
ℂ) |
| 67 | 63, 64, 66 | constcncfg 46315 |
. . . . . . . 8
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ 1) ∈ (𝐴–cn→ℂ)) |
| 68 | 60, 67 | eqeltrd 2839 |
. . . . . . 7
⊢ (𝜑 → (ℝ D (𝑠 ∈ 𝐴 ↦ 𝑠)) ∈ (𝐴–cn→ℂ)) |
| 69 | 37 | resmptd 5992 |
. . . . . . . . . . 11
⊢ (𝜑 → ((𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 / 2))))
↾ 𝐴) = (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))) |
| 70 | 69 | eqcomd 2745 |
. . . . . . . . . 10
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))) = ((𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 / 2))))
↾ 𝐴)) |
| 71 | 70 | oveq2d 7372 |
. . . . . . . . 9
⊢ (𝜑 → (ℝ D (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))) = (ℝ D ((𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2)))) ↾ 𝐴))) |
| 72 | | eqid 2739 |
. . . . . . . . . . . 12
⊢ (𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2)))) = (𝑠 ∈ ℝ
↦ (2 · (sin‘(𝑠 / 2)))) |
| 73 | | 2cnd 12250 |
. . . . . . . . . . . . 13
⊢ (𝑠 ∈ ℝ → 2 ∈
ℂ) |
| 74 | | recn 11119 |
. . . . . . . . . . . . . . 15
⊢ (𝑠 ∈ ℝ → 𝑠 ∈
ℂ) |
| 75 | 74 | halfcld 12413 |
. . . . . . . . . . . . . 14
⊢ (𝑠 ∈ ℝ → (𝑠 / 2) ∈
ℂ) |
| 76 | 75 | sincld 16088 |
. . . . . . . . . . . . 13
⊢ (𝑠 ∈ ℝ →
(sin‘(𝑠 / 2)) ∈
ℂ) |
| 77 | 73, 76 | mulcld 11156 |
. . . . . . . . . . . 12
⊢ (𝑠 ∈ ℝ → (2
· (sin‘(𝑠 /
2))) ∈ ℂ) |
| 78 | 72, 77 | fmpti 7053 |
. . . . . . . . . . 11
⊢ (𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2)))):ℝ⟶ℂ |
| 79 | 78 | a1i 11 |
. . . . . . . . . 10
⊢ (𝜑 → (𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 /
2)))):ℝ⟶ℂ) |
| 80 | | ssid 3937 |
. . . . . . . . . . 11
⊢ ℝ
⊆ ℝ |
| 81 | 80 | a1i 11 |
. . . . . . . . . 10
⊢ (𝜑 → ℝ ⊆
ℝ) |
| 82 | | eqid 2739 |
. . . . . . . . . . 11
⊢
(TopOpen‘ℂfld) =
(TopOpen‘ℂfld) |
| 83 | 82, 58 | dvres 25896 |
. . . . . . . . . 10
⊢
(((ℝ ⊆ ℂ ∧ (𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 /
2)))):ℝ⟶ℂ) ∧ (ℝ ⊆ ℝ ∧ 𝐴 ⊆ ℝ)) →
(ℝ D ((𝑠 ∈
ℝ ↦ (2 · (sin‘(𝑠 / 2)))) ↾ 𝐴)) = ((ℝ D (𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 / 2)))))
↾ ((int‘(topGen‘ran (,)))‘𝐴))) |
| 84 | 62, 79, 81, 37, 83 | syl22anc 844 |
. . . . . . . . 9
⊢ (𝜑 → (ℝ D ((𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2)))) ↾ 𝐴)) =
((ℝ D (𝑠 ∈
ℝ ↦ (2 · (sin‘(𝑠 / 2))))) ↾
((int‘(topGen‘ran (,)))‘𝐴))) |
| 85 | | retop 24744 |
. . . . . . . . . . . . . 14
⊢
(topGen‘ran (,)) ∈ Top |
| 86 | 85 | a1i 11 |
