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Theorem fourierdlem113 42791
Description: Fourier series convergence for periodic, piecewise smooth functions. (Contributed by Glauco Siliprandi, 11-Dec-2019.)
Hypotheses
Ref Expression
fourierdlem113.f (𝜑𝐹:ℝ⟶ℝ)
fourierdlem113.t 𝑇 = (2 · π)
fourierdlem113.per ((𝜑𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹𝑥))
fourierdlem113.x (𝜑𝑋 ∈ ℝ)
fourierdlem113.l (𝜑𝐿 ∈ ((𝐹 ↾ (-∞(,)𝑋)) lim 𝑋))
fourierdlem113.r (𝜑𝑅 ∈ ((𝐹 ↾ (𝑋(,)+∞)) lim 𝑋))
fourierdlem113.p 𝑃 = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝𝑖) < (𝑝‘(𝑖 + 1)))})
fourierdlem113.m (𝜑𝑀 ∈ ℕ)
fourierdlem113.q (𝜑𝑄 ∈ (𝑃𝑀))
fourierdlem113.dvcn ((𝜑𝑖 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
fourierdlem113.dvlb ((𝜑𝑖 ∈ (0..^𝑀)) → (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖)) ≠ ∅)
fourierdlem113.dvub ((𝜑𝑖 ∈ (0..^𝑀)) → (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1))) ≠ ∅)
fourierdlem113.a 𝐴 = (𝑛 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π))
fourierdlem113.b 𝐵 = (𝑛 ∈ ℕ ↦ (∫(-π(,)π)((𝐹𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 / π))
fourierdlem113.15 𝑆 = (𝑛 ∈ ℕ ↦ (((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋)))))
fourierdlem113.e 𝐸 = (𝑥 ∈ ℝ ↦ (𝑥 + ((⌊‘((π − 𝑥) / 𝑇)) · 𝑇)))
fourierdlem113.exq (𝜑 → (𝐸𝑋) ∈ ran 𝑄)
Assertion
Ref Expression
fourierdlem113 (𝜑 → (seq1( + , 𝑆) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)) ∧ (((𝐴‘0) / 2) + Σ𝑛 ∈ ℕ (((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋))))) = ((𝐿 + 𝑅) / 2)))
Distinct variable groups:   𝐴,𝑛   𝐵,𝑛   𝑥,𝐸   𝑖,𝐹,𝑛,𝑥   𝑖,𝐿,𝑛   𝑖,𝑀,𝑥,𝑛   𝑀,𝑝,𝑖,𝑛   𝑄,𝑖,𝑥,𝑛   𝑄,𝑝   𝑅,𝑖,𝑛   𝑇,𝑖,𝑥,𝑛   𝑇,𝑝   𝑖,𝑋,𝑥,𝑛   𝑋,𝑝   𝜑,𝑖,𝑥,𝑛
Allowed substitution hints:   𝜑(𝑝)   𝐴(𝑥,𝑖,𝑝)   𝐵(𝑥,𝑖,𝑝)   𝑃(𝑥,𝑖,𝑛,𝑝)   𝑅(𝑥,𝑝)   𝑆(𝑥,𝑖,𝑛,𝑝)   𝐸(𝑖,𝑛,𝑝)   𝐹(𝑝)   𝐿(𝑥,𝑝)

Proof of Theorem fourierdlem113
Dummy variables 𝑗 𝑘 𝑚 𝑤 𝑦 𝑡 𝑢 𝑧 𝑓 𝑔 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fourierdlem113.f . 2 (𝜑𝐹:ℝ⟶ℝ)
2 oveq1 7156 . . . . . . 7 (𝑤 = 𝑦 → (𝑤 mod (2 · π)) = (𝑦 mod (2 · π)))
32eqeq1d 2826 . . . . . 6 (𝑤 = 𝑦 → ((𝑤 mod (2 · π)) = 0 ↔ (𝑦 mod (2 · π)) = 0))
4 oveq2 7157 . . . . . . . 8 (𝑤 = 𝑦 → ((𝑘 + (1 / 2)) · 𝑤) = ((𝑘 + (1 / 2)) · 𝑦))
54fveq2d 6665 . . . . . . 7 (𝑤 = 𝑦 → (sin‘((𝑘 + (1 / 2)) · 𝑤)) = (sin‘((𝑘 + (1 / 2)) · 𝑦)))
6 oveq1 7156 . . . . . . . . 9 (𝑤 = 𝑦 → (𝑤 / 2) = (𝑦 / 2))
76fveq2d 6665 . . . . . . . 8 (𝑤 = 𝑦 → (sin‘(𝑤 / 2)) = (sin‘(𝑦 / 2)))
87oveq2d 7165 . . . . . . 7 (𝑤 = 𝑦 → ((2 · π) · (sin‘(𝑤 / 2))) = ((2 · π) · (sin‘(𝑦 / 2))))
95, 8oveq12d 7167 . . . . . 6 (𝑤 = 𝑦 → ((sin‘((𝑘 + (1 / 2)) · 𝑤)) / ((2 · π) · (sin‘(𝑤 / 2)))) = ((sin‘((𝑘 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))
103, 9ifbieq2d 4475 . . . . 5 (𝑤 = 𝑦 → if((𝑤 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑤)) / ((2 · π) · (sin‘(𝑤 / 2))))) = if((𝑦 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2))))))
1110cbvmptv 5155 . . . 4 (𝑤 ∈ ℝ ↦ if((𝑤 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑤)) / ((2 · π) · (sin‘(𝑤 / 2)))))) = (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2))))))
12 oveq2 7157 . . . . . . . 8 (𝑘 = 𝑚 → (2 · 𝑘) = (2 · 𝑚))
1312oveq1d 7164 . . . . . . 7 (𝑘 = 𝑚 → ((2 · 𝑘) + 1) = ((2 · 𝑚) + 1))
1413oveq1d 7164 . . . . . 6 (𝑘 = 𝑚 → (((2 · 𝑘) + 1) / (2 · π)) = (((2 · 𝑚) + 1) / (2 · π)))
15 oveq1 7156 . . . . . . . . 9 (𝑘 = 𝑚 → (𝑘 + (1 / 2)) = (𝑚 + (1 / 2)))
1615oveq1d 7164 . . . . . . . 8 (𝑘 = 𝑚 → ((𝑘 + (1 / 2)) · 𝑦) = ((𝑚 + (1 / 2)) · 𝑦))
1716fveq2d 6665 . . . . . . 7 (𝑘 = 𝑚 → (sin‘((𝑘 + (1 / 2)) · 𝑦)) = (sin‘((𝑚 + (1 / 2)) · 𝑦)))
1817oveq1d 7164 . . . . . 6 (𝑘 = 𝑚 → ((sin‘((𝑘 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))) = ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))
1914, 18ifeq12d 4470 . . . . 5 (𝑘 = 𝑚 → if((𝑦 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2))))) = if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2))))))
2019mpteq2dv 5148 . . . 4 (𝑘 = 𝑚 → (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))) = (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))))
2111, 20syl5eq 2871 . . 3 (𝑘 = 𝑚 → (𝑤 ∈ ℝ ↦ if((𝑤 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑤)) / ((2 · π) · (sin‘(𝑤 / 2)))))) = (𝑦 ∈ ℝ ↦ if((𝑦 mod (2 · π)) = 0, (((2 · 𝑚) + 1) / (2 · π)), ((sin‘((𝑚 + (1 / 2)) · 𝑦)) / ((2 · π) · (sin‘(𝑦 / 2)))))))
2221cbvmptv 5155 . 2 (𝑘 ∈ ℕ ↦ (𝑤 ∈ ℝ ↦ if((𝑤 mod (2 · π)) = 0, (((2 · 𝑘) + 1) / (2 · π)), ((sin‘((𝑘 + (1 / 2)) · 𝑤)) / ((2 · π) · (sin‘(𝑤 / 2))))))) = (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)))))))
23 fourierdlem113.p . 2 𝑃 = (𝑛 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m (0...𝑛)) ∣ (((𝑝‘0) = -π ∧ (𝑝𝑛) = π) ∧ ∀𝑖 ∈ (0..^𝑛)(𝑝𝑖) < (𝑝‘(𝑖 + 1)))})
24 fourierdlem113.m . 2 (𝜑𝑀 ∈ ℕ)
25 fourierdlem113.q . 2 (𝜑𝑄 ∈ (𝑃𝑀))
26 oveq1 7156 . . . . . . . 8 (𝑤 = 𝑦 → (𝑤 + (𝑗 · 𝑇)) = (𝑦 + (𝑗 · 𝑇)))
