Theorem fourierdlem112 42552

Description: Here abbreviations (local definitions) are introduced to prove the fourier 42559 theorem. (𝑍‘𝑚) is the m_th partial sum of the fourier series. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

Hypotheses

Ref	Expression
fourierdlem112.f	⊢ (𝜑 → 𝐹:ℝ⟶ℝ)
fourierdlem112.d	⊢ 𝐷 = (𝑚 ∈ ℕ ↦ (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))))
fourierdlem112.p	⊢ 𝑃 = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})
fourierdlem112.m	⊢ (𝜑 → 𝑀 ∈ ℕ)
fourierdlem112.q	⊢ (𝜑 → 𝑄 ∈ (𝑃‘𝑀))
fourierdlem112.n	⊢ 𝑁 = ((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)
fourierdlem112.v	⊢ 𝑉 = (℩𝑓𝑓 Isom < , < ((0...𝑁), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
fourierdlem112.x	⊢ (𝜑 → 𝑋 ∈ ℝ)
fourierdlem112.xran	⊢ (𝜑 → 𝑋 ∈ ran 𝑉)
fourierdlem112.t	⊢ 𝑇 = (2 · π)
fourierdlem112.fper	⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹‘𝑥))
fourierdlem112.fcn	⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
fourierdlem112.c	⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)))
fourierdlem112.u	⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))))
fourierdlem112.fdvcn	⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
fourierdlem112.e	⊢ (𝜑 → 𝐸 ∈ (((ℝ D 𝐹) ↾ (-∞(,)𝑋)) limℂ 𝑋))
fourierdlem112.i	⊢ (𝜑 → 𝐼 ∈ (((ℝ D 𝐹) ↾ (𝑋(,)+∞)) limℂ 𝑋))
fourierdlem112.l	⊢ (𝜑 → 𝐿 ∈ ((𝐹 ↾ (-∞(,)𝑋)) limℂ 𝑋))
fourierdlem112.r	⊢ (𝜑 → 𝑅 ∈ ((𝐹 ↾ (𝑋(,)+∞)) limℂ 𝑋))
fourierdlem112.a	⊢ 𝐴 = (𝑛 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π))
fourierdlem112.b	⊢ 𝐵 = (𝑛 ∈ ℕ ↦ (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 / π))
fourierdlem112.z	⊢ 𝑍 = (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
fourierdlem112.23	⊢ 𝑆 = (𝑛 ∈ ℕ ↦ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
fourierdlem112.fbd	⊢ (𝜑 → ∃𝑤 ∈ ℝ ∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤)
fourierdlem112.fdvbd	⊢ (𝜑 → ∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
fourierdlem112.25	⊢ (𝜑 → 𝑋 ∈ ℝ)

Assertion

Ref	Expression
fourierdlem112	⊢ (𝜑 → (seq1( + , 𝑆) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)) ∧ (((𝐴‘0) / 2) + Σ𝑛 ∈ ℕ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = ((𝐿 + 𝑅) / 2)))

Distinct variable groups:   𝐴,𝑘,𝑚,𝑛   𝐵,𝑘,𝑚,𝑛   𝑡,𝐶,𝑚   𝑥,𝐶,𝑚   𝐷,𝑖,𝑘,𝑚,𝑛,𝑥,𝑦   𝑖,𝐹,𝑡,𝑧   𝑦,𝐹,𝑡,𝑘,𝑚   𝑧,𝑘,𝑚   𝑛,𝐹   𝑤,𝐹,𝑖,𝑡,𝑧   𝑥,𝐹   𝑖,𝐿,𝑡,𝑧,𝑘,𝑚   𝑛,𝐿   𝑤,𝐿   𝑓,𝑀,𝑖,𝑡,𝑦,𝑚   𝑛,𝑀,𝑥   𝑀,𝑝,𝑖,𝑛,𝑦   𝑖,𝑁,𝑡,𝑤,𝑧   𝑓,𝑁,𝑦,𝑚   𝑛,𝑁,𝑝   𝑥,𝑁,𝑓   𝑄,𝑓,𝑖,𝑡,𝑦,𝑘,𝑚   𝑄,𝑛,𝑥   𝑄,𝑝,𝑘   𝑅,𝑖,𝑡,𝑧,𝑘,𝑚   𝑅,𝑛   𝑤,𝑅   𝑇,𝑓,𝑡,𝑦,𝑖,𝑘,𝑚   𝑇,𝑛,𝑥   𝑇,𝑝   𝑡,𝑈,𝑚   𝑥,𝑈   𝑖,𝑉,𝑡,𝑤,𝑧   𝑓,𝑉,𝑘,𝑚   𝑛,𝑉,𝑝   𝑥,𝑉   𝑖,𝑋,𝑡,𝑧   𝑓,𝑋,𝑦,𝑘,𝑚   𝑛,𝑋,𝑝   𝑤,𝑋   𝑥,𝑋   𝑚,𝑍   𝜑,𝑖,𝑡,𝑤,𝑧   𝜑,𝑓,𝑘,𝑚,𝑦   𝜑,𝑛   𝑤,𝑚   𝜑,𝑥

Allowed substitution hints:   𝜑(𝑝)   𝐴(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑝)   𝐵(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑝)   𝐶(𝑦,𝑧,𝑤,𝑓,𝑖,𝑘,𝑛,𝑝)   𝐷(𝑧,𝑤,𝑡,𝑓,𝑝)   𝑃(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑘,𝑚,𝑛,𝑝)   𝑄(𝑧,𝑤)   𝑅(𝑥,𝑦,𝑓,𝑝)   𝑆(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑘,𝑚,𝑛,𝑝)   𝑇(𝑧,𝑤)   𝑈(𝑦,𝑧,𝑤,𝑓,𝑖,𝑘,𝑛,𝑝)   𝐸(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑘,𝑚,𝑛,𝑝)   𝐹(𝑓,𝑝)   𝐼(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑘,𝑚,𝑛,𝑝)   𝐿(𝑥,𝑦,𝑓,𝑝)   𝑀(𝑧,𝑤,𝑘)   𝑁(𝑘)   𝑉(𝑦)   𝑍(𝑥,𝑦,𝑧,𝑤,𝑡,𝑓,𝑖,𝑘,𝑛,𝑝)

Proof of Theorem fourierdlem112

Dummy variables 𝑗 𝑙 𝑎 𝑠 𝑏 𝑒 𝑔 𝑐 𝑢 𝑞 𝑟 𝑣 ℎ 𝑑 𝑜 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fourierdlem112.23	. . . . 5 ⊢ 𝑆 = (𝑛 ∈ ℕ ↦ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
2		fveq2 6670	. . . . . . . 8 ⊢ (𝑛 = 𝑗 → (𝐴‘𝑛) = (𝐴‘𝑗))
3		oveq1 7163	. . . . . . . . 9 ⊢ (𝑛 = 𝑗 → (𝑛 · 𝑋) = (𝑗 · 𝑋))
4	3	fveq2d 6674	. . . . . . . 8 ⊢ (𝑛 = 𝑗 → (cos‘(𝑛 · 𝑋)) = (cos‘(𝑗 · 𝑋)))
5	2, 4	oveq12d 7174	. . . . . . 7 ⊢ (𝑛 = 𝑗 → ((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) = ((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))))
6		fveq2 6670	. . . . . . . 8 ⊢ (𝑛 = 𝑗 → (𝐵‘𝑛) = (𝐵‘𝑗))
7	3	fveq2d 6674	. . . . . . . 8 ⊢ (𝑛 = 𝑗 → (sin‘(𝑛 · 𝑋)) = (sin‘(𝑗 · 𝑋)))
8	6, 7	oveq12d 7174	. . . . . . 7 ⊢ (𝑛 = 𝑗 → ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))) = ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))
9	5, 8	oveq12d 7174	. . . . . 6 ⊢ (𝑛 = 𝑗 → (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) = (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))
10	9	cbvmptv 5169	. . . . 5 ⊢ (𝑛 ∈ ℕ ↦ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))
11	1, 10	eqtri 2844	. . . 4 ⊢ 𝑆 = (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))
12		seqeq3 13375	. . . 4 ⊢ (𝑆 = (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))) → seq1( + , 𝑆) = seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))))
13	11, 12	mp1i 13	. . 3 ⊢ (𝜑 → seq1( + , 𝑆) = seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))))
14		nnuz 12282	. . . . 5 ⊢ ℕ = (ℤ≥‘1)
15		1zzd 12014	. . . . 5 ⊢ (𝜑 → 1 ∈ ℤ)
16		nfv 1915	. . . . . . 7 ⊢ Ⅎ𝑛𝜑
17		nfcv 2977	. . . . . . . 8 ⊢ Ⅎ𝑛ℕ
18		nfcv 2977	. . . . . . . . 9 ⊢ Ⅎ𝑛(-π(,)0)
19		nfcv 2977	. . . . . . . . . 10 ⊢ Ⅎ𝑛(𝐹‘(𝑋 + 𝑠))
20		nfcv 2977	. . . . . . . . . 10 ⊢ Ⅎ𝑛 ·
21		nfcv 2977	. . . . . . . . . 10 ⊢ Ⅎ𝑛((𝐷‘𝑚)‘𝑠)
22	19, 20, 21	nfov 7186	. . . . . . . . 9 ⊢ Ⅎ𝑛((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠))
23	18, 22	nfitg 24375	. . . . . . . 8 ⊢ Ⅎ𝑛∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠
24	17, 23	nfmpt 5163	. . . . . . 7 ⊢ Ⅎ𝑛(𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)
25		nfcv 2977	. . . . . . . . 9 ⊢ Ⅎ𝑛(0(,)π)
26	25, 22	nfitg 24375	. . . . . . . 8 ⊢ Ⅎ𝑛∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠
27	17, 26	nfmpt 5163	. . . . . . 7 ⊢ Ⅎ𝑛(𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)
28		fourierdlem112.z	. . . . . . . 8 ⊢ 𝑍 = (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
29		fourierdlem112.a	. . . . . . . . . . . . 13 ⊢ 𝐴 = (𝑛 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π))
30		nfmpt1 5164	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑛(𝑛 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π))
31	29, 30	nfcxfr 2975	. . . . . . . . . . . 12 ⊢ Ⅎ𝑛𝐴
32		nfcv 2977	. . . . . . . . . . . 12 ⊢ Ⅎ𝑛0
33	31, 32	nffv 6680	. . . . . . . . . . 11 ⊢ Ⅎ𝑛(𝐴‘0)
34		nfcv 2977	. . . . . . . . . . 11 ⊢ Ⅎ𝑛 /
35		nfcv 2977	. . . . . . . . . . 11 ⊢ Ⅎ𝑛2
36	33, 34, 35	nfov 7186	. . . . . . . . . 10 ⊢ Ⅎ𝑛((𝐴‘0) / 2)
37		nfcv 2977	. . . . . . . . . 10 ⊢ Ⅎ𝑛 +
38		nfcv 2977	. . . . . . . . . . 11 ⊢ Ⅎ𝑛(1...𝑚)
39	38	nfsum1 15046	. . . . . . . . . 10 ⊢ Ⅎ𝑛Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))
40	36, 37, 39	nfov 7186	. . . . . . . . 9 ⊢ Ⅎ𝑛(((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
41	17, 40	nfmpt 5163	. . . . . . . 8 ⊢ Ⅎ𝑛(𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
42	28, 41	nfcxfr 2975	. . . . . . 7 ⊢ Ⅎ𝑛𝑍
43		fourierdlem112.f	. . . . . . . 8 ⊢ (𝜑 → 𝐹:ℝ⟶ℝ)
44		fourierdlem112.25	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ ℝ)
45		eqid 2821	. . . . . . . 8 ⊢ (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π + 𝑋) ∧ (𝑝‘𝑛) = (π + 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))}) = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π + 𝑋) ∧ (𝑝‘𝑛) = (π + 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})
46		picn 25045	. . . . . . . . . . . . 13 ⊢ π ∈ ℂ
47	46	2timesi 11776	. . . . . . . . . . . 12 ⊢ (2 · π) = (π + π)
48		fourierdlem112.t	. . . . . . . . . . . 12 ⊢ 𝑇 = (2 · π)
49	46, 46	subnegi 10965	. . . . . . . . . . . 12 ⊢ (π − -π) = (π + π)
50	47, 48, 49	3eqtr4i 2854	. . . . . . . . . . 11 ⊢ 𝑇 = (π − -π)
51		fourierdlem112.p	. . . . . . . . . . 11 ⊢ 𝑃 = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})
52		fourierdlem112.m	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑀 ∈ ℕ)
53		fourierdlem112.q	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑄 ∈ (𝑃‘𝑀))
54		pire 25044	. . . . . . . . . . . . . 14 ⊢ π ∈ ℝ
55	54	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → π ∈ ℝ)
56	55	renegcld 11067	. . . . . . . . . . . 12 ⊢ (𝜑 → -π ∈ ℝ)
57	56, 44	readdcld 10670	. . . . . . . . . . 11 ⊢ (𝜑 → (-π + 𝑋) ∈ ℝ)
58	55, 44	readdcld 10670	. . . . . . . . . . 11 ⊢ (𝜑 → (π + 𝑋) ∈ ℝ)
59		negpilt0 41595	. . . . . . . . . . . . . 14 ⊢ -π < 0
60		pipos 25046	. . . . . . . . . . . . . 14 ⊢ 0 < π
61	54	renegcli 10947	. . . . . . . . . . . . . . 15 ⊢ -π ∈ ℝ
62		0re 10643	. . . . . . . . . . . . . . 15 ⊢ 0 ∈ ℝ
63	61, 62, 54	lttri 10766	. . . . . . . . . . . . . 14 ⊢ ((-π < 0 ∧ 0 < π) → -π < π)
64	59, 60, 63	mp2an 690	. . . . . . . . . . . . 13 ⊢ -π < π
65	64	a1i 11	. . . . . . . . . . . 12 ⊢ (𝜑 → -π < π)
66	56, 55, 44, 65	ltadd1dd 11251	. . . . . . . . . . 11 ⊢ (𝜑 → (-π + 𝑋) < (π + 𝑋))
67		oveq1 7163	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑥 → (𝑦 + (𝑘 · 𝑇)) = (𝑥 + (𝑘 · 𝑇)))
68	67	eleq1d 2897	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑥 → ((𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ (𝑥 + (𝑘 · 𝑇)) ∈ ran 𝑄))
69	68	rexbidv 3297	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑥 → (∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑘 ∈ ℤ (𝑥 + (𝑘 · 𝑇)) ∈ ran 𝑄))
70	69	cbvrabv 3491	. . . . . . . . . . . 12 ⊢ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑥 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑥 + (𝑘 · 𝑇)) ∈ ran 𝑄}
71	70	uneq2i 4136	. . . . . . . . . . 11 ⊢ ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑥 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑥 + (𝑘 · 𝑇)) ∈ ran 𝑄})
72		fourierdlem112.n	. . . . . . . . . . 11 ⊢ 𝑁 = ((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)
73		fourierdlem112.v	. . . . . . . . . . 11 ⊢ 𝑉 = (℩𝑓𝑓 Isom < , < ((0...𝑁), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
74	50, 51, 52, 53, 57, 58, 66, 45, 71, 72, 73	fourierdlem54 42494	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑁 ∈ ℕ ∧ 𝑉 ∈ ((𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π + 𝑋) ∧ (𝑝‘𝑛) = (π + 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})‘𝑁)) ∧ 𝑉 Isom < , < ((0...𝑁), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}))))
75	74	simpld 497	. . . . . . . . 9 ⊢ (𝜑 → (𝑁 ∈ ℕ ∧ 𝑉 ∈ ((𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π + 𝑋) ∧ (𝑝‘𝑛) = (π + 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})‘𝑁)))
76	75	simpld 497	. . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ ℕ)
77	75	simprd 498	. . . . . . . 8 ⊢ (𝜑 → 𝑉 ∈ ((𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π + 𝑋) ∧ (𝑝‘𝑛) = (π + 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})‘𝑁))
78		fourierdlem112.xran	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ ran 𝑉)
79	43	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → 𝐹:ℝ⟶ℝ)
80		fveq2 6670	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = 𝑗 → (𝑝‘𝑖) = (𝑝‘𝑗))
81		oveq1 7163	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 = 𝑗 → (𝑖 + 1) = (𝑗 + 1))
82	81	fveq2d 6674	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = 𝑗 → (𝑝‘(𝑖 + 1)) = (𝑝‘(𝑗 + 1)))
83	80, 82	breq12d 5079	. . . . . . . . . . . . . . 15 ⊢ (𝑖 = 𝑗 → ((𝑝‘𝑖) < (𝑝‘(𝑖 + 1)) ↔ (𝑝‘𝑗) < (𝑝‘(𝑗 + 1))))
84	83	cbvralvw 3449	. . . . . . . . . . . . . 14 ⊢ (∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)) ↔ ∀𝑗 ∈ (0..^𝑛)(𝑝‘𝑗) < (𝑝‘(𝑗 + 1)))
85	84	anbi2i 624	. . . . . . . . . . . . 13 ⊢ ((((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1))) ↔ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑗 ∈ (0..^𝑛)(𝑝‘𝑗) < (𝑝‘(𝑗 + 1))))
86	85	a1i 11	. . . . . . . . . . . 12 ⊢ (𝑝 ∈ (ℝ ↑m (0...𝑛)) → ((((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1))) ↔ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑗 ∈ (0..^𝑛)(𝑝‘𝑗) < (𝑝‘(𝑗 + 1)))))
87	86	rabbiia 3472	. . . . . . . . . . 11 ⊢ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))} = {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑗 ∈ (0..^𝑛)(𝑝‘𝑗) < (𝑝‘(𝑗 + 1)))}
88	87	mpteq2i 5158	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))}) = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑗 ∈ (0..^𝑛)(𝑝‘𝑗) < (𝑝‘(𝑗 + 1)))})
89	51, 88	eqtri 2844	. . . . . . . . 9 ⊢ 𝑃 = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝‘𝑛) = π) ∧ ∀𝑗 ∈ (0..^𝑛)(𝑝‘𝑗) < (𝑝‘(𝑗 + 1)))})
90	52	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → 𝑀 ∈ ℕ)
91	53	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → 𝑄 ∈ (𝑃‘𝑀))