. . . . . . . . . . . . 13
⊢ (𝜑 → (topGen‘ran (,))
∈ Top) |
| 87 | | uniretop 24745 |
. . . . . . . . . . . . . 14
⊢ ℝ =
∪ (topGen‘ran (,)) |
| 88 | 87 | isopn3 23049 |
. . . . . . . . . . . . 13
⊢
(((topGen‘ran (,)) ∈ Top ∧ 𝐴 ⊆ ℝ) → (𝐴 ∈ (topGen‘ran (,)) ↔
((int‘(topGen‘ran (,)))‘𝐴) = 𝐴)) |
| 89 | 86, 37, 88 | syl2anc 590 |
. . . . . . . . . . . 12
⊢ (𝜑 → (𝐴 ∈ (topGen‘ran (,)) ↔
((int‘(topGen‘ran (,)))‘𝐴) = 𝐴)) |
| 90 | 40, 89 | mpbid 233 |
. . . . . . . . . . 11
⊢ (𝜑 →
((int‘(topGen‘ran (,)))‘𝐴) = 𝐴) |
| 91 | 90 | reseq2d 5931 |
. . . . . . . . . 10
⊢ (𝜑 → ((ℝ D (𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2))))) ↾ ((int‘(topGen‘ran (,)))‘𝐴)) = ((ℝ D (𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 / 2)))))
↾ 𝐴)) |
| 92 | | resmpt 5989 |
. . . . . . . . . . . . . . . 16
⊢ (ℝ
⊆ ℂ → ((𝑠
∈ ℂ ↦ (2 · (sin‘((1 / 2) · 𝑠)))) ↾ ℝ) = (𝑠 ∈ ℝ ↦ (2
· (sin‘((1 / 2) · 𝑠))))) |
| 93 | 61, 92 | ax-mp 5 |
. . . . . . . . . . . . . . 15
⊢ ((𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠)))) ↾ ℝ) = (𝑠 ∈ ℝ ↦ (2 ·
(sin‘((1 / 2) · 𝑠)))) |
| 94 | | id 22 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑠 ∈ ℂ → 𝑠 ∈
ℂ) |
| 95 | | 2cnd 12250 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑠 ∈ ℂ → 2 ∈
ℂ) |
| 96 | 17 | a1i 11 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑠 ∈ ℂ → 2 ≠
0) |
| 97 | 94, 95, 96 | divrec2d 11926 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑠 ∈ ℂ → (𝑠 / 2) = ((1 / 2) · 𝑠)) |
| 98 | 97 | eqcomd 2745 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑠 ∈ ℂ → ((1 / 2)
· 𝑠) = (𝑠 / 2)) |
| 99 | 74, 98 | syl 17 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑠 ∈ ℝ → ((1 / 2)
· 𝑠) = (𝑠 / 2)) |
| 100 | 99 | fveq2d 6831 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑠 ∈ ℝ →
(sin‘((1 / 2) · 𝑠)) = (sin‘(𝑠 / 2))) |
| 101 | 100 | oveq2d 7372 |
. . . . . . . . . . . . . . . 16
⊢ (𝑠 ∈ ℝ → (2
· (sin‘((1 / 2) · 𝑠))) = (2 · (sin‘(𝑠 / 2)))) |
| 102 | 101 | mpteq2ia 5167 |
. . . . . . . . . . . . . . 15
⊢ (𝑠 ∈ ℝ ↦ (2
· (sin‘((1 / 2) · 𝑠)))) = (𝑠 ∈ ℝ ↦ (2 ·
(sin‘(𝑠 /
2)))) |
| 103 | 93, 102 | eqtr2i 2763 |
. . . . . . . . . . . . . 14
⊢ (𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2)))) = ((𝑠 ∈ ℂ
↦ (2 · (sin‘((1 / 2) · 𝑠)))) ↾ ℝ) |
| 104 | 103 | oveq2i 7367 |
. . . . . . . . . . . . 13
⊢ (ℝ
D (𝑠 ∈ ℝ ↦
(2 · (sin‘(𝑠 /
2))))) = (ℝ D ((𝑠
∈ ℂ ↦ (2 · (sin‘((1 / 2) · 𝑠)))) ↾
ℝ)) |