2726eleq1d 2900 . . . . . . 7 (𝑤 = 𝑦 → ((𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄 ↔ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄))
2827rexbidv 3289 . . . . . 6 (𝑤 = 𝑦 → (∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄))
2928cbvrabv 3477 . . . . 5 {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}
3029uneq2i 4122 . . . 4 ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})
3130fveq2i 6664 . . 3 (♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) = (♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))
3231oveq1i 7159 . 2 ((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1) = ((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)
33 oveq1 7156 . . . . . . . . . . . 12 (𝑘 = 𝑗 → (𝑘 · 𝑇) = (𝑗 · 𝑇))
3433oveq2d 7165 . . . . . . . . . . 11 (𝑘 = 𝑗 → (𝑦 + (𝑘 · 𝑇)) = (𝑦 + (𝑗 · 𝑇)))
3534eleq1d 2900 . . . . . . . . . 10 (𝑘 = 𝑗 → ((𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄))
3635cbvrexvw 3435 . . . . . . . . 9 (∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄)
3736a1i 11 . . . . . . . 8 (𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) → (∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄))
3837rabbiia 3457 . . . . . . 7 {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}
3938uneq2i 4122 . . . . . 6 ({(-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)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})
40 isoeq5 7067 . . . . . 6 (({(-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)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}) → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))))
4139, 40ax-mp 5 . . . . 5 (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})))
4241a1i 11 . . . 4 (𝑔 = 𝑓 → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))))
4333oveq2d 7165 . . . . . . . . . . . . . 14 (𝑘 = 𝑗 → (𝑤 + (𝑘 · 𝑇)) = (𝑤 + (𝑗 · 𝑇)))
4443eleq1d 2900 . . . . . . . . . . . . 13 (𝑘 = 𝑗 → ((𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄))
4544cbvrexvw 3435 . . . . . . . . . . . 12 (∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄)
4645a1i 11 . . . . . . . . . . 11 (𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) → (∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄))
4746rabbiia 3457 . . . . . . . . . 10 {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄}
4847uneq2i 4122 . . . . . . . . 9 ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})
4948fveq2i 6664 . . . . . . . 8 (♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) = (♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄}))
5049oveq1i 7159 . . . . . . 7 ((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1) = ((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)
5150oveq2i 7160 . . . . . 6 (0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)) = (0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1))
52 isoeq4 7066 . . . . . 6 ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)) = (0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)) → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))))
5351, 52ax-mp 5 . . . . 5 (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})))
5453a1i 11 . . . 4 (𝑔 = 𝑓 → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))))
55 isoeq1 7063 . . . 4 (𝑔 = 𝑓 → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))))
5642, 54, 553bitrd 308 . . 3 (𝑔 = 𝑓 → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄}))))
5756cbviotavw 6310 . 2 (℩𝑔𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑤 + (𝑗 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑗 ∈ ℤ (𝑦 + (𝑗 · 𝑇)) ∈ ran 𝑄})))
58 fourierdlem113.x . 2 (𝜑𝑋 ∈ ℝ)
59 pire 25057 . . . . 5 π ∈ ℝ
6059renegcli 10945 . . . 4 -π ∈ ℝ
6160a1i 11 . . 3 (𝜑 → -π ∈ ℝ)
6259a1i 11 . . 3 (𝜑 → π ∈ ℝ)
63 negpilt0 41841 . . . 4 -π < 0
6463a1i 11 . . 3 (𝜑 → -π < 0)
65 pipos 25059 . . . 4 0 < π
6665a1i 11 . . 3 (𝜑 → 0 < π)
67 picn 25058 . . . . 5 π ∈ ℂ
68672timesi 11772 . . . 4 (2 · π) = (π + π)
69 fourierdlem113.t . . . 4 𝑇 = (2 · π)
7067, 67subnegi 10963 . . . 4 (π − -π) = (π + π)
7168, 69, 703eqtr4i 2857 . . 3 𝑇 = (π − -π)
7223fourierdlem2 42681 . . . . . . . 8 (𝑀 ∈ ℕ → (𝑄 ∈ (𝑃𝑀) ↔ (𝑄 ∈ (ℝ ↑m (0...𝑀)) ∧ (((𝑄‘0) = -π ∧ (𝑄𝑀) = π) ∧ ∀𝑖 ∈ (0..^𝑀)(𝑄𝑖) < (𝑄‘(𝑖 + 1))))))
7324, 72syl 17 . . . . . . 7 (𝜑 → (𝑄 ∈ (𝑃𝑀) ↔ (𝑄 ∈ (ℝ ↑m (0...𝑀)) ∧ (((𝑄‘0) = -π ∧ (𝑄𝑀) = π) ∧ ∀𝑖 ∈ (0..^𝑀)(𝑄𝑖) < (𝑄‘(𝑖 + 1))))))
7425, 73mpbid 235 . . . . . 6 (𝜑 → (𝑄 ∈ (ℝ ↑m (0...𝑀)) ∧ (((𝑄‘0) = -π ∧ (𝑄𝑀) = π) ∧ ∀𝑖 ∈ (0..^𝑀)(𝑄𝑖) < (𝑄‘(𝑖 + 1)))))
7574simpld 498 . . . . 5 (𝜑𝑄 ∈ (ℝ ↑m (0...𝑀)))
76 elmapi 8424 . . . . 5 (𝑄 ∈ (ℝ ↑m (0...𝑀)) → 𝑄:(0...𝑀)⟶ℝ)
7775, 76syl 17 . . . 4 (𝜑𝑄:(0...𝑀)⟶ℝ)
78 fzfid 13345 . . . 4 (𝜑 → (0...𝑀) ∈ Fin)
79 rnffi 41726 . . . 4 ((𝑄:(0...𝑀)⟶ℝ ∧ (0...𝑀) ∈ Fin) → ran 𝑄 ∈ Fin)
8077, 78, 79syl2anc 587 . . 3 (𝜑 → ran 𝑄 ∈ Fin)
8123, 24, 25fourierdlem15 42694 . . . 4 (𝜑𝑄:(0...𝑀)⟶(-π[,]π))