92		fourierdlem112.fper	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹‘𝑥))
93	92	adantlr 713	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹‘𝑥))
94		eleq1w 2895	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → (𝑖 ∈ (0..^𝑀) ↔ 𝑗 ∈ (0..^𝑀)))
95	94	anbi2d 630	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) ↔ (𝜑 ∧ 𝑗 ∈ (0..^𝑀))))
96		fveq2 6670	. . . . . . . . . . . . . . 15 ⊢ (𝑖 = 𝑗 → (𝑄‘𝑖) = (𝑄‘𝑗))
97	81	fveq2d 6674	. . . . . . . . . . . . . . 15 ⊢ (𝑖 = 𝑗 → (𝑄‘(𝑖 + 1)) = (𝑄‘(𝑗 + 1)))
98	96, 97	oveq12d 7174	. . . . . . . . . . . . . 14 ⊢ (𝑖 = 𝑗 → ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1))) = ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1))))
99	98	reseq2d 5853	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) = (𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))))
100	98	oveq1d 7171	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ) = (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))
101	99, 100	eleq12d 2907	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ) ↔ (𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ)))
102	95, 101	imbi12d 347	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → (((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ)) ↔ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))))
103		fourierdlem112.fcn	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
104	102, 103	chvarvv 2005	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))
105	104	adantlr 713	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑗 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))
106	57	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (-π + 𝑋) ∈ ℝ)
107	57	rexrd 10691	. . . . . . . . . . 11 ⊢ (𝜑 → (-π + 𝑋) ∈ ℝ*)
108		pnfxr 10695	. . . . . . . . . . . 12 ⊢ +∞ ∈ ℝ*
109	108	a1i 11	. . . . . . . . . . 11 ⊢ (𝜑 → +∞ ∈ ℝ*)
110	58	ltpnfd 12517	. . . . . . . . . . 11 ⊢ (𝜑 → (π + 𝑋) < +∞)
111	107, 109, 58, 66, 110	eliood 41822	. . . . . . . . . 10 ⊢ (𝜑 → (π + 𝑋) ∈ ((-π + 𝑋)(,)+∞))
112	111	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (π + 𝑋) ∈ ((-π + 𝑋)(,)+∞))
113		id 22	. . . . . . . . . . 11 ⊢ (𝑖 ∈ (0..^𝑁) → 𝑖 ∈ (0..^𝑁))
114	72	oveq2i 7167	. . . . . . . . . . 11 ⊢ (0..^𝑁) = (0..^((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1))
115	113, 114	eleqtrdi 2923	. . . . . . . . . 10 ⊢ (𝑖 ∈ (0..^𝑁) → 𝑖 ∈ (0..^((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)))
116	115	adantl 484	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → 𝑖 ∈ (0..^((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)))
117	72	oveq2i 7167	. . . . . . . . . . . 12 ⊢ (0...𝑁) = (0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1))
118		isoeq4 7073	. . . . . . . . . . . 12 ⊢ ((0...𝑁) = (0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)) → (𝑓 Isom < , < ((0...𝑁), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}))))
119	117, 118	ax-mp 5	. . . . . . . . . . 11 ⊢ (𝑓 Isom < , < ((0...𝑁), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
120	119	iotabii 6340	. . . . . . . . . 10 ⊢ (℩𝑓𝑓 Isom < , < ((0...𝑁), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}))) = (℩𝑓𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
121	73, 120	eqtri 2844	. . . . . . . . 9 ⊢ 𝑉 = (℩𝑓𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
122	79, 89, 50, 90, 91, 93, 105, 106, 112, 116, 121	fourierdlem98 42538	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (𝐹 ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℂ))
123		fourierdlem112.fbd	. . . . . . . . . 10 ⊢ (𝜑 → ∃𝑤 ∈ ℝ ∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤)
124	123	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ∃𝑤 ∈ ℝ ∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤)
125		nfra1 3219	. . . . . . . . . . 11 ⊢ Ⅎ𝑡∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤
126		elioore 12769	. . . . . . . . . . . . 13 ⊢ (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → 𝑡 ∈ ℝ)
127		rspa 3206	. . . . . . . . . . . . 13 ⊢ ((∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤 ∧ 𝑡 ∈ ℝ) → (abs‘(𝐹‘𝑡)) ≤ 𝑤)
128	126, 127	sylan2 594	. . . . . . . . . . . 12 ⊢ ((∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤 ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘(𝐹‘𝑡)) ≤ 𝑤)
129	128	ex 415	. . . . . . . . . . 11 ⊢ (∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤 → (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → (abs‘(𝐹‘𝑡)) ≤ 𝑤))
130	125, 129	ralrimi 3216	. . . . . . . . . 10 ⊢ (∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤 → ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(𝐹‘𝑡)) ≤ 𝑤)
131	130	reximi 3243	. . . . . . . . 9 ⊢ (∃𝑤 ∈ ℝ ∀𝑡 ∈ ℝ (abs‘(𝐹‘𝑡)) ≤ 𝑤 → ∃𝑤 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(𝐹‘𝑡)) ≤ 𝑤)
132	124, 131	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ∃𝑤 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(𝐹‘𝑡)) ≤ 𝑤)
133		ssid 3989	. . . . . . . . . . . 12 ⊢ ℝ ⊆ ℝ
134		dvfre 24548	. . . . . . . . . . . 12 ⊢ ((𝐹:ℝ⟶ℝ ∧ ℝ ⊆ ℝ) → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
135	43, 133, 134	sylancl 588	. . . . . . . . . . 11 ⊢ (𝜑 → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
136	135	adantr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
137		eqid 2821	. . . . . . . . . . . . 13 ⊢ (ℝ D 𝐹) = (ℝ D 𝐹)
138	54	a1i 11	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → π ∈ ℝ)
139	61	a1i 11	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → -π ∈ ℝ)
140	98	reseq2d 5853	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 = 𝑗 → ((ℝ D 𝐹) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) = ((ℝ D 𝐹) ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))))
141	140, 100	eleq12d 2907	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = 𝑗 → (((ℝ D 𝐹) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ) ↔ ((ℝ D 𝐹) ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ)))
142	95, 141	imbi12d 347	. . . . . . . . . . . . . . 15 ⊢ (𝑖 = 𝑗 → (((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ)) ↔ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))))
143		fourierdlem112.fdvcn	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
144	142, 143	chvarvv 2005	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))
145	144	adantlr 713	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑗 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) ∈ (((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))–cn→ℂ))
146		fourierdlem112.x	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑋 ∈ ℝ)
147	56, 146	readdcld 10670	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (-π + 𝑋) ∈ ℝ)
148	147	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (-π + 𝑋) ∈ ℝ)
149	147	rexrd 10691	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (-π + 𝑋) ∈ ℝ*)
150	55, 146	readdcld 10670	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (π + 𝑋) ∈ ℝ)
151	56, 55, 146, 65	ltadd1dd 11251	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (-π + 𝑋) < (π + 𝑋))
152	150	ltpnfd 12517	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (π + 𝑋) < +∞)
153	149, 109, 150, 151, 152	eliood 41822	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (π + 𝑋) ∈ ((-π + 𝑋)(,)+∞))
154	153	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (π + 𝑋) ∈ ((-π + 𝑋)(,)+∞))
155		oveq1 7163	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑘 = ℎ → (𝑘 · 𝑇) = (ℎ · 𝑇))
156	155	oveq2d 7172	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑘 = ℎ → (𝑦 + (𝑘 · 𝑇)) = (𝑦 + (ℎ · 𝑇)))
157	156	eleq1d 2897	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑘 = ℎ → ((𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄))
158	157	cbvrexvw 3450	. . . . . . . . . . . . . . . . . . 19 ⊢ (∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄)
159	158	rgenw 3150	. . . . . . . . . . . . . . . . . 18 ⊢ ∀𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋))(∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄)
160		rabbi 3383	. . . . . . . . . . . . . . . . . 18 ⊢ (∀𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋))(∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄) ↔ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄})
161	159, 160	mpbi 232	. . . . . . . . . . . . . . . . 17 ⊢ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}
162	161	uneq2i 4136	. . . . . . . . . . . . . . . 16 ⊢ ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄})
163		isoeq5 7074	. . . . . . . . . . . . . . . 16 ⊢ (({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}) → (𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}))))
164	162, 163	ax-mp 5	. . . . . . . . . . . . . . 15 ⊢ (𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄})))
165	164	iotabii 6340	. . . . . . . . . . . . . 14 ⊢ (℩𝑓𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}))) = (℩𝑓𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄})))
166	121, 165	eqtri 2844	. . . . . . . . . . . . 13 ⊢ 𝑉 = (℩𝑓𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄})))
167		eleq1w 2895	. . . . . . . . . . . . . . 15 ⊢ (𝑣 = 𝑢 → (𝑣 ∈ dom (ℝ D 𝐹) ↔ 𝑢 ∈ dom (ℝ D 𝐹)))
168		fveq2 6670	. . . . . . . . . . . . . . 15 ⊢ (𝑣 = 𝑢 → ((ℝ D 𝐹)‘𝑣) = ((ℝ D 𝐹)‘𝑢))
169	167, 168	ifbieq1d 4490	. . . . . . . . . . . . . 14 ⊢ (𝑣 = 𝑢 → if(𝑣 ∈ dom (ℝ D 𝐹), ((ℝ D 𝐹)‘𝑣), 0) = if(𝑢 ∈ dom (ℝ D 𝐹), ((ℝ D 𝐹)‘𝑢), 0))
170	169	cbvmptv 5169	. . . . . . . . . . . . 13 ⊢ (𝑣 ∈ ℝ ↦ if(𝑣 ∈ dom (ℝ D 𝐹), ((ℝ D 𝐹)‘𝑣), 0)) = (𝑢 ∈ ℝ ↦ if(𝑢 ∈ dom (ℝ D 𝐹), ((ℝ D 𝐹)‘𝑢), 0))
171	79, 137, 89, 138, 139, 50, 90, 91, 93, 145, 148, 154, 116, 166, 170	fourierdlem97 42537	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℂ))
172		cncff 23501	. . . . . . . . . . . 12 ⊢ (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℂ) → ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))):((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))⟶ℂ)
173		fdm 6522	. . . . . . . . . . . 12 ⊢ (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))):((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))⟶ℂ → dom ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) = ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))
174	171, 172, 173	3syl 18	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → dom ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) = ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))
175		ssdmres 5876	. . . . . . . . . . 11 ⊢ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) ⊆ dom (ℝ D 𝐹) ↔ dom ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) = ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))
176	174, 175	sylibr 236	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) ⊆ dom (ℝ D 𝐹))
177	136, 176	fssresd 6545	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))):((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))⟶ℝ)
178		ax-resscn 10594	. . . . . . . . . . 11 ⊢ ℝ ⊆ ℂ
179	178	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ℝ ⊆ ℂ)
180		cncffvrn 23506	. . . . . . . . . 10 ⊢ ((ℝ ⊆ ℂ ∧ ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℂ)) → (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℝ) ↔ ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))):((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))⟶ℝ))
181	179, 171, 180	syl2anc 586	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℝ) ↔ ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))):((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))⟶ℝ))
182	177, 181	mpbird 259	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℝ))
183		fourierdlem112.fdvbd	. . . . . . . . . . 11 ⊢ (𝜑 → ∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
184	183	adantr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
185		nfv 1915	. . . . . . . . . . . . . 14 ⊢ Ⅎ𝑡(𝜑 ∧ 𝑖 ∈ (0..^𝑁))
186		nfra1 3219	. . . . . . . . . . . . . 14 ⊢ Ⅎ𝑡∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧
187	185, 186	nfan 1900	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑡((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
188		fvres 6689	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡) = ((ℝ D 𝐹)‘𝑡))
189	188	adantl 484	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡) = ((ℝ D 𝐹)‘𝑡))