| 105 | | eqid 2739 |
. . . . . . . . . . . . . . 15
⊢ (𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠)))) = (𝑠 ∈ ℂ ↦ (2 ·
(sin‘((1 / 2) · 𝑠)))) |
| 106 | | halfcn 12382 |
. . . . . . . . . . . . . . . . . . 19
⊢ (1 / 2)
∈ ℂ |
| 107 | 106 | a1i 11 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑠 ∈ ℂ → (1 / 2)
∈ ℂ) |
| 108 | 107, 94 | mulcld 11156 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑠 ∈ ℂ → ((1 / 2)
· 𝑠) ∈
ℂ) |
| 109 | 108 | sincld 16088 |
. . . . . . . . . . . . . . . 16
⊢ (𝑠 ∈ ℂ →
(sin‘((1 / 2) · 𝑠)) ∈ ℂ) |
| 110 | 95, 109 | mulcld 11156 |
. . . . . . . . . . . . . . 15
⊢ (𝑠 ∈ ℂ → (2
· (sin‘((1 / 2) · 𝑠))) ∈ ℂ) |
| 111 | 105, 110 | fmpti 7053 |
. . . . . . . . . . . . . 14
⊢ (𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠)))):ℂ⟶ℂ |
| 112 | | 2cn 12247 |
. . . . . . . . . . . . . . . . . . 19
⊢ 2 ∈
ℂ |
| 113 | | dvasinbx 46363 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((2
∈ ℂ ∧ (1 / 2) ∈ ℂ) → (ℂ D (𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠))))) = (𝑠 ∈ ℂ ↦ ((2 · (1 / 2))
· (cos‘((1 / 2) · 𝑠))))) |
| 114 | 112, 106,
113 | mp2an 698 |
. . . . . . . . . . . . . . . . . 18
⊢ (ℂ
D (𝑠 ∈ ℂ ↦
(2 · (sin‘((1 / 2) · 𝑠))))) = (𝑠 ∈ ℂ ↦ ((2 · (1 / 2))
· (cos‘((1 / 2) · 𝑠)))) |
| 115 | 112, 17 | recidi 11877 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (2
· (1 / 2)) = 1 |
| 116 | 115 | a1i 11 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑠 ∈ ℂ → (2
· (1 / 2)) = 1) |
| 117 | 98 | fveq2d 6831 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑠 ∈ ℂ →
(cos‘((1 / 2) · 𝑠)) = (cos‘(𝑠 / 2))) |
| 118 | 116, 117 | oveq12d 7374 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑠 ∈ ℂ → ((2
· (1 / 2)) · (cos‘((1 / 2) · 𝑠))) = (1 · (cos‘(𝑠 / 2)))) |
| 119 | | halfcl 12394 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑠 ∈ ℂ → (𝑠 / 2) ∈
ℂ) |
| 120 | 119 | coscld 16089 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑠 ∈ ℂ →
(cos‘(𝑠 / 2)) ∈
ℂ) |
| 121 | 120 | mullidd 11154 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑠 ∈ ℂ → (1
· (cos‘(𝑠 /
2))) = (cos‘(𝑠 /
2))) |
| 122 | 118, 121 | eqtrd 2774 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑠 ∈ ℂ → ((2
· (1 / 2)) · (cos‘((1 / 2) · 𝑠))) = (cos‘(𝑠 / 2))) |
| 123 | 122 | mpteq2ia 5167 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑠 ∈ ℂ ↦ ((2
· (1 / 2)) · (cos‘((1 / 2) · 𝑠)))) = (𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) |