82 frn 6509 . . . 4 (𝑄:(0...𝑀)⟶(-π[,]π) → ran 𝑄 ⊆ (-π[,]π))
8381, 82syl 17 . . 3 (𝜑 → ran 𝑄 ⊆ (-π[,]π))
8474simprd 499 . . . . 5 (𝜑 → (((𝑄‘0) = -π ∧ (𝑄𝑀) = π) ∧ ∀𝑖 ∈ (0..^𝑀)(𝑄𝑖) < (𝑄‘(𝑖 + 1))))
8584simplrd 769 . . . 4 (𝜑 → (𝑄𝑀) = π)
86 ffun 6506 . . . . . 6 (𝑄:(0...𝑀)⟶(-π[,]π) → Fun 𝑄)
8781, 86syl 17 . . . . 5 (𝜑 → Fun 𝑄)
8824nnnn0d 11952 . . . . . . . 8 (𝜑𝑀 ∈ ℕ0)
89 nn0uz 12277 . . . . . . . 8 0 = (ℤ‘0)
9088, 89eleqtrdi 2926 . . . . . . 7 (𝜑𝑀 ∈ (ℤ‘0))
91 eluzfz2 12919 . . . . . . 7 (𝑀 ∈ (ℤ‘0) → 𝑀 ∈ (0...𝑀))
9290, 91syl 17 . . . . . 6 (𝜑𝑀 ∈ (0...𝑀))
93 fdm 6511 . . . . . . . 8 (𝑄:(0...𝑀)⟶(-π[,]π) → dom 𝑄 = (0...𝑀))
9481, 93syl 17 . . . . . . 7 (𝜑 → dom 𝑄 = (0...𝑀))
9594eqcomd 2830 . . . . . 6 (𝜑 → (0...𝑀) = dom 𝑄)
9692, 95eleqtrd 2918 . . . . 5 (𝜑𝑀 ∈ dom 𝑄)
97 fvelrn 6835 . . . . 5 ((Fun 𝑄𝑀 ∈ dom 𝑄) → (𝑄𝑀) ∈ ran 𝑄)
9887, 96, 97syl2anc 587 . . . 4 (𝜑 → (𝑄𝑀) ∈ ran 𝑄)
9985, 98eqeltrrd 2917 . . 3 (𝜑 → π ∈ ran 𝑄)
100 fourierdlem113.e . . 3 𝐸 = (𝑥 ∈ ℝ ↦ (𝑥 + ((⌊‘((π − 𝑥) / 𝑇)) · 𝑇)))
101 fourierdlem113.exq . . 3 (𝜑 → (𝐸𝑋) ∈ ran 𝑄)
102 eqid 2824 . . 3 ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})
103 isoeq1 7063 . . . . 5 (𝑔 = 𝑓 → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}))))
10430, 48, 393eqtr4ri 2858 . . . . . 6 ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})
105 isoeq5 7067 . . . . . 6 (({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄}) → (𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄}))))
106104, 105ax-mp 5 . . . . 5 (𝑓 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
107103, 106syl6bb 290 . . . 4 (𝑔 = 𝑓 → (𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄}))))
108107cbviotavw 6310 . . 3 (℩𝑔𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (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)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})))
109 eqid 2824 . . 3 {𝑤 ∈ ((-π + 𝑋)(,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑤 ∈ ((-π + 𝑋)(,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄}
11061, 62, 64, 66, 71, 80, 83, 99, 100, 58, 101, 102, 108, 109fourierdlem51 42729 . 2 (𝜑𝑋 ∈ ran (℩𝑔𝑔 Isom < , < ((0...((♯‘({(-π + 𝑋), (π + 𝑋)} ∪ {𝑤 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑤 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({(-π + 𝑋), (π + 𝑋)} ∪ {𝑦 ∈ ((-π + 𝑋)[,](π + 𝑋)) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}))))
111 fourierdlem113.per . 2 ((𝜑𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹𝑥))
112 ax-resscn 10592 . . . 4 ℝ ⊆ ℂ
113112a1i 11 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → ℝ ⊆ ℂ)
114 ioossre 12795 . . . . . . 7 ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ℝ
115114a1i 11 . . . . . 6 (𝜑 → ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ℝ)
1161, 115fssresd 6535 . . . . 5 (𝜑 → (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℝ)
117112a1i 11 . . . . 5 (𝜑 → ℝ ⊆ ℂ)
118116, 117fssd 6518 . . . 4 (𝜑 → (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℂ)
119118adantr 484 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℂ)
120114a1i 11 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ℝ)
1211, 117fssd 6518 . . . . . . 7 (𝜑𝐹:ℝ⟶ℂ)
122121adantr 484 . . . . . 6 ((𝜑𝑖 ∈ (0..^𝑀)) → 𝐹:ℝ⟶ℂ)
123 ssid 3975 . . . . . . 7 ℝ ⊆ ℝ
124123a1i 11 . . . . . 6 ((𝜑𝑖 ∈ (0..^𝑀)) → ℝ ⊆ ℝ)
125 eqid 2824 . . . . . . 7 (TopOpen‘ℂfld) = (TopOpen‘ℂfld)
126125tgioo2 23414 . . . . . . 7 (topGen‘ran (,)) = ((TopOpen‘ℂfld) ↾t ℝ)
127125, 126dvres 24520 . . . . . 6 (((ℝ ⊆ ℂ ∧ 𝐹:ℝ⟶ℂ) ∧ (ℝ ⊆ ℝ ∧ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ℝ)) → (ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))))
128113, 122, 124, 120, 127syl22anc 837 . . . . 5 ((𝜑𝑖 ∈ (0..^𝑀)) → (ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))))
129128dmeqd 5761 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → dom (ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = dom ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))))
130 ioontr 42078 . . . . . . 7 ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))
131130reseq2i 5837 . . . . . 6 ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
132131dmeqi 5760 . . . . 5 dom ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = dom ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
133132a1i 11 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → dom ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = dom ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))
134 fourierdlem113.dvcn . . . . 5 ((𝜑𝑖 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
135 cncff 23504 . . . . 5 (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ) → ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℂ)
136 fdm 6511 . . . . 5 (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℂ → dom ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