190	189	fveq2d 6674	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) = (abs‘((ℝ D 𝐹)‘𝑡)))
191	190	adantlr 713	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) = (abs‘((ℝ D 𝐹)‘𝑡)))
192		simplr 767	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
193	176	sselda 3967	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → 𝑡 ∈ dom (ℝ D 𝐹))
194	193	adantlr 713	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → 𝑡 ∈ dom (ℝ D 𝐹))
195		rspa 3206	. . . . . . . . . . . . . . . 16 ⊢ ((∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧 ∧ 𝑡 ∈ dom (ℝ D 𝐹)) → (abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
196	192, 194, 195	syl2anc 586	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
197	191, 196	eqbrtrd 5088	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧)
198	197	ex 415	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) → (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧))
199	187, 198	ralrimi 3216	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) → ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧)
200	199	ex 415	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧 → ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧))
201	200	reximdv 3273	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧 → ∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧))
202	184, 201	mpd 15	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧)
203		nfra1 3219	. . . . . . . . . . . 12 ⊢ Ⅎ𝑡∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧
204	188	eqcomd 2827	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → ((ℝ D 𝐹)‘𝑡) = (((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡))
205	204	fveq2d 6674	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → (abs‘((ℝ D 𝐹)‘𝑡)) = (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)))
206	205	adantl 484	. . . . . . . . . . . . . 14 ⊢ ((∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘((ℝ D 𝐹)‘𝑡)) = (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)))
207		rspa 3206	. . . . . . . . . . . . . 14 ⊢ ((∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧)
208	206, 207	eqbrtrd 5088	. . . . . . . . . . . . 13 ⊢ ((∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 ∧ 𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) → (abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
209	208	ex 415	. . . . . . . . . . . 12 ⊢ (∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 → (𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))) → (abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧))
210	203, 209	ralrimi 3216	. . . . . . . . . . 11 ⊢ (∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 → ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
211	210	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 → ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧))
212	211	reximdv 3273	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → (∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘(((ℝ D 𝐹) ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1))))‘𝑡)) ≤ 𝑧 → ∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧))
213	202, 212	mpd 15	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → ∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
214		nfv 1915	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖(𝜑 ∧ 𝑗 ∈ (0..^𝑀))
215		nfcsb1v 3907	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑖⦋𝑗 / 𝑖⦌𝐶
216	215	nfel1 2994	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖⦋𝑗 / 𝑖⦌𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗))
217	214, 216	nfim 1897	. . . . . . . . . . 11 ⊢ Ⅎ𝑖((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗)))
218		csbeq1a 3897	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → 𝐶 = ⦋𝑗 / 𝑖⦌𝐶)
219	99, 96	oveq12d 7174	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)) = ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗)))
220	218, 219	eleq12d 2907	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → (𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)) ↔ ⦋𝑗 / 𝑖⦌𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗))))
221	95, 220	imbi12d 347	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → (((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖))) ↔ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗)))))
222		fourierdlem112.c	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)))
223	217, 221, 222	chvarfv 2242	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗)))
224	223	adantlr 713	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝐶 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘𝑗)))
225	79, 89, 50, 90, 91, 93, 105, 224, 106, 112, 116, 121	fourierdlem96 42536	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → if(((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘(𝑉‘𝑖))) = (𝑄‘((𝑦 ∈ ℝ ↦ sup({𝑓 ∈ (0..^𝑀) ∣ (𝑄‘𝑓) ≤ ((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖))), ((𝑗 ∈ (0..^𝑀) ↦ ⦋𝑗 / 𝑖⦌𝐶)‘((𝑦 ∈ ℝ ↦ sup({𝑓 ∈ (0..^𝑀) ∣ (𝑄‘𝑓) ≤ ((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖))), (𝐹‘((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘(𝑉‘𝑖))))) ∈ ((𝐹 ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) limℂ (𝑉‘𝑖)))
226		nfcsb1v 3907	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑖⦋𝑗 / 𝑖⦌𝑈
227	226	nfel1 2994	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖⦋𝑗 / 𝑖⦌𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1)))
228	214, 227	nfim 1897	. . . . . . . . . . 11 ⊢ Ⅎ𝑖((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1))))
229		csbeq1a 3897	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → 𝑈 = ⦋𝑗 / 𝑖⦌𝑈)
230	99, 97	oveq12d 7174	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))) = ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1))))
231	229, 230	eleq12d 2907	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → (𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))) ↔ ⦋𝑗 / 𝑖⦌𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1)))))
232	95, 231	imbi12d 347	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → (((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1)))) ↔ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1))))))
233		fourierdlem112.u	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))))
234	228, 232, 233	chvarfv 2242	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1))))
235	234	adantlr 713	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) ∧ 𝑗 ∈ (0..^𝑀)) → ⦋𝑗 / 𝑖⦌𝑈 ∈ ((𝐹 ↾ ((𝑄‘𝑗)(,)(𝑄‘(𝑗 + 1)))) limℂ (𝑄‘(𝑗 + 1))))
236	79, 89, 50, 90, 91, 93, 105, 235, 148, 154, 116, 121	fourierdlem99 42539	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑁)) → if(((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘(𝑉‘(𝑖 + 1))) = (𝑄‘(((𝑦 ∈ ℝ ↦ sup({ℎ ∈ (0..^𝑀) ∣ (𝑄‘ℎ) ≤ ((𝑔 ∈ (-π(,]π) ↦ if(𝑔 = π, -π, 𝑔))‘((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖)) + 1)), ((𝑗 ∈ (0..^𝑀) ↦ ⦋𝑗 / 𝑖⦌𝑈)‘((𝑦 ∈ ℝ ↦ sup({ℎ ∈ (0..^𝑀) ∣ (𝑄‘ℎ) ≤ ((𝑔 ∈ (-π(,]π) ↦ if(𝑔 = π, -π, 𝑔))‘((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖))), (𝐹‘((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘(𝑉‘(𝑖 + 1))))) ∈ ((𝐹 ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) limℂ (𝑉‘(𝑖 + 1))))
237		eqeq1 2825	. . . . . . . . . 10 ⊢ (𝑔 = 𝑠 → (𝑔 = 0 ↔ 𝑠 = 0))
238		oveq2 7164	. . . . . . . . . . . . 13 ⊢ (𝑔 = 𝑠 → (𝑋 + 𝑔) = (𝑋 + 𝑠))
239	238	fveq2d 6674	. . . . . . . . . . . 12 ⊢ (𝑔 = 𝑠 → (𝐹‘(𝑋 + 𝑔)) = (𝐹‘(𝑋 + 𝑠)))
240		breq2 5070	. . . . . . . . . . . . 13 ⊢ (𝑔 = 𝑠 → (0 < 𝑔 ↔ 0 < 𝑠))
241	240	ifbid 4489	. . . . . . . . . . . 12 ⊢ (𝑔 = 𝑠 → if(0 < 𝑔, 𝑅, 𝐿) = if(0 < 𝑠, 𝑅, 𝐿))
242	239, 241	oveq12d 7174	. . . . . . . . . . 11 ⊢ (𝑔 = 𝑠 → ((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) = ((𝐹‘(𝑋 + 𝑠)) − if(0 < 𝑠, 𝑅, 𝐿)))
243		id 22	. . . . . . . . . . 11 ⊢ (𝑔 = 𝑠 → 𝑔 = 𝑠)
244	242, 243	oveq12d 7174	. . . . . . . . . 10 ⊢ (𝑔 = 𝑠 → (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔) = (((𝐹‘(𝑋 + 𝑠)) − if(0 < 𝑠, 𝑅, 𝐿)) / 𝑠))
245	237, 244	ifbieq2d 4492	. . . . . . . . 9 ⊢ (𝑔 = 𝑠 → if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)) = if(𝑠 = 0, 0, (((𝐹‘(𝑋 + 𝑠)) − if(0 < 𝑠, 𝑅, 𝐿)) / 𝑠)))
246	245	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔))) = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 0, (((𝐹‘(𝑋 + 𝑠)) − if(0 < 𝑠, 𝑅, 𝐿)) / 𝑠)))
247		eqeq1 2825	. . . . . . . . . 10 ⊢ (𝑜 = 𝑠 → (𝑜 = 0 ↔ 𝑠 = 0))
248		id 22	. . . . . . . . . . 11 ⊢ (𝑜 = 𝑠 → 𝑜 = 𝑠)
249		oveq1 7163	. . . . . . . . . . . . 13 ⊢ (𝑜 = 𝑠 → (𝑜 / 2) = (𝑠 / 2))
250	249	fveq2d 6674	. . . . . . . . . . . 12 ⊢ (𝑜 = 𝑠 → (sin‘(𝑜 / 2)) = (sin‘(𝑠 / 2)))
251	250	oveq2d 7172	. . . . . . . . . . 11 ⊢ (𝑜 = 𝑠 → (2 · (sin‘(𝑜 / 2))) = (2 · (sin‘(𝑠 / 2))))
252	248, 251	oveq12d 7174	. . . . . . . . . 10 ⊢ (𝑜 = 𝑠 → (𝑜 / (2 · (sin‘(𝑜 / 2)))) = (𝑠 / (2 · (sin‘(𝑠 / 2)))))
253	247, 252	ifbieq2d 4492	. . . . . . . . 9 ⊢ (𝑜 = 𝑠 → if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))) = if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))))
254	253	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2)))))) = (𝑠 ∈ (-π[,]π) ↦ if(𝑠 = 0, 1, (𝑠 / (2 · (sin‘(𝑠 / 2))))))
255		fveq2 6670	. . . . . . . . . 10 ⊢ (𝑟 = 𝑠 → ((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) = ((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑠))
256		fveq2 6670	. . . . . . . . . 10 ⊢ (𝑟 = 𝑠 → ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟) = ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑠))
257	255, 256	oveq12d 7174	. . . . . . . . 9 ⊢ (𝑟 = 𝑠 → (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)) = (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑠) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑠)))
258	257	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟))) = (𝑠 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑠) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑠)))
259		oveq2 7164	. . . . . . . . . 10 ⊢ (𝑑 = 𝑠 → ((𝑘 + (1 / 2)) · 𝑑) = ((𝑘 + (1 / 2)) · 𝑠))
260	259	fveq2d 6674	. . . . . . . . 9 ⊢ (𝑑 = 𝑠 → (sin‘((𝑘 + (1 / 2)) · 𝑑)) = (sin‘((𝑘 + (1 / 2)) · 𝑠)))
261	260	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑))) = (𝑠 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑠)))
262		fveq2 6670	. . . . . . . . . 10 ⊢ (𝑧 = 𝑠 → ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) = ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠))
263		fveq2 6670	. . . . . . . . . 10 ⊢ (𝑧 = 𝑠 → ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧) = ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑠))
264	262, 263	oveq12d 7174	. . . . . . . . 9 ⊢ (𝑧 = 𝑠 → (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)) = (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑠)))
265	264	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧))) = (𝑠 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑠)))
266		fveq2 6670	. . . . . . . . . . . . 13 ⊢ (𝑚 = 𝑛 → (𝐷‘𝑚) = (𝐷‘𝑛))
267	266	fveq1d 6672	. . . . . . . . . . . 12 ⊢ (𝑚 = 𝑛 → ((𝐷‘𝑚)‘𝑠) = ((𝐷‘𝑛)‘𝑠))
268	267	oveq2d 7172	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑛 → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) = ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)))
269	268	adantr 483	. . . . . . . . . 10 ⊢ ((𝑚 = 𝑛 ∧ 𝑠 ∈ (-π(,)0)) → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) = ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)))
270	269	itgeq2dv 24382	. . . . . . . . 9 ⊢ (𝑚 = 𝑛 → ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 = ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
271	270	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) = (𝑛 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
272		oveq1 7163	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑐 = 𝑘 → (𝑐 + (1 / 2)) = (𝑘 + (1 / 2)))
273	272	oveq1d 7171	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑐 = 𝑘 → ((𝑐 + (1 / 2)) · 𝑑) = ((𝑘 + (1 / 2)) · 𝑑))
274	273	fveq2d 6674	. . . . . . . . . . . . . . . . 17 ⊢ (𝑐 = 𝑘 → (sin‘((𝑐 + (1 / 2)) · 𝑑)) = (sin‘((𝑘 + (1 / 2)) · 𝑑)))
275	274	mpteq2dv 5162	. . . . . . . . . . . . . . . 16 ⊢ (𝑐 = 𝑘 → (𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑))) = (𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑))))