| 124 | 114, 123 | eqtri 2762 |
. . . . . . . . . . . . . . . . 17
⊢ (ℂ
D (𝑠 ∈ ℂ ↦
(2 · (sin‘((1 / 2) · 𝑠))))) = (𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) |
| 125 | 124 | dmeqi 5846 |
. . . . . . . . . . . . . . . 16
⊢ dom
(ℂ D (𝑠 ∈
ℂ ↦ (2 · (sin‘((1 / 2) · 𝑠))))) = dom (𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) |
| 126 | | dmmptg 6193 |
. . . . . . . . . . . . . . . . 17
⊢
(∀𝑠 ∈
ℂ (cos‘(𝑠 / 2))
∈ ℂ → dom (𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) =
ℂ) |
| 127 | 126, 120 | mprg 3059 |
. . . . . . . . . . . . . . . 16
⊢ dom
(𝑠 ∈ ℂ ↦
(cos‘(𝑠 / 2))) =
ℂ |
| 128 | 125, 127 | eqtri 2762 |
. . . . . . . . . . . . . . 15
⊢ dom
(ℂ D (𝑠 ∈
ℂ ↦ (2 · (sin‘((1 / 2) · 𝑠))))) = ℂ |
| 129 | 61, 128 | sseqtrri 3964 |
. . . . . . . . . . . . . 14
⊢ ℝ
⊆ dom (ℂ D (𝑠
∈ ℂ ↦ (2 · (sin‘((1 / 2) · 𝑠))))) |
| 130 | | dvres3 25898 |
. . . . . . . . . . . . . 14
⊢
(((ℝ ∈ {ℝ, ℂ} ∧ (𝑠 ∈ ℂ ↦ (2 ·
(sin‘((1 / 2) · 𝑠)))):ℂ⟶ℂ) ∧ (ℂ
⊆ ℂ ∧ ℝ ⊆ dom (ℂ D (𝑠 ∈ ℂ ↦ (2 ·
(sin‘((1 / 2) · 𝑠))))))) → (ℝ D ((𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠)))) ↾ ℝ)) = ((ℂ D (𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠))))) ↾ ℝ)) |
| 131 | 46, 111, 65, 129, 130 | mp4an 699 |
. . . . . . . . . . . . 13
⊢ (ℝ
D ((𝑠 ∈ ℂ
↦ (2 · (sin‘((1 / 2) · 𝑠)))) ↾ ℝ)) = ((ℂ D (𝑠 ∈ ℂ ↦ (2
· (sin‘((1 / 2) · 𝑠))))) ↾ ℝ) |
| 132 | 124 | reseq1i 5927 |
. . . . . . . . . . . . 13
⊢ ((ℂ
D (𝑠 ∈ ℂ ↦
(2 · (sin‘((1 / 2) · 𝑠))))) ↾ ℝ) = ((𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) ↾
ℝ) |
| 133 | 104, 131,
132 | 3eqtri 2766 |
. . . . . . . . . . . 12
⊢ (ℝ
D (𝑠 ∈ ℝ ↦
(2 · (sin‘(𝑠 /
2))))) = ((𝑠 ∈ ℂ
↦ (cos‘(𝑠 /
2))) ↾ ℝ) |
| 134 | 133 | reseq1i 5927 |
. . . . . . . . . . 11
⊢ ((ℝ
D (𝑠 ∈ ℝ ↦
(2 · (sin‘(𝑠 /
2))))) ↾ 𝐴) =
(((𝑠 ∈ ℂ ↦
(cos‘(𝑠 / 2)))
↾ ℝ) ↾ 𝐴) |
| 135 | 134 | a1i 11 |
. . . . . . . . . 10
⊢ (𝜑 → ((ℝ D (𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2))))) ↾ 𝐴) =
(((𝑠 ∈ ℂ ↦
(cos‘(𝑠 / 2)))
↾ ℝ) ↾ 𝐴)) |
| 136 | 37 | resabs1d 5960 |
. . . . . . . . . . 11
⊢ (𝜑 → (((𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) ↾ ℝ) ↾
𝐴) = ((𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) ↾ 𝐴)) |
| 137 | 63 | resmptd 5992 |
. . . . . . . . . . 11
⊢ (𝜑 → ((𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) ↾ 𝐴) = (𝑠 ∈ 𝐴 ↦ (cos‘(𝑠 / 2)))) |
| 138 | 136, 137 | eqtrd 2774 |