137134, 135, 1363syl 18 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → dom ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
138129, 133, 1373eqtrd 2863 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → dom (ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
139 dvcn 24530 . . 3 (((ℝ ⊆ ℂ ∧ (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℂ ∧ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ℝ) ∧ dom (ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
140113, 119, 120, 138, 139syl31anc 1370 . 2 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ))
141120, 113sstrd 3963 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ ℂ)
14277adantr 484 . . . . . 6 ((𝜑𝑖 ∈ (0..^𝑀)) → 𝑄:(0...𝑀)⟶ℝ)
143 fzofzp1 13138 . . . . . . 7 (𝑖 ∈ (0..^𝑀) → (𝑖 + 1) ∈ (0...𝑀))
144143adantl 485 . . . . . 6 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑖 + 1) ∈ (0...𝑀))
145142, 144ffvelrnd 6843 . . . . 5 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄‘(𝑖 + 1)) ∈ ℝ)
146145rexrd 10689 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄‘(𝑖 + 1)) ∈ ℝ*)
147 elfzofz 13057 . . . . . 6 (𝑖 ∈ (0..^𝑀) → 𝑖 ∈ (0...𝑀))
148147adantl 485 . . . . 5 ((𝜑𝑖 ∈ (0..^𝑀)) → 𝑖 ∈ (0...𝑀))
149142, 148ffvelrnd 6843 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄𝑖) ∈ ℝ)
15074simprrd 773 . . . . 5 (𝜑 → ∀𝑖 ∈ (0..^𝑀)(𝑄𝑖) < (𝑄‘(𝑖 + 1)))
151150r19.21bi 3203 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄𝑖) < (𝑄‘(𝑖 + 1)))
152125, 146, 149, 151lptioo1cn 42218 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄𝑖) ∈ ((limPt‘(TopOpen‘ℂfld))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))
153116adantr 484 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℝ)
154123a1i 11 . . . . . . . 8 (𝜑 → ℝ ⊆ ℝ)
155117, 121, 154dvbss 24510 . . . . . . 7 (𝜑 → dom (ℝ D 𝐹) ⊆ ℝ)
156 dvfre 24560 . . . . . . . 8 ((𝐹:ℝ⟶ℝ ∧ ℝ ⊆ ℝ) → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
1571, 154, 156syl2anc 587 . . . . . . 7 (𝜑 → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
158 0re 10641 . . . . . . . . . 10 0 ∈ ℝ
15960, 158, 59lttri 10764 . . . . . . . . 9 ((-π < 0 ∧ 0 < π) → -π < π)
16063, 65, 159mp2an 691 . . . . . . . 8 -π < π
161160a1i 11 . . . . . . 7 (𝜑 → -π < π)
16284simplld 767 . . . . . . 7 (𝜑 → (𝑄‘0) = -π)
163134, 135syl 17 . . . . . . . 8 ((𝜑𝑖 ∈ (0..^𝑀)) → ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))):((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))⟶ℂ)
164 fourierdlem113.dvlb . . . . . . . 8 ((𝜑𝑖 ∈ (0..^𝑀)) → (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖)) ≠ ∅)
165163, 141, 152, 164, 125ellimciota 42186 . . . . . . 7 ((𝜑𝑖 ∈ (0..^𝑀)) → (℩𝑥𝑥 ∈ (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖))) ∈ (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖)))
166149rexrd 10689 . . . . . . . . 9 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄𝑖) ∈ ℝ*)
167125, 166, 145, 151lptioo2cn 42217 . . . . . . . 8 ((𝜑𝑖 ∈ (0..^𝑀)) → (𝑄‘(𝑖 + 1)) ∈ ((limPt‘(TopOpen‘ℂfld))‘((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))
168 fourierdlem113.dvub . . . . . . . 8 ((𝜑𝑖 ∈ (0..^𝑀)) → (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1))) ≠ ∅)
169163, 141, 167, 168, 125ellimciota 42186 . . . . . . 7 ((𝜑𝑖 ∈ (0..^𝑀)) → (℩𝑥𝑥 ∈ (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1)))) ∈ (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1))))
170121adantr 484 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℤ) → 𝐹:ℝ⟶ℂ)
171 zre 11982 . . . . . . . . . . . 12 (𝑘 ∈ ℤ → 𝑘 ∈ ℝ)
172171adantl 485 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℤ) → 𝑘 ∈ ℝ)
173 2re 11708 . . . . . . . . . . . . . . 15 2 ∈ ℝ
174173, 59remulcli 10655 . . . . . . . . . . . . . 14 (2 · π) ∈ ℝ
175174a1i 11 . . . . . . . . . . . . 13 (𝜑 → (2 · π) ∈ ℝ)
17669, 175eqeltrid 2920 . . . . . . . . . . . 12 (𝜑𝑇 ∈ ℝ)
177176adantr 484 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℤ) → 𝑇 ∈ ℝ)
178172, 177remulcld 10669 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℤ) → (𝑘 · 𝑇) ∈ ℝ)
179170adantr 484 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ ℝ) → 𝐹:ℝ⟶ℂ)
180177adantr 484 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ ℝ) → 𝑇 ∈ ℝ)
181 simplr 768 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ ℝ) → 𝑘 ∈ ℤ)
182 simpr 488 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ ℝ) → 𝑡 ∈ ℝ)
183111ad4ant14 751 . . . . . . . . . . 11 ((((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ ℝ) ∧ 𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹𝑥))
184179, 180, 181, 182, 183fperiodmul 41866 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ ℝ) → (𝐹‘(𝑡 + (𝑘 · 𝑇))) = (𝐹𝑡))
185 eqid 2824 . . . . . . . . . 10 (ℝ D 𝐹) = (ℝ D 𝐹)
186170, 178, 184, 185fperdvper 42491 . . . . . . . . 9 (((𝜑𝑘 ∈ ℤ) ∧ 𝑡 ∈ dom (ℝ D 𝐹)) → ((𝑡 + (𝑘 · 𝑇)) ∈ dom (ℝ D 𝐹) ∧ ((ℝ D 𝐹)‘(𝑡 + (𝑘 · 𝑇))) = ((ℝ D 𝐹)‘𝑡)))