276	275	fveq1d 6672	. . . . . . . . . . . . . . 15 ⊢ (𝑐 = 𝑘 → ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧) = ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧))
277	276	oveq2d 7172	. . . . . . . . . . . . . 14 ⊢ (𝑐 = 𝑘 → (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)) = (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))
278	277	mpteq2dv 5162	. . . . . . . . . . . . 13 ⊢ (𝑐 = 𝑘 → (𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧))) = (𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧))))
279	278	fveq1d 6672	. . . . . . . . . . . 12 ⊢ (𝑐 = 𝑘 → ((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) = ((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠))
280	279	adantr 483	. . . . . . . . . . 11 ⊢ ((𝑐 = 𝑘 ∧ 𝑠 ∈ (-π(,)0)) → ((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) = ((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠))
281	280	itgeq2dv 24382	. . . . . . . . . 10 ⊢ (𝑐 = 𝑘 → ∫(-π(,)0)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 = ∫(-π(,)0)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠)
282	281	oveq1d 7171	. . . . . . . . 9 ⊢ (𝑐 = 𝑘 → (∫(-π(,)0)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π) = (∫(-π(,)0)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π))
283	282	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑐 ∈ ℕ ↦ (∫(-π(,)0)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π)) = (𝑘 ∈ ℕ ↦ (∫(-π(,)0)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π))
284		fourierdlem112.r	. . . . . . . 8 ⊢ (𝜑 → 𝑅 ∈ ((𝐹 ↾ (𝑋(,)+∞)) limℂ 𝑋))
285		fourierdlem112.l	. . . . . . . 8 ⊢ (𝜑 → 𝐿 ∈ ((𝐹 ↾ (-∞(,)𝑋)) limℂ 𝑋))
286		fourierdlem112.e	. . . . . . . 8 ⊢ (𝜑 → 𝐸 ∈ (((ℝ D 𝐹) ↾ (-∞(,)𝑋)) limℂ 𝑋))
287		fourierdlem112.i	. . . . . . . 8 ⊢ (𝜑 → 𝐼 ∈ (((ℝ D 𝐹) ↾ (𝑋(,)+∞)) limℂ 𝑋))
288		fourierdlem112.d	. . . . . . . . 9 ⊢ 𝐷 = (𝑚 ∈ ℕ ↦ (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))))
289		oveq1 7163	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑠 → (𝑦 mod (2 · π)) = (𝑠 mod (2 · π)))
290	289	eqeq1d 2823	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑠 → ((𝑦 mod (2 · π)) = 0 ↔ (𝑠 mod (2 · π)) = 0))
291		oveq2 7164	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑠 → ((𝑚 + (1 / 2)) · 𝑦) = ((𝑚 + (1 / 2)) · 𝑠))
292	291	fveq2d 6674	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑠 → (sin‘((𝑚 + (1 / 2)) · 𝑦)) = (sin‘((𝑚 + (1 / 2)) · 𝑠)))
293		oveq1 7163	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = 𝑠 → (𝑦 / 2) = (𝑠 / 2))
294	293	fveq2d 6674	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑠 → (sin‘(𝑦 / 2)) = (sin‘(𝑠 / 2)))
295	294	oveq2d 7172	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑠 → ((2 · π) · (sin‘(𝑦 / 2))) = ((2 · π) · (sin‘(𝑠 / 2))))
296	292, 295	oveq12d 7174	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑠 → ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))) = ((sin‘((𝑚 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))
297	290, 296	ifbieq2d 4492	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑠 → if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2))))) = if((𝑠 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2))))))
298	297	cbvmptv 5169	. . . . . . . . . . 11 ⊢ (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))) = (𝑠 ∈ ℝ ↦ if((𝑠 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2))))))
299		simpl 485	. . . . . . . . . . . . . . . 16 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → 𝑚 = 𝑘)
300	299	oveq2d 7172	. . . . . . . . . . . . . . 15 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → (2 · 𝑚) = (2 · 𝑘))
301	300	oveq1d 7171	. . . . . . . . . . . . . 14 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → ((2 · 𝑚) + 1) = ((2 · 𝑘) + 1))
302	301	oveq1d 7171	. . . . . . . . . . . . 13 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → (((2 · 𝑚) + 1) / (2 · π)) = (((2 · 𝑘) + 1) / (2 · π)))
303	299	oveq1d 7171	. . . . . . . . . . . . . . . 16 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → (𝑚 + (1 / 2)) = (𝑘 + (1 / 2)))
304	303	oveq1d 7171	. . . . . . . . . . . . . . 15 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → ((𝑚 + (1 / 2)) · 𝑠) = ((𝑘 + (1 / 2)) · 𝑠))
305	304	fveq2d 6674	. . . . . . . . . . . . . 14 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → (sin‘((𝑚 + (1 / 2)) · 𝑠)) = (sin‘((𝑘 + (1 / 2)) · 𝑠)))
306	305	oveq1d 7171	. . . . . . . . . . . . 13 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → ((sin‘((𝑚 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))) = ((sin‘((𝑘 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))
307	302, 306	ifeq12d 4487	. . . . . . . . . . . 12 ⊢ ((𝑚 = 𝑘 ∧ 𝑠 ∈ ℝ) → if((𝑠 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2))))) = if((𝑠 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2))))))
308	307	mpteq2dva 5161	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → (𝑠 ∈ ℝ ↦ if((𝑠 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))) = (𝑠 ∈ ℝ ↦ if((𝑠 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))))
309	298, 308	syl5eq 2868	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))) = (𝑠 ∈ ℝ ↦ if((𝑠 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))))
310	309	cbvmptv 5169	. . . . . . . . 9 ⊢ (𝑚 ∈ ℕ ↦ (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2))))))) = (𝑘 ∈ ℕ ↦ (𝑠 ∈ ℝ ↦ if((𝑠 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))))
311	288, 310	eqtri 2844	. . . . . . . 8 ⊢ 𝐷 = (𝑘 ∈ ℕ ↦ (𝑠 ∈ ℝ ↦ if((𝑠 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑠)) / ((2 · π) · (sin‘(𝑠 / 2)))))))
312		eqid 2821	. . . . . . . 8 ⊢ ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟))) ↾ (-π[,]𝑙)) = ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟))) ↾ (-π[,]𝑙))
313		eqid 2821	. . . . . . . 8 ⊢ ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙))) = ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))
314		eqid 2821	. . . . . . . 8 ⊢ ((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1) = ((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)
315		isoeq1 7070	. . . . . . . . 9 ⊢ (𝑢 = 𝑤 → (𝑢 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) ↔ 𝑤 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙))))))
316	315	cbviotavw 6322	. . . . . . . 8 ⊢ (℩𝑢𝑢 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙))))) = (℩𝑤𝑤 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))))
317		fveq2 6670	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝑉‘𝑗) = (𝑉‘𝑖))
318	317	oveq1d 7171	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑉‘𝑗) − 𝑋) = ((𝑉‘𝑖) − 𝑋))
319	318	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) = (𝑖 ∈ (0...𝑁) ↦ ((𝑉‘𝑖) − 𝑋))
320		eqid 2821	. . . . . . . 8 ⊢ (℩𝑚 ∈ (0..^𝑁)(((℩𝑢𝑢 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))))‘𝑏)(,)((℩𝑢𝑢 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))))‘(𝑏 + 1))) ⊆ (((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘𝑚)(,)((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘(𝑚 + 1)))) = (℩𝑚 ∈ (0..^𝑁)(((℩𝑢𝑢 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))))‘𝑏)(,)((℩𝑢𝑢 Isom < , < ((0...((♯‘({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))) − 1)), ({-π, 𝑙} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (-π(,)𝑙)))))‘(𝑏 + 1))) ⊆ (((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘𝑚)(,)((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘(𝑚 + 1))))
321		fveq2 6670	. . . . . . . . . . . . . 14 ⊢ (𝑎 = 𝑠 → ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) = ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠))
322		oveq2 7164	. . . . . . . . . . . . . . 15 ⊢ (𝑎 = 𝑠 → ((𝑏 + (1 / 2)) · 𝑎) = ((𝑏 + (1 / 2)) · 𝑠))
323	322	fveq2d 6674	. . . . . . . . . . . . . 14 ⊢ (𝑎 = 𝑠 → (sin‘((𝑏 + (1 / 2)) · 𝑎)) = (sin‘((𝑏 + (1 / 2)) · 𝑠)))
324	321, 323	oveq12d 7174	. . . . . . . . . . . . 13 ⊢ (𝑎 = 𝑠 → (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) = (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))))
325	324	cbvitgv 24377	. . . . . . . . . . . 12 ⊢ ∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎 = ∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠
326	325	fveq2i 6673	. . . . . . . . . . 11 ⊢ (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) = (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠)
327	326	breq1i 5073	. . . . . . . . . 10 ⊢ ((abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑖 / 2) ↔ (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑖 / 2))
328	327	anbi2i 624	. . . . . . . . 9 ⊢ (((((𝜑 ∧ 𝑖 ∈ ℝ+) ∧ 𝑙 ∈ (-π(,)0)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑖 / 2)) ↔ ((((𝜑 ∧ 𝑖 ∈ ℝ+) ∧ 𝑙 ∈ (-π(,)0)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑖 / 2)))
329	324	cbvitgv 24377	. . . . . . . . . . 11 ⊢ ∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎 = ∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠
330	329	fveq2i 6673	. . . . . . . . . 10 ⊢ (abs‘∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) = (abs‘∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠)
331	330	breq1i 5073	. . . . . . . . 9 ⊢ ((abs‘∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑖 / 2) ↔ (abs‘∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑖 / 2))
332	328, 331	anbi12i 628	. . . . . . . 8 ⊢ ((((((𝜑 ∧ 𝑖 ∈ ℝ+) ∧ 𝑙 ∈ (-π(,)0)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑖 / 2)) ∧ (abs‘∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑖 / 2)) ↔ (((((𝜑 ∧ 𝑖 ∈ ℝ+) ∧ 𝑙 ∈ (-π(,)0)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(𝑙(,)0)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑖 / 2)) ∧ (abs‘∫(-π(,)𝑙)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑖 / 2)))
333	43, 44, 45, 76, 77, 78, 122, 132, 182, 213, 225, 236, 246, 254, 258, 261, 265, 271, 283, 284, 285, 286, 287, 311, 312, 313, 314, 316, 319, 320, 332	fourierdlem103 42543	. . . . . . 7 ⊢ (𝜑 → (𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) ⇝ (𝐿 / 2))
334		nnex 11644	. . . . . . . . . 10 ⊢ ℕ ∈ V
335	334	mptex 6986	. . . . . . . . 9 ⊢ (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))) ∈ V
336	28, 335	eqeltri 2909	. . . . . . . 8 ⊢ 𝑍 ∈ V
337	336	a1i 11	. . . . . . 7 ⊢ (𝜑 → 𝑍 ∈ V)
338	268	adantr 483	. . . . . . . . . 10 ⊢ ((𝑚 = 𝑛 ∧ 𝑠 ∈ (0(,)π)) → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) = ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)))
339	338	itgeq2dv 24382	. . . . . . . . 9 ⊢ (𝑚 = 𝑛 → ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 = ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
340	339	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) = (𝑛 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
341	279	adantr 483	. . . . . . . . . . 11 ⊢ ((𝑐 = 𝑘 ∧ 𝑠 ∈ (0(,)π)) → ((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) = ((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠))
342	341	itgeq2dv 24382	. . . . . . . . . 10 ⊢ (𝑐 = 𝑘 → ∫(0(,)π)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 = ∫(0(,)π)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠)
343	342	oveq1d 7171	. . . . . . . . 9 ⊢ (𝑐 = 𝑘 → (∫(0(,)π)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π) = (∫(0(,)π)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π))
344	343	cbvmptv 5169	. . . . . . . 8 ⊢ (𝑐 ∈ ℕ ↦ (∫(0(,)π)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑐 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π)) = (𝑘 ∈ ℕ ↦ (∫(0(,)π)((𝑧 ∈ (-π[,]π) ↦ (((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑧) · ((𝑑 ∈ (-π[,]π) ↦ (sin‘((𝑘 + (1 / 2)) · 𝑑)))‘𝑧)))‘𝑠) d𝑠 / π))
345		eqid 2821	. . . . . . . 8 ⊢ ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟))) ↾ (𝑒[,]π)) = ((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟))) ↾ (𝑒[,]π))
346		eqid 2821	. . . . . . . 8 ⊢ ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π))) = ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))
347		eqid 2821	. . . . . . . 8 ⊢ ((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1) = ((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)
348		isoeq1 7070	. . . . . . . . 9 ⊢ (𝑢 = 𝑣 → (𝑢 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) ↔ 𝑣 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π))))))