. . . . . . . . . 10
⊢ (𝜑 → (((𝑠 ∈ ℂ ↦ (cos‘(𝑠 / 2))) ↾ ℝ) ↾
𝐴) = (𝑠 ∈ 𝐴 ↦ (cos‘(𝑠 / 2)))) |
| 139 | 91, 135, 138 | 3eqtrd 2778 |
. . . . . . . . 9
⊢ (𝜑 → ((ℝ D (𝑠 ∈ ℝ ↦ (2
· (sin‘(𝑠 /
2))))) ↾ ((int‘(topGen‘ran (,)))‘𝐴)) = (𝑠 ∈ 𝐴 ↦ (cos‘(𝑠 / 2)))) |
| 140 | 71, 84, 139 | 3eqtrd 2778 |
. . . . . . . 8
⊢ (𝜑 → (ℝ D (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))) = (𝑠 ∈ 𝐴 ↦ (cos‘(𝑠 / 2)))) |
| 141 | | coscn 26428 |
. . . . . . . . . 10
⊢ cos
∈ (ℂ–cn→ℂ) |
| 142 | 141 | a1i 11 |
. . . . . . . . 9
⊢ (𝜑 → cos ∈
(ℂ–cn→ℂ)) |
| 143 | 63, 66 | idcncfg 46316 |
. . . . . . . . . 10
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ 𝑠) ∈ (𝐴–cn→ℂ)) |
| 144 | | 2cnd 12250 |
. . . . . . . . . . . 12
⊢ (𝜑 → 2 ∈
ℂ) |
| 145 | 17 | a1i 11 |
. . . . . . . . . . . 12
⊢ (𝜑 → 2 ≠ 0) |
| 146 | | eldifsn 4719 |
. . . . . . . . . . . 12
⊢ (2 ∈
(ℂ ∖ {0}) ↔ (2 ∈ ℂ ∧ 2 ≠
0)) |
| 147 | 144, 145,
146 | sylanbrc 589 |
. . . . . . . . . . 11
⊢ (𝜑 → 2 ∈ (ℂ ∖
{0})) |
| 148 | | difssd 4067 |
. . . . . . . . . . 11
⊢ (𝜑 → (ℂ ∖ {0})
⊆ ℂ) |
| 149 | 63, 147, 148 | constcncfg 46315 |
. . . . . . . . . 10
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ 2) ∈ (𝐴–cn→(ℂ ∖ {0}))) |
| 150 | 143, 149 | divcncf 25432 |
. . . . . . . . 9
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ (𝑠 / 2)) ∈ (𝐴–cn→ℂ)) |
| 151 | 142, 150 | cncfmpt1f 24899 |
. . . . . . . 8
⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ (cos‘(𝑠 / 2))) ∈ (𝐴–cn→ℂ)) |
| 152 | 140, 151 | eqeltrd 2839 |
. . . . . . 7
⊢ (𝜑 → (ℝ D (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2))))) ∈ (𝐴–cn→ℂ)) |
| 153 | 47, 49, 57, 68, 152 | dvdivcncf 46370 |
. . . . . 6
⊢ (𝜑 → (ℝ D ((𝑠 ∈ 𝐴 ↦ 𝑠) ∘f / (𝑠 ∈ 𝐴 ↦ (2 · (sin‘(𝑠 / 2)))))) ∈ (𝐴–cn→ℂ)) |
| 154 | 45, 153 | eqeltrd 2839 |
. . . . 5
⊢ (𝜑 → (ℝ D 𝐾) ∈ (𝐴–cn→ℂ)) |
| 155 | | cncff 24878 |
. . . . 5
⊢ ((ℝ
D 𝐾) ∈ (𝐴–cn→ℂ) → (ℝ D 𝐾):𝐴⟶ℂ) |
| 156 | | fdm 6664 |
. . . . 5
⊢ ((ℝ
D 𝐾):𝐴⟶ℂ → dom (ℝ D 𝐾) = 𝐴) |
| 157 | 154, 155,
156 | 3syl 18 |
. . . 4
⊢ (𝜑 → dom (ℝ D 𝐾) = 𝐴) |
| 158 | 157 | feq2d 6639 |
. . 3
⊢ (𝜑 → ((ℝ D 𝐾):dom (ℝ D 𝐾)⟶ℝ ↔ (ℝ
D 𝐾):𝐴⟶ℝ)) |
| 159 | 39, 158 | mpbid 233 |
. 2
⊢ (𝜑 → (ℝ D 𝐾):𝐴⟶ℝ) |
| 160 | | cncfcdm 24883 |
. . 3
⊢ ((ℝ
⊆ ℂ ∧ (ℝ D 𝐾) ∈ (𝐴–cn→ℂ)) → ((ℝ D 𝐾) ∈ (𝐴–cn→ℝ) ↔ (ℝ D 𝐾):𝐴⟶ℝ)) |
| 161 | 62, 154, 160 | syl2anc 590 |
. 2
⊢ (𝜑 → ((ℝ D 𝐾) ∈ (𝐴–cn→ℝ) ↔ (ℝ D 𝐾):𝐴⟶ℝ)) |
| 162 | 159, 161 | mpbird 258 |
1
⊢ (𝜑 → (ℝ D 𝐾) ∈ (𝐴–cn→ℝ)) |