187186an32s 651 . . . . . . . 8 (((𝜑𝑡 ∈ dom (ℝ D 𝐹)) ∧ 𝑘 ∈ ℤ) → ((𝑡 + (𝑘 · 𝑇)) ∈ dom (ℝ D 𝐹) ∧ ((ℝ D 𝐹)‘(𝑡 + (𝑘 · 𝑇))) = ((ℝ D 𝐹)‘𝑡)))
188187simpld 498 . . . . . . 7 (((𝜑𝑡 ∈ dom (ℝ D 𝐹)) ∧ 𝑘 ∈ ℤ) → (𝑡 + (𝑘 · 𝑇)) ∈ dom (ℝ D 𝐹))
189187simprd 499 . . . . . . 7 (((𝜑𝑡 ∈ dom (ℝ D 𝐹)) ∧ 𝑘 ∈ ℤ) → ((ℝ D 𝐹)‘(𝑡 + (𝑘 · 𝑇))) = ((ℝ D 𝐹)‘𝑡))
190 fveq2 6661 . . . . . . . . 9 (𝑗 = 𝑖 → (𝑄𝑗) = (𝑄𝑖))
191 oveq1 7156 . . . . . . . . . 10 (𝑗 = 𝑖 → (𝑗 + 1) = (𝑖 + 1))
192191fveq2d 6665 . . . . . . . . 9 (𝑗 = 𝑖 → (𝑄‘(𝑗 + 1)) = (𝑄‘(𝑖 + 1)))
193190, 192oveq12d 7167 . . . . . . . 8 (𝑗 = 𝑖 → ((𝑄𝑗)(,)(𝑄‘(𝑗 + 1))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
194193cbvmptv 5155 . . . . . . 7 (𝑗 ∈ (0..^𝑀) ↦ ((𝑄𝑗)(,)(𝑄‘(𝑗 + 1)))) = (𝑖 ∈ (0..^𝑀) ↦ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
195 eqid 2824 . . . . . . 7 (𝑡 ∈ ℝ ↦ (𝑡 + ((⌊‘((π − 𝑡) / 𝑇)) · 𝑇))) = (𝑡 ∈ ℝ ↦ (𝑡 + ((⌊‘((π − 𝑡) / 𝑇)) · 𝑇)))
196155, 157, 61, 62, 161, 71, 24, 77, 162, 85, 134, 165, 169, 188, 189, 194, 195fourierdlem71 42749 . . . . . 6 (𝜑 → ∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
197196adantr 484 . . . . 5 ((𝜑𝑖 ∈ (0..^𝑀)) → ∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
198 nfv 1916 . . . . . . . . 9 𝑡(𝜑𝑖 ∈ (0..^𝑀))
199 nfra1 3213 . . . . . . . . 9 𝑡𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧
200198, 199nfan 1901 . . . . . . . 8 𝑡((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
201128, 131syl6eq 2875 . . . . . . . . . . . . . 14 ((𝜑𝑖 ∈ (0..^𝑀)) → (ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))) = ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))
202201fveq1d 6663 . . . . . . . . . . . . 13 ((𝜑𝑖 ∈ (0..^𝑀)) → ((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡) = (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))‘𝑡))
203 fvres 6680 . . . . . . . . . . . . 13 (𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) → (((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))‘𝑡) = ((ℝ D 𝐹)‘𝑡))
204202, 203sylan9eq 2879 . . . . . . . . . . . 12 (((𝜑𝑖 ∈ (0..^𝑀)) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → ((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡) = ((ℝ D 𝐹)‘𝑡))
205204fveq2d 6665 . . . . . . . . . . 11 (((𝜑𝑖 ∈ (0..^𝑀)) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → (abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) = (abs‘((ℝ D 𝐹)‘𝑡)))
206205adantlr 714 . . . . . . . . . 10 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → (abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) = (abs‘((ℝ D 𝐹)‘𝑡)))
207 simplr 768 . . . . . . . . . . 11 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
208 ssdmres 5863 . . . . . . . . . . . . . 14 (((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ dom (ℝ D 𝐹) ↔ dom ((ℝ D 𝐹) ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) = ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
209137, 208sylibr 237 . . . . . . . . . . . . 13 ((𝜑𝑖 ∈ (0..^𝑀)) → ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ dom (ℝ D 𝐹))
210209ad2antrr 725 . . . . . . . . . . . 12 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) ⊆ dom (ℝ D 𝐹))
211 simpr 488 . . . . . . . . . . . 12 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))))
212210, 211sseldd 3954 . . . . . . . . . . 11 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → 𝑡 ∈ dom (ℝ D 𝐹))
213 rspa 3201 . . . . . . . . . . 11 ((∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧𝑡 ∈ dom (ℝ D 𝐹)) → (abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
214207, 212, 213syl2anc 587 . . . . . . . . . 10 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → (abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧)
215206, 214eqbrtrd 5074 . . . . . . . . 9 ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) ∧ 𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) → (abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) ≤ 𝑧)
216215ex 416 . . . . . . . 8 (((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) → (𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1))) → (abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) ≤ 𝑧))
217200, 216ralrimi 3210 . . . . . . 7 (((𝜑𝑖 ∈ (0..^𝑀)) ∧ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧) → ∀𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))(abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) ≤ 𝑧)
218217ex 416 . . . . . 6 ((𝜑𝑖 ∈ (0..^𝑀)) → (∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧 → ∀𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))(abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) ≤ 𝑧))
219218reximdv 3265 . . . . 5 ((𝜑𝑖 ∈ (0..^𝑀)) → (∃𝑧 ∈ ℝ ∀𝑡 ∈ dom (ℝ D 𝐹)(abs‘((ℝ D 𝐹)‘𝑡)) ≤ 𝑧 → ∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))(abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) ≤ 𝑧))