349	348	cbviotavw 6322	. . . . . . . 8 ⊢ (℩𝑢𝑢 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π))))) = (℩𝑣𝑣 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))))
350		eqid 2821	. . . . . . . 8 ⊢ (℩𝑎 ∈ (0..^𝑁)(((℩𝑢𝑢 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))))‘𝑏)(,)((℩𝑢𝑢 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))))‘(𝑏 + 1))) ⊆ (((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘𝑎)(,)((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘(𝑎 + 1)))) = (℩𝑎 ∈ (0..^𝑁)(((℩𝑢𝑢 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))))‘𝑏)(,)((℩𝑢𝑢 Isom < , < ((0...((♯‘({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))) − 1)), ({𝑒, π} ∪ (ran (𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋)) ∩ (𝑒(,)π)))))‘(𝑏 + 1))) ⊆ (((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘𝑎)(,)((𝑗 ∈ (0...𝑁) ↦ ((𝑉‘𝑗) − 𝑋))‘(𝑎 + 1))))
351	324	cbvitgv 24377	. . . . . . . . . . . 12 ⊢ ∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎 = ∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠
352	351	fveq2i 6673	. . . . . . . . . . 11 ⊢ (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) = (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠)
353	352	breq1i 5073	. . . . . . . . . 10 ⊢ ((abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑞 / 2) ↔ (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑞 / 2))
354	353	anbi2i 624	. . . . . . . . 9 ⊢ (((((𝜑 ∧ 𝑞 ∈ ℝ+) ∧ 𝑒 ∈ (0(,)π)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑞 / 2)) ↔ ((((𝜑 ∧ 𝑞 ∈ ℝ+) ∧ 𝑒 ∈ (0(,)π)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑞 / 2)))
355	324	cbvitgv 24377	. . . . . . . . . . 11 ⊢ ∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎 = ∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠
356	355	fveq2i 6673	. . . . . . . . . 10 ⊢ (abs‘∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) = (abs‘∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠)
357	356	breq1i 5073	. . . . . . . . 9 ⊢ ((abs‘∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑞 / 2) ↔ (abs‘∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑞 / 2))
358	354, 357	anbi12i 628	. . . . . . . 8 ⊢ ((((((𝜑 ∧ 𝑞 ∈ ℝ+) ∧ 𝑒 ∈ (0(,)π)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑞 / 2)) ∧ (abs‘∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑎) · (sin‘((𝑏 + (1 / 2)) · 𝑎))) d𝑎) < (𝑞 / 2)) ↔ (((((𝜑 ∧ 𝑞 ∈ ℝ+) ∧ 𝑒 ∈ (0(,)π)) ∧ 𝑏 ∈ ℕ) ∧ (abs‘∫(0(,)𝑒)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑞 / 2)) ∧ (abs‘∫(𝑒(,)π)(((𝑟 ∈ (-π[,]π) ↦ (((𝑔 ∈ (-π[,]π) ↦ if(𝑔 = 0, 0, (((𝐹‘(𝑋 + 𝑔)) − if(0 < 𝑔, 𝑅, 𝐿)) / 𝑔)))‘𝑟) · ((𝑜 ∈ (-π[,]π) ↦ if(𝑜 = 0, 1, (𝑜 / (2 · (sin‘(𝑜 / 2))))))‘𝑟)))‘𝑠) · (sin‘((𝑏 + (1 / 2)) · 𝑠))) d𝑠) < (𝑞 / 2)))
359	43, 44, 45, 76, 77, 78, 122, 132, 182, 213, 225, 236, 246, 254, 258, 261, 265, 340, 344, 284, 285, 286, 287, 311, 345, 346, 347, 349, 319, 350, 358	fourierdlem104 42544	. . . . . . 7 ⊢ (𝜑 → (𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) ⇝ (𝑅 / 2))
360		eqidd 2822	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) = (𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠))
361	270	adantl 484	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑚 = 𝑛) → ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 = ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
362		simpr 487	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑛 ∈ ℕ)
363		elioore 12769	. . . . . . . . . . 11 ⊢ (𝑠 ∈ (-π(,)0) → 𝑠 ∈ ℝ)
364	43	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ ℝ) → 𝐹:ℝ⟶ℝ)
365	44	adantr 483	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑠 ∈ ℝ) → 𝑋 ∈ ℝ)
366		simpr 487	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑠 ∈ ℝ) → 𝑠 ∈ ℝ)
367	365, 366	readdcld 10670	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ ℝ) → (𝑋 + 𝑠) ∈ ℝ)
368	364, 367	ffvelrnd 6852	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ ℝ) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
369	368	adantlr 713	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ ℝ) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
370	288	dirkerre 42429	. . . . . . . . . . . . 13 ⊢ ((𝑛 ∈ ℕ ∧ 𝑠 ∈ ℝ) → ((𝐷‘𝑛)‘𝑠) ∈ ℝ)
371	370	adantll 712	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ ℝ) → ((𝐷‘𝑛)‘𝑠) ∈ ℝ)
372	369, 371	remulcld 10671	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ ℝ) → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) ∈ ℝ)
373	363, 372	sylan2 594	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (-π(,)0)) → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) ∈ ℝ)
374		ioossicc 12823	. . . . . . . . . . . . 13 ⊢ (-π(,)0) ⊆ (-π[,]0)
375	61	leidi 11174	. . . . . . . . . . . . . 14 ⊢ -π ≤ -π
376	62, 54, 60	ltleii 10763	. . . . . . . . . . . . . 14 ⊢ 0 ≤ π
377		iccss 12805	. . . . . . . . . . . . . 14 ⊢ (((-π ∈ ℝ ∧ π ∈ ℝ) ∧ (-π ≤ -π ∧ 0 ≤ π)) → (-π[,]0) ⊆ (-π[,]π))
378	61, 54, 375, 376, 377	mp4an 691	. . . . . . . . . . . . 13 ⊢ (-π[,]0) ⊆ (-π[,]π)
379	374, 378	sstri 3976	. . . . . . . . . . . 12 ⊢ (-π(,)0) ⊆ (-π[,]π)
380	379	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (-π(,)0) ⊆ (-π[,]π))
381		ioombl 24166	. . . . . . . . . . . 12 ⊢ (-π(,)0) ∈ dom vol
382	381	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (-π(,)0) ∈ dom vol)
383	43	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → 𝐹:ℝ⟶ℝ)
384	44	adantr 483	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → 𝑋 ∈ ℝ)
385	56, 55	iccssred 41829	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (-π[,]π) ⊆ ℝ)
386	385	sselda 3967	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → 𝑠 ∈ ℝ)
387	384, 386	readdcld 10670	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → (𝑋 + 𝑠) ∈ ℝ)
388	383, 387	ffvelrnd 6852	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (-π[,]π)) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
389	388	adantlr 713	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (-π[,]π)) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
390		iccssre 12819	. . . . . . . . . . . . . . . 16 ⊢ ((-π ∈ ℝ ∧ π ∈ ℝ) → (-π[,]π) ⊆ ℝ)
391	61, 54, 390	mp2an 690	. . . . . . . . . . . . . . 15 ⊢ (-π[,]π) ⊆ ℝ
392	391	sseli 3963	. . . . . . . . . . . . . 14 ⊢ (𝑠 ∈ (-π[,]π) → 𝑠 ∈ ℝ)
393	392, 370	sylan2 594	. . . . . . . . . . . . 13 ⊢ ((𝑛 ∈ ℕ ∧ 𝑠 ∈ (-π[,]π)) → ((𝐷‘𝑛)‘𝑠) ∈ ℝ)
394	393	adantll 712	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (-π[,]π)) → ((𝐷‘𝑛)‘𝑠) ∈ ℝ)
395	389, 394	remulcld 10671	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (-π[,]π)) → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) ∈ ℝ)
396	61	a1i 11	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → -π ∈ ℝ)
397	54	a1i 11	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → π ∈ ℝ)
398	43	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝐹:ℝ⟶ℝ)
399	44	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑋 ∈ ℝ)
400	76	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑁 ∈ ℕ)
401	77	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑉 ∈ ((𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π + 𝑋) ∧ (𝑝‘𝑛) = (π + 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})‘𝑁))
402	122	adantlr 713	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑖 ∈ (0..^𝑁)) → (𝐹 ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) ∈ (((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))–cn→ℂ))
403	225	adantlr 713	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑖 ∈ (0..^𝑁)) → if(((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘(𝑉‘𝑖))) = (𝑄‘((𝑦 ∈ ℝ ↦ sup({𝑓 ∈ (0..^𝑀) ∣ (𝑄‘𝑓) ≤ ((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖))), ((𝑗 ∈ (0..^𝑀) ↦ ⦋𝑗 / 𝑖⦌𝐶)‘((𝑦 ∈ ℝ ↦ sup({𝑓 ∈ (0..^𝑀) ∣ (𝑄‘𝑓) ≤ ((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖))), (𝐹‘((𝑑 ∈ (-π(,]π) ↦ if(𝑑 = π, -π, 𝑑))‘((𝑐 ∈ ℝ ↦ (𝑐 + ((⌊‘((π − 𝑐) / 𝑇)) · 𝑇)))‘(𝑉‘𝑖))))) ∈ ((𝐹 ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) limℂ (𝑉‘𝑖)))
404	236	adantlr 713	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑖 ∈ (0..^𝑁)) → if(((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘(𝑉‘(𝑖 + 1))) = (𝑄‘(((𝑦 ∈ ℝ ↦ sup({ℎ ∈ (0..^𝑀) ∣ (𝑄‘ℎ) ≤ ((𝑔 ∈ (-π(,]π) ↦ if(𝑔 = π, -π, 𝑔))‘((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖)) + 1)), ((𝑗 ∈ (0..^𝑀) ↦ ⦋𝑗 / 𝑖⦌𝑈)‘((𝑦 ∈ ℝ ↦ sup({ℎ ∈ (0..^𝑀) ∣ (𝑄‘ℎ) ≤ ((𝑔 ∈ (-π(,]π) ↦ if(𝑔 = π, -π, 𝑔))‘((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝑖))), (𝐹‘((𝑒 ∈ ℝ ↦ (𝑒 + ((⌊‘((π − 𝑒) / 𝑇)) · 𝑇)))‘(𝑉‘(𝑖 + 1))))) ∈ ((𝐹 ↾ ((𝑉‘𝑖)(,)(𝑉‘(𝑖 + 1)))) limℂ (𝑉‘(𝑖 + 1))))
405	288	dirkercncf 42441	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → (𝐷‘𝑛) ∈ (ℝ–cn→ℝ))
406	405	adantl 484	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝐷‘𝑛) ∈ (ℝ–cn→ℝ))
407		eqid 2821	. . . . . . . . . . . 12 ⊢ (𝑠 ∈ (-π[,]π) ↦ ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠))) = (𝑠 ∈ (-π[,]π) ↦ ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)))
408	396, 397, 398, 399, 45, 400, 401, 402, 403, 404, 319, 51, 406, 407	fourierdlem84 42524	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑠 ∈ (-π[,]π) ↦ ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠))) ∈ 𝐿1)
409	380, 382, 395, 408	iblss 24405	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑠 ∈ (-π(,)0) ↦ ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠))) ∈ 𝐿1)
410	373, 409	itgcl 24384	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 ∈ ℂ)
411	360, 361, 362, 410	fvmptd 6775	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛) = ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
412	411, 410	eqeltrd 2913	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛) ∈ ℂ)
413		eqidd 2822	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) = (𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠))
414	339	adantl 484	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑚 = 𝑛) → ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 = ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
415	43	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (0(,)π)) → 𝐹:ℝ⟶ℝ)
416	44	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (0(,)π)) → 𝑋 ∈ ℝ)
417		elioore 12769	. . . . . . . . . . . . . . 15 ⊢ (𝑠 ∈ (0(,)π) → 𝑠 ∈ ℝ)
418	417	adantl 484	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑠 ∈ (0(,)π)) → 𝑠 ∈ ℝ)
419	416, 418	readdcld 10670	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑠 ∈ (0(,)π)) → (𝑋 + 𝑠) ∈ ℝ)
420	415, 419	ffvelrnd 6852	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑠 ∈ (0(,)π)) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
421	420	adantlr 713	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (0(,)π)) → (𝐹‘(𝑋 + 𝑠)) ∈ ℝ)
422	417, 370	sylan2 594	. . . . . . . . . . . 12 ⊢ ((𝑛 ∈ ℕ ∧ 𝑠 ∈ (0(,)π)) → ((𝐷‘𝑛)‘𝑠) ∈ ℝ)
423	422	adantll 712	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (0(,)π)) → ((𝐷‘𝑛)‘𝑠) ∈ ℝ)
424	421, 423	remulcld 10671	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑠 ∈ (0(,)π)) → ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) ∈ ℝ)
425		ioossicc 12823	. . . . . . . . . . . . 13 ⊢ (0(,)π) ⊆ (0[,]π)
426	61, 62, 59	ltleii 10763	. . . . . . . . . . . . . 14 ⊢ -π ≤ 0
427	54	leidi 11174	. . . . . . . . . . . . . 14 ⊢ π ≤ π
428		iccss 12805	. . . . . . . . . . . . . 14 ⊢ (((-π ∈ ℝ ∧ π ∈ ℝ) ∧ (-π ≤ 0 ∧ π ≤ π)) → (0[,]π) ⊆ (-π[,]π))
429	61, 54, 426, 427, 428	mp4an 691	. . . . . . . . . . . . 13 ⊢ (0[,]π) ⊆ (-π[,]π)
430	425, 429	sstri 3976	. . . . . . . . . . . 12 ⊢ (0(,)π) ⊆ (-π[,]π)
431	430	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (0(,)π) ⊆ (-π[,]π))
432		ioombl 24166	. . . . . . . . . . . 12 ⊢ (0(,)π) ∈ dom vol
433	432	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (0(,)π) ∈ dom vol)
434	431, 433, 395, 408	iblss 24405	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑠 ∈ (0(,)π) ↦ ((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠))) ∈ 𝐿1)
435	424, 434	itgcl 24384	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 ∈ ℂ)
436	413, 414, 362, 435	fvmptd 6775	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛) = ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)
437	436, 435	eqeltrd 2913	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛) ∈ ℂ)
438		eleq1w 2895	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑛 → (𝑚 ∈ ℕ ↔ 𝑛 ∈ ℕ))
439	438	anbi2d 630	. . . . . . . . . 10 ⊢ (𝑚 = 𝑛 → ((𝜑 ∧ 𝑚 ∈ ℕ) ↔ (𝜑 ∧ 𝑛 ∈ ℕ)))
440		fveq2 6670	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑛 → (𝑍‘𝑚) = (𝑍‘𝑛))
441	270, 339	oveq12d 7174	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑛 → (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠))
442	440, 441	eqeq12d 2837	. . . . . . . . . 10 ⊢ (𝑚 = 𝑛 → ((𝑍‘𝑚) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠) ↔ (𝑍‘𝑛) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠)))
443	439, 442	imbi12d 347	. . . . . . . . 9 ⊢ (𝑚 = 𝑛 → (((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑍‘𝑚) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)) ↔ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑍‘𝑛) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠))))
444		oveq1 7163	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 𝑚 → (𝑛 · 𝑥) = (𝑚 · 𝑥))
445	444	fveq2d 6674	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑚 → (cos‘(𝑛 · 𝑥)) = (cos‘(𝑚 · 𝑥)))
446	445	oveq2d 7172	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑚 → ((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) = ((𝐹‘𝑥) · (cos‘(𝑚 · 𝑥))))
447	446	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝑛 = 𝑚 ∧ 𝑥 ∈ (-π(,)π)) → ((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) = ((𝐹‘𝑥) · (cos‘(𝑚 · 𝑥))))
448	447	itgeq2dv 24382	. . . . . . . . . . . . 13 ⊢ (𝑛 = 𝑚 → ∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 = ∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑚 · 𝑥))) d𝑥)
449	448	oveq1d 7171	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑚 → (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π) = (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑚 · 𝑥))) d𝑥 / π))
450	449	cbvmptv 5169	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π)) = (𝑚 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑚 · 𝑥))) d𝑥 / π))
451	29, 450	eqtri 2844	. . . . . . . . . 10 ⊢ 𝐴 = (𝑚 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑚 · 𝑥))) d𝑥 / π))
452		fourierdlem112.b	. . . . . . . . . . 11 ⊢ 𝐵 = (𝑛 ∈ ℕ ↦ (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 / π))
453	444	fveq2d 6674	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑚 → (sin‘(𝑛 · 𝑥)) = (sin‘(𝑚 · 𝑥)))
454	453	oveq2d 7172	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑚 → ((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) = ((𝐹‘𝑥) · (sin‘(𝑚 · 𝑥))))
455	454	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝑛 = 𝑚 ∧ 𝑥 ∈ (-π(,)π)) → ((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) = ((𝐹‘𝑥) · (sin‘(𝑚 · 𝑥))))
456	455	itgeq2dv 24382	. . . . . . . . . . . . 13 ⊢ (𝑛 = 𝑚 → ∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 = ∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑚 · 𝑥))) d𝑥)
457	456	oveq1d 7171	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑚 → (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 / π) = (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑚 · 𝑥))) d𝑥 / π))
458	457	cbvmptv 5169	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ ↦ (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 / π)) = (𝑚 ∈ ℕ ↦ (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑚 · 𝑥))) d𝑥 / π))
459	452, 458	eqtri 2844	. . . . . . . . . 10 ⊢ 𝐵 = (𝑚 ∈ ℕ ↦ (∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑚 · 𝑥))) d𝑥 / π))
460		fveq2 6670	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑘 → (𝐴‘𝑛) = (𝐴‘𝑘))
461		oveq1 7163	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 = 𝑘 → (𝑛 · 𝑋) = (𝑘 · 𝑋))
462	461	fveq2d 6674	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑘 → (cos‘(𝑛 · 𝑋)) = (cos‘(𝑘 · 𝑋)))
463	460, 462	oveq12d 7174	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑘 → ((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) = ((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))))
464		fveq2 6670	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑘 → (𝐵‘𝑛) = (𝐵‘𝑘))
465	461	fveq2d 6674	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 = 𝑘 → (sin‘(𝑛 · 𝑋)) = (sin‘(𝑘 · 𝑋)))
466	464, 465	oveq12d 7174	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑘 → ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))) = ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))
467	463, 466	oveq12d 7174	. . . . . . . . . . . . . 14 ⊢ (𝑛 = 𝑘 → (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) = (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
468	467	cbvsumv 15053	. . . . . . . . . . . . 13 ⊢ Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) = Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))
469	468	oveq2i 7167	. . . . . . . . . . . 12 ⊢ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
470	469	mpteq2i 5158	. . . . . . . . . . 11 ⊢ (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))) = (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))))
471		oveq2 7164	. . . . . . . . . . . . . . 15 ⊢ (𝑚 = 𝑛 → (1...𝑚) = (1...𝑛))
472	471	sumeq1d 15058	. . . . . . . . . . . . . 14 ⊢ (𝑚 = 𝑛 → Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
473	472	oveq2d 7172	. . . . . . . . . . . . 13 ⊢ (𝑚 = 𝑛 → (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) = (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))))
474	473	cbvmptv 5169	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))) = (𝑛 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))))
475		fveq2 6670	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑚 → (𝐴‘𝑘) = (𝐴‘𝑚))
476		oveq1 7163	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 = 𝑚 → (𝑘 · 𝑋) = (𝑚 · 𝑋))
477	476	fveq2d 6674	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑚 → (cos‘(𝑘 · 𝑋)) = (cos‘(𝑚 · 𝑋)))
478	475, 477	oveq12d 7174	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑚 → ((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) = ((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))))
479		fveq2 6670	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑚 → (𝐵‘𝑘) = (𝐵‘𝑚))
480	476	fveq2d 6674	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑚 → (sin‘(𝑘 · 𝑋)) = (sin‘(𝑚 · 𝑋)))
481	479, 480	oveq12d 7174	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑚 → ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))) = ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋))))
482	478, 481	oveq12d 7174	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑚 → (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))) + ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋)))))
483	482	cbvsumv 15053	. . . . . . . . . . . . . 14 ⊢ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑚 ∈ (1...𝑛)(((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))) + ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋))))
484	483	oveq2i 7167	. . . . . . . . . . . . 13 ⊢ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) = (((𝐴‘0) / 2) + Σ𝑚 ∈ (1...𝑛)(((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))) + ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋)))))
485	484	mpteq2i 5158	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))) = (𝑛 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑚 ∈ (1...𝑛)(((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))) + ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋))))))
486	474, 485	eqtri 2844	. . . . . . . . . . 11 ⊢ (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))) = (𝑛 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑚 ∈ (1...𝑛)(((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))) + ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋))))))
487	28, 470, 486	3eqtri 2848	. . . . . . . . . 10 ⊢ 𝑍 = (𝑛 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑚 ∈ (1...𝑛)(((𝐴‘𝑚) · (cos‘(𝑚 · 𝑋))) + ((𝐵‘𝑚) · (sin‘(𝑚 · 𝑋))))))
488		oveq2 7164	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑥 → (𝑋 + 𝑦) = (𝑋 + 𝑥))
489	488	fveq2d 6674	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑥 → (𝐹‘(𝑋 + 𝑦)) = (𝐹‘(𝑋 + 𝑥)))
490		fveq2 6670	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑥 → ((𝐷‘𝑚)‘𝑦) = ((𝐷‘𝑚)‘𝑥))
491	489, 490	oveq12d 7174	. . . . . . . . . . 11 ⊢ (𝑦 = 𝑥 → ((𝐹‘(𝑋 + 𝑦)) · ((𝐷‘𝑚)‘𝑦)) = ((𝐹‘(𝑋 + 𝑥)) · ((𝐷‘𝑚)‘𝑥)))
492	491	cbvmptv 5169	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℝ ↦ ((𝐹‘(𝑋 + 𝑦)) · ((𝐷‘𝑚)‘𝑦))) = (𝑥 ∈ ℝ ↦ ((𝐹‘(𝑋 + 𝑥)) · ((𝐷‘𝑚)‘𝑥)))
493		eqid 2821	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π − 𝑋) ∧ (𝑝‘𝑛) = (π − 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))}) = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = (-π − 𝑋) ∧ (𝑝‘𝑛) = (π − 𝑋)) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))})
494		fveq2 6670	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑖 → (𝑄‘𝑗) = (𝑄‘𝑖))
495	494	oveq1d 7171	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑖 → ((𝑄‘𝑗) − 𝑋) = ((𝑄‘𝑖) − 𝑋))
496	495	cbvmptv 5169	. . . . . . . . . 10 ⊢ (𝑗 ∈ (0...𝑀) ↦ ((𝑄‘𝑗) − 𝑋)) = (𝑖 ∈ (0...𝑀) ↦ ((𝑄‘𝑖) − 𝑋))
497	451, 459, 487, 288, 51, 52, 53, 146, 43, 92, 492, 103, 222, 233, 48, 493, 496	fourierdlem111 42551	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑍‘𝑚) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠))
498	443, 497	chvarvv 2005	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑍‘𝑛) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠))
499	411, 436	oveq12d 7174	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (((𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛) + ((𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛)) = (∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠 + ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑛)‘𝑠)) d𝑠))
500	498, 499	eqtr4d 2859	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑍‘𝑛) = (((𝑚 ∈ ℕ ↦ ∫(-π(,)0)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛) + ((𝑚 ∈ ℕ ↦ ∫(0(,)π)((𝐹‘(𝑋 + 𝑠)) · ((𝐷‘𝑚)‘𝑠)) d𝑠)‘𝑛)))
501	16, 24, 27, 42, 14, 15, 333, 337, 359, 412, 437, 500	climaddf 41945	. . . . . 6 ⊢ (𝜑 → 𝑍 ⇝ ((𝐿 / 2) + (𝑅 / 2)))
502		limccl 24473	. . . . . . . 8 ⊢ ((𝐹 ↾ (-∞(,)𝑋)) limℂ 𝑋) ⊆ ℂ
503	502, 285	sseldi 3965	. . . . . . 7 ⊢ (𝜑 → 𝐿 ∈ ℂ)
504		limccl 24473	. . . . . . . 8 ⊢ ((𝐹 ↾ (𝑋(,)+∞)) limℂ 𝑋) ⊆ ℂ
505	504, 284	sseldi 3965	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ ℂ)
506		2cnd 11716	. . . . . . 7 ⊢ (𝜑 → 2 ∈ ℂ)
507		2pos 11741	. . . . . . . . 9 ⊢ 0 < 2
508	507	a1i 11	. . . . . . . 8 ⊢ (𝜑 → 0 < 2)
509	508	gt0ne0d 11204	. . . . . . 7 ⊢ (𝜑 → 2 ≠ 0)
510	503, 505, 506, 509	divdird 11454	. . . . . 6 ⊢ (𝜑 → ((𝐿 + 𝑅) / 2) = ((𝐿 / 2) + (𝑅 / 2)))
511	501, 510	breqtrrd 5094	. . . . 5 ⊢ (𝜑 → 𝑍 ⇝ ((𝐿 + 𝑅) / 2))
512		0nn0 11913	. . . . . . . 8 ⊢ 0 ∈ ℕ0
513	43	adantr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 0 ∈ ℕ0) → 𝐹:ℝ⟶ℝ)
514		eqid 2821	. . . . . . . . . 10 ⊢ (-π(,)π) = (-π(,)π)
515		ioossre 12799	. . . . . . . . . . . . . 14 ⊢ (-π(,)π) ⊆ ℝ
516	515	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (-π(,)π) ⊆ ℝ)
517	43, 516	feqresmpt 6734	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐹 ↾ (-π(,)π)) = (𝑥 ∈ (-π(,)π) ↦ (𝐹‘𝑥)))
518		ioossicc 12823	. . . . . . . . . . . . . 14 ⊢ (-π(,)π) ⊆ (-π[,]π)
519	518	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (-π(,)π) ⊆ (-π[,]π))
520		ioombl 24166	. . . . . . . . . . . . . 14 ⊢ (-π(,)π) ∈ dom vol
521	520	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (-π(,)π) ∈ dom vol)
522	43	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (-π[,]π)) → 𝐹:ℝ⟶ℝ)
523	385	sselda 3967	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (-π[,]π)) → 𝑥 ∈ ℝ)
524	522, 523	ffvelrnd 6852	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (-π[,]π)) → (𝐹‘𝑥) ∈ ℝ)
525	43, 385	feqresmpt 6734	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝐹 ↾ (-π[,]π)) = (𝑥 ∈ (-π[,]π) ↦ (𝐹‘𝑥)))
526	178	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ℝ ⊆ ℂ)
527	43, 526	fssd 6528	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐹:ℝ⟶ℂ)
528	527, 385	fssresd 6545	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝐹 ↾ (-π[,]π)):(-π[,]π)⟶ℂ)
529		ioossicc 12823	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ((𝑄‘𝑖)[,](𝑄‘(𝑖 + 1)))
530	61	rexri 10699	. . . . . . . . . . . . . . . . . . . 20 ⊢ -π ∈ ℝ*
531	530	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → -π ∈ ℝ*)
532	54	rexri 10699	. . . . . . . . . . . . . . . . . . . 20 ⊢ π ∈ ℝ*