220197, 219mpd 15 . . . 4 ((𝜑𝑖 ∈ (0..^𝑀)) → ∃𝑧 ∈ ℝ ∀𝑡 ∈ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))(abs‘((ℝ D (𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))))‘𝑡)) ≤ 𝑧)
221149, 145, 153, 138, 220ioodvbdlimc1 42505 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → ((𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖)) ≠ ∅)
222119, 141, 152, 221, 125ellimciota 42186 . 2 ((𝜑𝑖 ∈ (0..^𝑀)) → (℩𝑦𝑦 ∈ ((𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖))) ∈ ((𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄𝑖)))
223149, 145, 153, 138, 220ioodvbdlimc2 42507 . . 3 ((𝜑𝑖 ∈ (0..^𝑀)) → ((𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1))) ≠ ∅)
224119, 141, 167, 223, 125ellimciota 42186 . 2 ((𝜑𝑖 ∈ (0..^𝑀)) → (℩𝑦𝑦 ∈ ((𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1)))) ∈ ((𝐹 ↾ ((𝑄𝑖)(,)(𝑄‘(𝑖 + 1)))) lim (𝑄‘(𝑖 + 1))))
225 frel 6508 . . . . . . 7 ((ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ → Rel (ℝ D 𝐹))
226157, 225syl 17 . . . . . 6 (𝜑 → Rel (ℝ D 𝐹))
227 resindm 5887 . . . . . 6 (Rel (ℝ D 𝐹) → ((ℝ D 𝐹) ↾ ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))) = ((ℝ D 𝐹) ↾ (-∞(,)𝑋)))
228226, 227syl 17 . . . . 5 (𝜑 → ((ℝ D 𝐹) ↾ ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))) = ((ℝ D 𝐹) ↾ (-∞(,)𝑋)))
229 inss2 4191 . . . . . . 7 ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ dom (ℝ D 𝐹)
230229a1i 11 . . . . . 6 (𝜑 → ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ dom (ℝ D 𝐹))
231157, 230fssresd 6535 . . . . 5 (𝜑 → ((ℝ D 𝐹) ↾ ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))):((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))⟶ℝ)
232228, 231feq1dd 41718 . . . 4 (𝜑 → ((ℝ D 𝐹) ↾ (-∞(,)𝑋)):((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))⟶ℝ)
233232, 117fssd 6518 . . 3 (𝜑 → ((ℝ D 𝐹) ↾ (-∞(,)𝑋)):((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))⟶ℂ)
234 ioosscn 12796 . . . . 5 (-∞(,)𝑋) ⊆ ℂ
235 ssinss1 4199 . . . . 5 ((-∞(,)𝑋) ⊆ ℂ → ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ ℂ)
236234, 235ax-mp 5 . . . 4 ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ ℂ
237236a1i 11 . . 3 (𝜑 → ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ ℂ)
238 3simpb 1146 . . . . . . . 8 ((𝜑𝑥 ∈ dom (ℝ D 𝐹) ∧ 𝑘 ∈ ℤ) → (𝜑𝑘 ∈ ℤ))
239 simp2 1134 . . . . . . . 8 ((𝜑𝑥 ∈ dom (ℝ D 𝐹) ∧ 𝑘 ∈ ℤ) → 𝑥 ∈ dom (ℝ D 𝐹))
240170adantr 484 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ ℝ) → 𝐹:ℝ⟶ℂ)
241177adantr 484 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ ℝ) → 𝑇 ∈ ℝ)
242 simplr 768 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ ℝ) → 𝑘 ∈ ℤ)
243 simpr 488 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ ℝ) → 𝑥 ∈ ℝ)
244 eleq1w 2898 . . . . . . . . . . . . . 14 (𝑥 = 𝑦 → (𝑥 ∈ ℝ ↔ 𝑦 ∈ ℝ))
245244anbi2d 631 . . . . . . . . . . . . 13 (𝑥 = 𝑦 → ((𝜑𝑥 ∈ ℝ) ↔ (𝜑𝑦 ∈ ℝ)))
246 oveq1 7156 . . . . . . . . . . . . . . 15 (𝑥 = 𝑦 → (𝑥 + 𝑇) = (𝑦 + 𝑇))
247246fveq2d 6665 . . . . . . . . . . . . . 14 (𝑥 = 𝑦 → (𝐹‘(𝑥 + 𝑇)) = (𝐹‘(𝑦 + 𝑇)))
248 fveq2 6661 . . . . . . . . . . . . . 14 (𝑥 = 𝑦 → (𝐹𝑥) = (𝐹𝑦))
249247, 248eqeq12d 2840 . . . . . . . . . . . . 13 (𝑥 = 𝑦 → ((𝐹‘(𝑥 + 𝑇)) = (𝐹𝑥) ↔ (𝐹‘(𝑦 + 𝑇)) = (𝐹𝑦)))
250245, 249imbi12d 348 . . . . . . . . . . . 12 (𝑥 = 𝑦 → (((𝜑𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹𝑥)) ↔ ((𝜑𝑦 ∈ ℝ) → (𝐹‘(𝑦 + 𝑇)) = (𝐹𝑦))))
251250, 111chvarvv 2006 . . . . . . . . . . 11 ((𝜑𝑦 ∈ ℝ) → (𝐹‘(𝑦 + 𝑇)) = (𝐹𝑦))
252251ad4ant14 751 . . . . . . . . . 10 ((((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (𝐹‘(𝑦 + 𝑇)) = (𝐹𝑦))
253240, 241, 242, 243, 252fperiodmul 41866 . . . . . . . . 9 (((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ ℝ) → (𝐹‘(𝑥 + (𝑘 · 𝑇))) = (𝐹𝑥))
254170, 178, 253, 185fperdvper 42491 . . . . . . . 8 (((𝜑𝑘 ∈ ℤ) ∧ 𝑥 ∈ dom (ℝ D 𝐹)) → ((𝑥 + (𝑘 · 𝑇)) ∈ dom (ℝ D 𝐹) ∧ ((ℝ D 𝐹)‘(𝑥 + (𝑘 · 𝑇))) = ((ℝ D 𝐹)‘𝑥)))
255238, 239, 254syl2anc 587 . . . . . . 7 ((𝜑𝑥 ∈ dom (ℝ D 𝐹) ∧ 𝑘 ∈ ℤ) → ((𝑥 + (𝑘 · 𝑇)) ∈ dom (ℝ D 𝐹) ∧ ((ℝ D 𝐹)‘(𝑥 + (𝑘 · 𝑇))) = ((ℝ D 𝐹)‘𝑥)))
256255simpld 498 . . . . . 6 ((𝜑𝑥 ∈ dom (ℝ D 𝐹) ∧ 𝑘 ∈ ℤ) → (𝑥 + (𝑘 · 𝑇)) ∈ dom (ℝ D 𝐹))
257 oveq2 7157 . . . . . . . . . 10 (𝑤 = 𝑥 → (π − 𝑤) = (π − 𝑥))
258257oveq1d 7164 . . . . . . . . 9 (𝑤 = 𝑥 → ((π − 𝑤) / 𝑇) = ((π − 𝑥) / 𝑇))
259258fveq2d 6665 . . . . . . . 8 (𝑤 = 𝑥 → (⌊‘((π − 𝑤) / 𝑇)) = (⌊‘((π − 𝑥) / 𝑇)))
260259oveq1d 7164 . . . . . . 7 (𝑤 = 𝑥 → ((⌊‘((π − 𝑤) / 𝑇)) · 𝑇) = ((⌊‘((π − 𝑥) / 𝑇)) · 𝑇))
261260cbvmptv 5155 . . . . . 6 (𝑤 ∈ ℝ ↦ ((⌊‘((π − 𝑤) / 𝑇)) · 𝑇)) = (𝑥 ∈ ℝ ↦ ((⌊‘((π − 𝑥) / 𝑇)) · 𝑇))
262 eqid 2824 . . . . . 6 (𝑥 ∈ ℝ ↦ (𝑥 + ((𝑤 ∈ ℝ ↦ ((⌊‘((π − 𝑤) / 𝑇)) · 𝑇))‘𝑥))) = (𝑥 ∈ ℝ ↦ (𝑥 + ((𝑤 ∈ ℝ ↦ ((⌊‘((π − 𝑤) / 𝑇)) · 𝑇))‘𝑥)))
26361, 62, 161, 71, 256, 58, 261, 262, 23, 24, 25, 209fourierdlem41 42720 . . . . 5 (𝜑 → (∃𝑦 ∈ ℝ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) ∧ ∃𝑦 ∈ ℝ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))))
264263simpld 498 . . . 4 (𝜑 → ∃𝑦 ∈ ℝ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)))
265125cnfldtop 23395 . . . . . . . . 9 (TopOpen‘ℂfld) ∈ Top
266265a1i 11 . . . . . . . 8 ((𝜑𝑦 ∈ ℝ ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → (TopOpen‘ℂfld) ∈ Top)
267236a1i 11 . . . . . . . 8 ((𝜑𝑦 ∈ ℝ ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ ℂ)
268 mnfxr 10696 . . . . . . . . . . . 12 -∞ ∈ ℝ*
269268a1i 11 . . . . . . . . . . 11 (𝑦 ∈ ℝ → -∞ ∈ ℝ*)
270 rexr 10685 . . . . . . . . . . . 12 (𝑦 ∈ ℝ → 𝑦 ∈ ℝ*)
271 mnflt 12515 . . . . . . . . . . . 12 (𝑦 ∈ ℝ → -∞ < 𝑦)
272269, 270, 271xrltled 12540 . . . . . . . . . . 11 (𝑦 ∈ ℝ → -∞ ≤ 𝑦)
273 iooss1 12770 . . . . . . . . . . 11 ((-∞ ∈ ℝ* ∧ -∞ ≤ 𝑦) → (𝑦(,)𝑋) ⊆ (-∞(,)𝑋))
274269, 272, 273syl2anc 587 . . . . . . . . . 10 (𝑦 ∈ ℝ → (𝑦(,)𝑋) ⊆ (-∞(,)𝑋))
2752743ad2ant2 1131 . . . . . . . . 9 ((𝜑𝑦 ∈ ℝ ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → (𝑦(,)𝑋) ⊆ (-∞(,)𝑋))
276 simp3 1135 . . . . . . . . 9 ((𝜑𝑦 ∈ ℝ ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))
277275, 276ssind 4194 . . . . . . . 8 ((𝜑𝑦 ∈ ℝ ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → (𝑦(,)𝑋) ⊆ ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)))
278 unicntop 23397 . . . . . . . . 9 ℂ = (TopOpen‘ℂfld)
279278lpss3 21755 . . . . . . . 8 (((TopOpen‘ℂfld) ∈ Top ∧ ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)) ⊆ ℂ ∧ (𝑦(,)𝑋) ⊆ ((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))) → ((limPt‘(TopOpen‘ℂfld))‘(𝑦(,)𝑋)) ⊆ ((limPt‘(TopOpen‘ℂfld))‘((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))))
280266, 267, 277, 279syl3anc 1368 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → ((limPt‘(TopOpen‘ℂfld))‘(𝑦(,)𝑋)) ⊆ ((limPt‘(TopOpen‘ℂfld))‘((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))))
2812803adant3l 1177 . . . . . 6 ((𝜑𝑦 ∈ ℝ ∧ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))) → ((limPt‘(TopOpen‘ℂfld))‘(𝑦(,)𝑋)) ⊆ ((limPt‘(TopOpen‘ℂfld))‘((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))))
2822703ad2ant2 1131 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))) → 𝑦 ∈ ℝ*)
283583ad2ant1 1130 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))) → 𝑋 ∈ ℝ)
284 simp3l 1198 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))) → 𝑦 < 𝑋)
285125, 282, 283, 284lptioo2cn 42217 . . . . . 6 ((𝜑𝑦 ∈ ℝ ∧ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))) → 𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘(𝑦(,)𝑋)))
286281, 285sseldd 3954 . . . . 5 ((𝜑𝑦 ∈ ℝ ∧ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹))) → 𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))))
287286rexlimdv3a 3278 . . . 4 (𝜑 → (∃𝑦 ∈ ℝ (𝑦 < 𝑋 ∧ (𝑦(,)𝑋) ⊆ dom (ℝ D 𝐹)) → 𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘((-∞(,)𝑋) ∩ dom (ℝ D 𝐹)))))
288264, 287mpd 15 . . 3 (𝜑𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘((-∞(,)𝑋) ∩ dom (ℝ D 𝐹))))
289255simprd 499 . . . 4 ((𝜑𝑥 ∈ dom (ℝ D 𝐹) ∧ 𝑘 ∈ ℤ) → ((ℝ D 𝐹)‘(𝑥 + (𝑘 · 𝑇))) = ((ℝ D 𝐹)‘𝑥))
290 oveq2 7157 . . . . . . . 8 (𝑦 = 𝑥 → (π − 𝑦) = (π − 𝑥))
291290oveq1d 7164 . . . . . . 7 (𝑦 = 𝑥 → ((π − 𝑦) / 𝑇) = ((π − 𝑥) / 𝑇))
292291fveq2d 6665 . . . . . 6 (𝑦 = 𝑥 → (⌊‘((π − 𝑦) / 𝑇)) = (⌊‘((π − 𝑥) / 𝑇)))
293292oveq1d 7164 . . . . 5 (𝑦 = 𝑥 → ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇) = ((⌊‘((π − 𝑥) / 𝑇)) · 𝑇))
294293cbvmptv 5155 . . . 4 (𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇)) = (𝑥 ∈ ℝ ↦ ((⌊‘((π − 𝑥) / 𝑇)) · 𝑇))
295 id 22 . . . . . 6 (𝑧 = 𝑥𝑧 = 𝑥)
296 fveq2 6661 . . . . . 6 (𝑧 = 𝑥 → ((𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇))‘𝑧) = ((𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇))‘𝑥))
297295, 296oveq12d 7167 . . . . 5 (𝑧 = 𝑥 → (𝑧 + ((𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇))‘𝑧)) = (𝑥 + ((𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇))‘𝑥)))
298297cbvmptv 5155 . . . 4 (𝑧 ∈ ℝ ↦ (𝑧 + ((𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇))‘𝑧))) = (𝑥 ∈ ℝ ↦ (𝑥 + ((𝑦 ∈ ℝ ↦ ((⌊‘((π − 𝑦) / 𝑇)) · 𝑇))‘𝑥)))
29961, 62, 161, 23, 71, 24, 25, 155, 157, 256, 289, 134, 169, 58, 294, 298fourierdlem49 42727 . . 3 (𝜑 → (((ℝ D 𝐹) ↾ (-∞(,)𝑋)) lim 𝑋) ≠ ∅)
300233, 237, 288, 299, 125ellimciota 42186 . 2 (𝜑 → (℩𝑥𝑥 ∈ (((ℝ D 𝐹) ↾ (-∞(,)𝑋)) lim 𝑋)) ∈ (((ℝ D 𝐹) ↾ (-∞(,)𝑋)) lim 𝑋))
301 resindm 5887 . . . . . 6 (Rel (ℝ D 𝐹) → ((ℝ D 𝐹) ↾ ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))) = ((ℝ D 𝐹) ↾ (𝑋(,)+∞)))
302226, 301syl 17 . . . . 5 (𝜑 → ((ℝ D 𝐹) ↾ ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))) = ((ℝ D 𝐹) ↾ (𝑋(,)+∞)))
303 inss2 4191 . . . . . . 7 ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ dom (ℝ D 𝐹)
304303a1i 11 . . . . . 6 (𝜑 → ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ dom (ℝ D 𝐹))
305157, 304fssresd 6535 . . . . 5 (𝜑 → ((ℝ D 𝐹) ↾ ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))):((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))⟶ℝ)