533	532	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → π ∈ ℝ*)
534	51, 52, 53	fourierdlem15 42456	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 𝑄:(0...𝑀)⟶(-π[,]π))
535	534	adantr 483	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝑄:(0...𝑀)⟶(-π[,]π))
536		simpr 487	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝑖 ∈ (0..^𝑀))
537	531, 533, 535, 536	fourierdlem8 42449	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝑄‘𝑖)[,](𝑄‘(𝑖 + 1))) ⊆ (-π[,]π))
538	529, 537	sstrid 3978	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ (-π[,]π))
539	538	resabs1d 5884	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) = (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))))
540	539, 103	eqeltrd 2913	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
541	539	eqcomd 2827	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) = ((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))))
542	541	oveq1d 7171	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)) = (((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)))
543	222, 542	eleqtrd 2915	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝐶 ∈ (((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘𝑖)))
544	541	oveq1d 7171	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))) = (((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))))
545	233, 544	eleqtrd 2915	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝑈 ∈ (((𝐹 ↾ (-π[,]π)) ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1))))
546	51, 52, 53, 528, 540, 543, 545	fourierdlem69 42509	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝐹 ↾ (-π[,]π)) ∈ 𝐿1)
547	525, 546	eqeltrrd 2914	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑥 ∈ (-π[,]π) ↦ (𝐹‘𝑥)) ∈ 𝐿1)
548	519, 521, 524, 547	iblss 24405	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑥 ∈ (-π(,)π) ↦ (𝐹‘𝑥)) ∈ 𝐿1)
549	517, 548	eqeltrd 2913	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐹 ↾ (-π(,)π)) ∈ 𝐿1)
550	549	adantr 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 0 ∈ ℕ0) → (𝐹 ↾ (-π(,)π)) ∈ 𝐿1)
551		simpr 487	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 0 ∈ ℕ0) → 0 ∈ ℕ0)
552	513, 514, 550, 29, 551	fourierdlem16 42457	. . . . . . . . 9 ⊢ ((𝜑 ∧ 0 ∈ ℕ0) → (((𝐴‘0) ∈ ℝ ∧ (𝑥 ∈ (-π(,)π) ↦ (𝐹‘𝑥)) ∈ 𝐿1) ∧ ∫(-π(,)π)((𝐹‘𝑥) · (cos‘(0 · 𝑥))) d𝑥 ∈ ℝ))
553	552	simplld 766	. . . . . . . 8 ⊢ ((𝜑 ∧ 0 ∈ ℕ0) → (𝐴‘0) ∈ ℝ)
554	512, 553	mpan2 689	. . . . . . 7 ⊢ (𝜑 → (𝐴‘0) ∈ ℝ)
555	554	rehalfcld 11885	. . . . . 6 ⊢ (𝜑 → ((𝐴‘0) / 2) ∈ ℝ)
556	555	recnd 10669	. . . . 5 ⊢ (𝜑 → ((𝐴‘0) / 2) ∈ ℂ)
557	334	mptex 6986	. . . . . 6 ⊢ (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) ∈ V
558	557	a1i 11	. . . . 5 ⊢ (𝜑 → (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) ∈ V)
559		simpr 487	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → 𝑚 ∈ ℕ)
560	555	adantr 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → ((𝐴‘0) / 2) ∈ ℝ)
561		fzfid 13342	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (1...𝑚) ∈ Fin)
562		simpll 765	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑛 ∈ (1...𝑚)) → 𝜑)
563		elfznn 12937	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ (1...𝑚) → 𝑛 ∈ ℕ)
564	563	adantl 484	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑛 ∈ (1...𝑚)) → 𝑛 ∈ ℕ)
565		simpl 485	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝜑)
566	362	nnnn0d 11956	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑛 ∈ ℕ0)
567		eleq1w 2895	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑛 → (𝑘 ∈ ℕ0 ↔ 𝑛 ∈ ℕ0))
568	567	anbi2d 630	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑛 → ((𝜑 ∧ 𝑘 ∈ ℕ0) ↔ (𝜑 ∧ 𝑛 ∈ ℕ0)))
569		fveq2 6670	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 𝑛 → (𝐴‘𝑘) = (𝐴‘𝑛))
570	569	eleq1d 2897	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑛 → ((𝐴‘𝑘) ∈ ℝ ↔ (𝐴‘𝑛) ∈ ℝ))
571	568, 570	imbi12d 347	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑛 → (((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴‘𝑘) ∈ ℝ) ↔ ((𝜑 ∧ 𝑛 ∈ ℕ0) → (𝐴‘𝑛) ∈ ℝ)))
572	43	adantr 483	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝐹:ℝ⟶ℝ)
573	549	adantr 483	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹 ↾ (-π(,)π)) ∈ 𝐿1)
574		simpr 487	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈ ℕ0)
575	572, 514, 573, 29, 574	fourierdlem16 42457	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (((𝐴‘𝑘) ∈ ℝ ∧ (𝑥 ∈ (-π(,)π) ↦ (𝐹‘𝑥)) ∈ 𝐿1) ∧ ∫(-π(,)π)((𝐹‘𝑥) · (cos‘(𝑘 · 𝑥))) d𝑥 ∈ ℝ))
576	575	simplld 766	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴‘𝑘) ∈ ℝ)
577	571, 576	chvarvv 2005	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ0) → (𝐴‘𝑛) ∈ ℝ)
578	565, 566, 577	syl2anc 586	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝐴‘𝑛) ∈ ℝ)
579	362	nnred 11653	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑛 ∈ ℝ)
580	579, 399	remulcld 10671	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑛 · 𝑋) ∈ ℝ)
581	580	recoscld 15497	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (cos‘(𝑛 · 𝑋)) ∈ ℝ)
582	578, 581	remulcld 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) ∈ ℝ)
583		eleq1w 2895	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑛 → (𝑘 ∈ ℕ ↔ 𝑛 ∈ ℕ))
584	583	anbi2d 630	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑛 → ((𝜑 ∧ 𝑘 ∈ ℕ) ↔ (𝜑 ∧ 𝑛 ∈ ℕ)))
585		fveq2 6670	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 𝑛 → (𝐵‘𝑘) = (𝐵‘𝑛))
586	585	eleq1d 2897	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑛 → ((𝐵‘𝑘) ∈ ℝ ↔ (𝐵‘𝑛) ∈ ℝ))
587	584, 586	imbi12d 347	. . . . . . . . . . . . . 14 ⊢ (𝑘 = 𝑛 → (((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐵‘𝑘) ∈ ℝ) ↔ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝐵‘𝑛) ∈ ℝ)))
588	43	adantr 483	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐹:ℝ⟶ℝ)
589	549	adantr 483	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐹 ↾ (-π(,)π)) ∈ 𝐿1)
590		simpr 487	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
591	588, 514, 589, 452, 590	fourierdlem21 42462	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐵‘𝑘) ∈ ℝ ∧ (𝑥 ∈ (-π(,)π) ↦ ((𝐹‘𝑥) · (sin‘(𝑘 · 𝑥)))) ∈ 𝐿1) ∧ ∫(-π(,)π)((𝐹‘𝑥) · (sin‘(𝑘 · 𝑥))) d𝑥 ∈ ℝ))
592	591	simplld 766	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝐵‘𝑘) ∈ ℝ)
593	587, 592	chvarvv 2005	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝐵‘𝑛) ∈ ℝ)
594	580	resincld 15496	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (sin‘(𝑛 · 𝑋)) ∈ ℝ)
595	593, 594	remulcld 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))) ∈ ℝ)
596	582, 595	readdcld 10670	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) ∈ ℝ)
597	562, 564, 596	syl2anc 586	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑛 ∈ (1...𝑚)) → (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) ∈ ℝ)
598	561, 597	fsumrecl 15091	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) ∈ ℝ)
599	560, 598	readdcld 10670	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) ∈ ℝ)
600	28	fvmpt2 6779	. . . . . . . 8 ⊢ ((𝑚 ∈ ℕ ∧ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) ∈ ℝ) → (𝑍‘𝑚) = (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
601	559, 599, 600	syl2anc 586	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑍‘𝑚) = (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
602	601, 599	eqeltrd 2913	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑍‘𝑚) ∈ ℝ)
603	602	recnd 10669	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑍‘𝑚) ∈ ℂ)
604		eqidd 2822	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))))
605		oveq2 7164	. . . . . . . . 9 ⊢ (𝑛 = 𝑚 → (1...𝑛) = (1...𝑚))
606	605	sumeq1d 15058	. . . . . . . 8 ⊢ (𝑛 = 𝑚 → Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
607	606	adantl 484	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑛 = 𝑚) → Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
608		sumex 15044	. . . . . . . 8 ⊢ Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ V
609	608	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ V)
610	604, 607, 559, 609	fvmptd 6775	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))‘𝑚) = Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
611	560	recnd 10669	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → ((𝐴‘0) / 2) ∈ ℂ)
612	598	recnd 10669	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) ∈ ℂ)
613	611, 612	pncan2d 10999	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → ((((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) − ((𝐴‘0) / 2)) = Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
614	613, 468	syl6req 2873	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑘 ∈ (1...𝑚)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = ((((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) − ((𝐴‘0) / 2)))
615		ovex 7189	. . . . . . . . 9 ⊢ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) ∈ V
616	28	fvmpt2 6779	. . . . . . . . 9 ⊢ ((𝑚 ∈ ℕ ∧ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) ∈ V) → (𝑍‘𝑚) = (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
617	559, 615, 616	sylancl 588	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝑍‘𝑚) = (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))))
618	617	eqcomd 2827	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = (𝑍‘𝑚))
619	618	oveq1d 7171	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → ((((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) − ((𝐴‘0) / 2)) = ((𝑍‘𝑚) − ((𝐴‘0) / 2)))
620	610, 614, 619	3eqtrd 2860	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))‘𝑚) = ((𝑍‘𝑚) − ((𝐴‘0) / 2)))
621	14, 15, 511, 556, 558, 603, 620	climsubc1 14994	. . . 4 ⊢ (𝜑 → (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)))
622		seqex 13372	. . . . . 6 ⊢ seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))) ∈ V
623	622	a1i 11	. . . . 5 ⊢ (𝜑 → seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))) ∈ V)
624		eqidd 2822	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))))
625		oveq2 7164	. . . . . . . . 9 ⊢ (𝑛 = 𝑙 → (1...𝑛) = (1...𝑙))
626	625	sumeq1d 15058	. . . . . . . 8 ⊢ (𝑛 = 𝑙 → Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
627	626	adantl 484	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑙 ∈ ℕ) ∧ 𝑛 = 𝑙) → Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
628		simpr 487	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → 𝑙 ∈ ℕ)
629		fzfid 13342	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → (1...𝑙) ∈ Fin)
630		elfznn 12937	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑙) → 𝑘 ∈ ℕ)
631	630	nnnn0d 11956	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...𝑙) → 𝑘 ∈ ℕ0)
632	631, 576	sylan2 594	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → (𝐴‘𝑘) ∈ ℝ)
633	630	nnred 11653	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ (1...𝑙) → 𝑘 ∈ ℝ)
634	633	adantl 484	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → 𝑘 ∈ ℝ)
635	146	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → 𝑋 ∈ ℝ)
636	634, 635	remulcld 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → (𝑘 · 𝑋) ∈ ℝ)
637	636	recoscld 15497	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → (cos‘(𝑘 · 𝑋)) ∈ ℝ)
638	632, 637	remulcld 10671	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → ((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) ∈ ℝ)
639	630, 592	sylan2 594	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → (𝐵‘𝑘) ∈ ℝ)
640	636	resincld 15496	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → (sin‘(𝑘 · 𝑋)) ∈ ℝ)
641	639, 640	remulcld 10671	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))) ∈ ℝ)
642	638, 641	readdcld 10670	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (1...𝑙)) → (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ ℝ)
643	642	adantlr 713	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑙 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑙)) → (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ ℝ)
644	629, 643	fsumrecl 15091	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ ℝ)
645	624, 627, 628, 644	fvmptd 6775	. . . . . 6 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))‘𝑙) = Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
646		eleq1w 2895	. . . . . . . . 9 ⊢ (𝑛 = 𝑙 → (𝑛 ∈ ℕ ↔ 𝑙 ∈ ℕ))
647	646	anbi2d 630	. . . . . . . 8 ⊢ (𝑛 = 𝑙 → ((𝜑 ∧ 𝑛 ∈ ℕ) ↔ (𝜑 ∧ 𝑙 ∈ ℕ)))
648		fveq2 6670	. . . . . . . . 9 ⊢ (𝑛 = 𝑙 → (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑛) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑙))
649	626, 648	eqeq12d 2837	. . . . . . . 8 ⊢ (𝑛 = 𝑙 → (Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑛) ↔ Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑙)))
650	647, 649	imbi12d 347	. . . . . . 7 ⊢ (𝑛 = 𝑙 → (((𝜑 ∧ 𝑛 ∈ ℕ) → Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑛)) ↔ ((𝜑 ∧ 𝑙 ∈ ℕ) → Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑙))))
651		eqidd 2822	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) → (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))) = (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))
652		fveq2 6670	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (𝐴‘𝑗) = (𝐴‘𝑘))
653		oveq1 7163	. . . . . . . . . . . . 13 ⊢ (𝑗 = 𝑘 → (𝑗 · 𝑋) = (𝑘 · 𝑋))
654	653	fveq2d 6674	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (cos‘(𝑗 · 𝑋)) = (cos‘(𝑘 · 𝑋)))
655	652, 654	oveq12d 7174	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → ((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) = ((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))))
656		fveq2 6670	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (𝐵‘𝑗) = (𝐵‘𝑘))
657	653	fveq2d 6674	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (sin‘(𝑗 · 𝑋)) = (sin‘(𝑘 · 𝑋)))
658	656, 657	oveq12d 7174	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))) = ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))
659	655, 658	oveq12d 7174	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))) = (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
660	659	adantl 484	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) ∧ 𝑗 = 𝑘) → (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))) = (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
661		elfznn 12937	. . . . . . . . . 10 ⊢ (𝑘 ∈ (1...𝑛) → 𝑘 ∈ ℕ)
662	661	adantl 484	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) → 𝑘 ∈ ℕ)
663		simpll 765	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) → 𝜑)
664		nnnn0 11905	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℕ0)
665		nn0re 11907	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℕ0 → 𝑘 ∈ ℝ)
666	665	adantl 484	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈ ℝ)
667	146	adantr 483	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑋 ∈ ℝ)
668	666, 667	remulcld 10671	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝑘 · 𝑋) ∈ ℝ)
669	668	recoscld 15497	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (cos‘(𝑘 · 𝑋)) ∈ ℝ)
670	576, 669	remulcld 10671	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) ∈ ℝ)
671	664, 670	sylan2 594	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) ∈ ℝ)
672	664, 668	sylan2 594	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑘 · 𝑋) ∈ ℝ)
673	672	resincld 15496	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (sin‘(𝑘 · 𝑋)) ∈ ℝ)
674	592, 673	remulcld 10671	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))) ∈ ℝ)
675	671, 674	readdcld 10670	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ ℝ)
676	663, 662, 675	syl2anc 586	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) → (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ ℝ)
677	651, 660, 662, 676	fvmptd 6775	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) → ((𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))‘𝑘) = (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))
678	362, 14	eleqtrdi 2923	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → 𝑛 ∈ (ℤ≥‘1))
679	676	recnd 10669	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (1...𝑛)) → (((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) ∈ ℂ)
680	677, 678, 679	fsumser 15087	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑛))
681	650, 680	chvarvv 2005	. . . . . 6 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → Σ𝑘 ∈ (1...𝑙)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑙))
682	645, 681	eqtrd 2856	. . . . 5 ⊢ ((𝜑 ∧ 𝑙 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋)))))‘𝑙) = (seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))‘𝑙))
683	14, 558, 623, 15, 682	climeq 14924	. . . 4 ⊢ (𝜑 → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (1...𝑛)(((𝐴‘𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵‘𝑘) · (sin‘(𝑘 · 𝑋))))) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)) ↔ seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2))))
684	621, 683	mpbid 234	. . 3 ⊢ (𝜑 → seq1( + , (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)))
685	13, 684	eqbrtrd 5088	. 2 ⊢ (𝜑 → seq1( + , 𝑆) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)))
686		eqidd 2822	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))) = (𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))))))
687		fveq2 6670	. . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (𝐴‘𝑗) = (𝐴‘𝑛))
688		oveq1 7163	. . . . . . . . . 10 ⊢ (𝑗 = 𝑛 → (𝑗 · 𝑋) = (𝑛 · 𝑋))
689	688	fveq2d 6674	. . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (cos‘(𝑗 · 𝑋)) = (cos‘(𝑛 · 𝑋)))
690	687, 689	oveq12d 7174	. . . . . . . 8 ⊢ (𝑗 = 𝑛 → ((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) = ((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))))
691		fveq2 6670	. . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (𝐵‘𝑗) = (𝐵‘𝑛))
692	688	fveq2d 6674	. . . . . . . . 9 ⊢ (𝑗 = 𝑛 → (sin‘(𝑗 · 𝑋)) = (sin‘(𝑛 · 𝑋)))
693	691, 692	oveq12d 7174	. . . . . . . 8 ⊢ (𝑗 = 𝑛 → ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋))) = ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))
694	690, 693	oveq12d 7174	. . . . . . 7 ⊢ (𝑗 = 𝑛 → (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))) = (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
695	694	adantl 484	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑗 = 𝑛) → (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))) = (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
696	686, 695, 362, 596	fvmptd 6775	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ (((𝐴‘𝑗) · (cos‘(𝑗 · 𝑋))) + ((𝐵‘𝑗) · (sin‘(𝑗 · 𝑋)))))‘𝑛) = (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))))
697	596	recnd 10669	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) ∈ ℂ)
698	14, 15, 696, 697, 684	isumclim 15112	. . . 4 ⊢ (𝜑 → Σ𝑛 ∈ ℕ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋)))) = (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)))
699	698	oveq2d 7172	. . 3 ⊢ (𝜑 → (((𝐴‘0) / 2) + Σ𝑛 ∈ ℕ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = (((𝐴‘0) / 2) + (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2))))
700	503, 505	addcld 10660	. . . . 5 ⊢ (𝜑 → (𝐿 + 𝑅) ∈ ℂ)
701	700	halfcld 11883	. . . 4 ⊢ (𝜑 → ((𝐿 + 𝑅) / 2) ∈ ℂ)
702	556, 701	pncan3d 11000	. . 3 ⊢ (𝜑 → (((𝐴‘0) / 2) + (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2))) = ((𝐿 + 𝑅) / 2))
703	699, 702	eqtrd 2856	. 2 ⊢ (𝜑 → (((𝐴‘0) / 2) + Σ𝑛 ∈ ℕ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = ((𝐿 + 𝑅) / 2))
704	685, 703	jca 514	1 ⊢ (𝜑 → (seq1( + , 𝑆) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)) ∧ (((𝐴‘0) / 2) + Σ𝑛 ∈ ℕ (((𝐴‘𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵‘𝑛) · (sin‘(𝑛 · 𝑋))))) = ((𝐿 + 𝑅) / 2)))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   = wceq 1537   ∈ wcel 2114  ∀wral 3138  ∃wrex 3139  {crab 3142  Vcvv 3494  ⦋csb 3883   ∪ cun 3934   ∩ cin 3935   ⊆ wss 3936  ifcif 4467  {cpr 4569   class class class wbr 5066   ↦ cmpt 5146  dom cdm 5555  ran crn 5556   ↾ cres 5557  ℩cio 6312  ⟶wf 6351  ‘cfv 6355   Isom wiso 6356  ℩crio 7113  (class class class)co 7156   ↑_m cmap 8406  supcsup 8904  ℂcc 10535  ℝcr 10536  0cc0 10537  1c1 10538   + caddc 10540   · cmul 10542  +∞cpnf 10672  -∞cmnf 10673  ℝ^*cxr 10674   < clt 10675   ≤ cle 10676   − cmin 10870  -cneg 10871   / cdiv 11297  ℕcn 11638  2c2 11693  ℕ₀cn0 11898  ℤcz 11982  ℤ_≥cuz 12244  ℝ⁺crp 12390  (,)cioo 12739  (,]cioc 12740  [,]cicc 12742  ...cfz 12893  ..^cfzo 13034  ⌊cfl 13161   mod cmo 13238  seqcseq 13370  ♯chash 13691  abscabs 14593   ⇝ cli 14841  Σcsu 15042  sincsin 15417  cosccos 15418  πcpi 15420  –cn→ccncf 23484  volcvol 24064  𝐿¹cibl 24218  ∫citg 24219   lim_ℂ climc 24460   D cdv 24461

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-rep 5190  ax-sep 5203  ax-nul 5210  ax-pow 5266  ax-pr 5330  ax-un 7461  ax-inf2 9104  ax-cc 9857  ax-cnex 10593  ax-resscn 10594  ax-1cn 10595  ax-icn 10596  ax-addcl 10597  ax-addrcl 10598  ax-mulcl 10599  ax-mulrcl 10600  ax-mulcom 10601  ax-addass 10602  ax-mulass 10603  ax-distr 10604  ax-i2m1 10605  ax-1ne0 10606  ax-1rid 10607  ax-rnegex 10608  ax-rrecex 10609  ax-cnre 10610  ax-pre-lttri 10611  ax-pre-lttrn 10612  ax-pre-ltadd 10613  ax-pre-mulgt0 10614  ax-pre-sup 10615  ax-addf 10616  ax-mulf 10617

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-fal 1550  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-nel 3124  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3496  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-pss 3954  df-symdif 4219  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4568  df-pr 4570  df-tp 4572  df-op 4574  df-uni 4839  df-int 4877  df-iun 4921  df-iin 4922  df-disj 5032  df-br 5067  df-opab 5129  df-mpt 5147  df-tr 5173  df-id 5460  df-eprel 5465  df-po 5474  df-so 5475  df-fr 5514  df-se 5515  df-we 5516  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-rn 5566  df-res 5567  df-ima 5568  df-pred 6148  df-ord 6194  df-on 6195  df-lim 6196  df-suc 6197  df-iota 6314  df-fun 6357  df-fn 6358  df-f 6359  df-f1 6360  df-fo 6361  df-f1o 6362  df-fv 6363  df-isom 6364  df-riota 7114  df-ov 7159  df-oprab 7160  df-mpo 7161  df-of 7409  df-ofr 7410  df-om 7581  df-1st 7689  df-2nd 7690  df-supp 7831  df-wrecs 7947  df-recs 8008  df-rdg 8046  df-1o 8102  df-2o 8103  df-oadd 8106  df-omul 8107  df-er 8289  df-map 8408  df-pm 8409  df-ixp 8462  df-en 8510  df-dom 8511  df-sdom 8512  df-fin 8513  df-fsupp 8834  df-fi 8875  df-sup 8906  df-inf 8907  df-oi 8974  df-dju 9330  df-card 9368  df-acn 9371  df-pnf 10677  df-mnf 10678  df-xr 10679  df-ltxr 10680  df-le 10681  df-sub 10872  df-neg 10873  df-div 11298  df-nn 11639  df-2 11701  df-3 11702  df-4 11703  df-5 11704  df-6 11705  df-7 11706  df-8 11707  df-9 11708  df-n0 11899  df-xnn0 11969  df-z 11983  df-dec 12100  df-uz 12245  df-q 12350  df-rp 12391  df-xneg 12508  df-xadd 12509  df-xmul 12510  df-ioo 12743  df-ioc 12744  df-ico 12745  df-icc 12746  df-fz 12894  df-fzo 13035  df-fl 13163  df-mod 13239  df-seq 13371  df-exp 13431  df-fac 13635  df-bc 13664  df-hash 13692  df-shft 14426  df-cj 14458  df-re 14459  df-im 14460  df-sqrt 14594  df-abs 14595  df-limsup 14828  df-clim 14845  df-rlim 14846  df-sum 15043  df-ef 15421  df-sin 15423  df-cos 15424  df-pi 15426  df-struct 16485  df-ndx 16486  df-slot 16487  df-base 16489  df-sets 16490  df-ress 16491  df-plusg 16578  df-mulr 16579  df-starv 16580  df-sca 16581  df-vsca 16582  df-ip 16583  df-tset 16584  df-ple 16585  df-ds 16587  df-unif 16588  df-hom 16589  df-cco 16590  df-rest 16696  df-topn 16697  df-0g 16715  df-gsum 16716  df-topgen 16717  df-pt 16718  df-prds 16721  df-xrs 16775  df-qtop 16780  df-imas 16781  df-xps 16783  df-mre 16857  df-mrc 16858  df-acs 16860  df-mgm 17852  df-sgrp 17901  df-mnd 17912  df-submnd 17957  df-mulg 18225  df-cntz 18447  df-cmn 18908  df-psmet 20537  df-xmet 20538  df-met 20539  df-bl 20540  df-mopn 20541  df-fbas 20542  df-fg 20543  df-cnfld 20546  df-top 21502  df-topon 21519  df-topsp 21541  df-bases 21554  df-cld 21627  df-ntr 21628  df-cls 21629  df-nei 21706  df-lp 21744  df-perf 21745  df-cn 21835  df-cnp 21836  df-t1 21922  df-haus 21923  df-cmp 21995  df-tx 22170  df-hmeo 22363  df-fil 22454  df-fm 22546  df-flim 22547  df-flf 22548  df-xms 22930  df-ms 22931  df-tms 22932  df-cncf 23486  df-ovol 24065  df-vol 24066  df-mbf 24220  df-itg1 24221  df-itg2 24222  df-ibl 24223  df-itg 24224  df-0p 24271  df-ditg 24445  df-limc 24464  df-dv 24465

This theorem is referenced by:  fourierdlem113  42553