306302, 305feq1dd 41718 . . . 4 (𝜑 → ((ℝ D 𝐹) ↾ (𝑋(,)+∞)):((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))⟶ℝ)
307306, 117fssd 6518 . . 3 (𝜑 → ((ℝ D 𝐹) ↾ (𝑋(,)+∞)):((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))⟶ℂ)
308 ioosscn 12796 . . . . 5 (𝑋(,)+∞) ⊆ ℂ
309 ssinss1 4199 . . . . 5 ((𝑋(,)+∞) ⊆ ℂ → ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ ℂ)
310308, 309ax-mp 5 . . . 4 ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ ℂ
311310a1i 11 . . 3 (𝜑 → ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ ℂ)
312263simprd 499 . . . 4 (𝜑 → ∃𝑦 ∈ ℝ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)))
313265a1i 11 . . . . . . . 8 ((𝜑𝑦 ∈ ℝ ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → (TopOpen‘ℂfld) ∈ Top)
314310a1i 11 . . . . . . . 8 ((𝜑𝑦 ∈ ℝ ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ ℂ)
315 pnfxr 10693 . . . . . . . . . . . 12 +∞ ∈ ℝ*
316315a1i 11 . . . . . . . . . . 11 (𝑦 ∈ ℝ → +∞ ∈ ℝ*)
317 ltpnf 12512 . . . . . . . . . . . 12 (𝑦 ∈ ℝ → 𝑦 < +∞)
318270, 316, 317xrltled 12540 . . . . . . . . . . 11 (𝑦 ∈ ℝ → 𝑦 ≤ +∞)
319 iooss2 12771 . . . . . . . . . . 11 ((+∞ ∈ ℝ*𝑦 ≤ +∞) → (𝑋(,)𝑦) ⊆ (𝑋(,)+∞))
320316, 318, 319syl2anc 587 . . . . . . . . . 10 (𝑦 ∈ ℝ → (𝑋(,)𝑦) ⊆ (𝑋(,)+∞))
3213203ad2ant2 1131 . . . . . . . . 9 ((𝜑𝑦 ∈ ℝ ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → (𝑋(,)𝑦) ⊆ (𝑋(,)+∞))
322 simp3 1135 . . . . . . . . 9 ((𝜑𝑦 ∈ ℝ ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))
323321, 322ssind 4194 . . . . . . . 8 ((𝜑𝑦 ∈ ℝ ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → (𝑋(,)𝑦) ⊆ ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)))
324278lpss3 21755 . . . . . . . 8 (((TopOpen‘ℂfld) ∈ Top ∧ ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)) ⊆ ℂ ∧ (𝑋(,)𝑦) ⊆ ((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))) → ((limPt‘(TopOpen‘ℂfld))‘(𝑋(,)𝑦)) ⊆ ((limPt‘(TopOpen‘ℂfld))‘((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))))
325313, 314, 323, 324syl3anc 1368 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → ((limPt‘(TopOpen‘ℂfld))‘(𝑋(,)𝑦)) ⊆ ((limPt‘(TopOpen‘ℂfld))‘((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))))
3263253adant3l 1177 . . . . . 6 ((𝜑𝑦 ∈ ℝ ∧ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))) → ((limPt‘(TopOpen‘ℂfld))‘(𝑋(,)𝑦)) ⊆ ((limPt‘(TopOpen‘ℂfld))‘((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))))
3272703ad2ant2 1131 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))) → 𝑦 ∈ ℝ*)
328583ad2ant1 1130 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))) → 𝑋 ∈ ℝ)
329 simp3l 1198 . . . . . . 7 ((𝜑𝑦 ∈ ℝ ∧ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))) → 𝑋 < 𝑦)
330125, 327, 328, 329lptioo1cn 42218 . . . . . 6 ((𝜑𝑦 ∈ ℝ ∧ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))) → 𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘(𝑋(,)𝑦)))
331326, 330sseldd 3954 . . . . 5 ((𝜑𝑦 ∈ ℝ ∧ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹))) → 𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))))
332331rexlimdv3a 3278 . . . 4 (𝜑 → (∃𝑦 ∈ ℝ (𝑋 < 𝑦 ∧ (𝑋(,)𝑦) ⊆ dom (ℝ D 𝐹)) → 𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘((𝑋(,)+∞) ∩ dom (ℝ D 𝐹)))))
333312, 332mpd 15 . . 3 (𝜑𝑋 ∈ ((limPt‘(TopOpen‘ℂfld))‘((𝑋(,)+∞) ∩ dom (ℝ D 𝐹))))
334 biid 264 . . . 4 (((((𝜑𝑖 ∈ (0..^𝑀)) ∧ 𝑤 ∈ ((𝑄𝑖)[,)(𝑄‘(𝑖 + 1)))) ∧ 𝑘 ∈ ℤ) ∧ 𝑤 = (𝑋 + (𝑘 · 𝑇))) ↔ ((((𝜑𝑖 ∈ (0..^𝑀)) ∧ 𝑤 ∈ ((𝑄𝑖)[,)(𝑄‘(𝑖 + 1)))) ∧ 𝑘 ∈ ℤ) ∧ 𝑤 = (𝑋 + (𝑘 · 𝑇))))
33561, 62, 161, 23, 71, 24, 25, 157, 256, 289, 134, 165, 58, 294, 298, 334fourierdlem48 42726 . . 3 (𝜑 → (((ℝ D 𝐹) ↾ (𝑋(,)+∞)) lim 𝑋) ≠ ∅)
336307, 311, 333, 335, 125ellimciota 42186 . 2 (𝜑 → (℩𝑥𝑥 ∈ (((ℝ D 𝐹) ↾ (𝑋(,)+∞)) lim 𝑋)) ∈ (((ℝ D 𝐹) ↾ (𝑋(,)+∞)) lim 𝑋))
337 fourierdlem113.l . 2 (𝜑𝐿 ∈ ((𝐹 ↾ (-∞(,)𝑋)) lim 𝑋))
338 fourierdlem113.r . 2 (𝜑𝑅 ∈ ((𝐹 ↾ (𝑋(,)+∞)) lim 𝑋))
339 fourierdlem113.a . 2 𝐴 = (𝑛 ∈ ℕ0 ↦ (∫(-π(,)π)((𝐹𝑥) · (cos‘(𝑛 · 𝑥))) d𝑥 / π))
340 fourierdlem113.b . 2 𝐵 = (𝑛 ∈ ℕ ↦ (∫(-π(,)π)((𝐹𝑥) · (sin‘(𝑛 · 𝑥))) d𝑥 / π))
341 fveq2 6661 . . . . . . . 8 (𝑛 = 𝑘 → (𝐴𝑛) = (𝐴𝑘))
342 oveq1 7156 . . . . . . . . 9 (𝑛 = 𝑘 → (𝑛 · 𝑋) = (𝑘 · 𝑋))
343342fveq2d 6665 . . . . . . . 8 (𝑛 = 𝑘 → (cos‘(𝑛 · 𝑋)) = (cos‘(𝑘 · 𝑋)))
344341, 343oveq12d 7167 . . . . . . 7 (𝑛 = 𝑘 → ((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) = ((𝐴𝑘) · (cos‘(𝑘 · 𝑋))))
345 fveq2 6661 . . . . . . . 8 (𝑛 = 𝑘 → (𝐵𝑛) = (𝐵𝑘))
346342fveq2d 6665 . . . . . . . 8 (𝑛 = 𝑘 → (sin‘(𝑛 · 𝑋)) = (sin‘(𝑘 · 𝑋)))
347345, 346oveq12d 7167 . . . . . . 7 (𝑛 = 𝑘 → ((𝐵𝑛) · (sin‘(𝑛 · 𝑋))) = ((𝐵𝑘) · (sin‘(𝑘 · 𝑋))))
348344, 347oveq12d 7167 . . . . . 6 (𝑛 = 𝑘 → (((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋)))) = (((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋)))))
349348cbvsumv 15053 . . . . 5 Σ𝑛 ∈ (1...𝑚)(((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋)))) = Σ𝑘 ∈ (1...𝑚)(((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋))))
350 oveq2 7157 . . . . . . 7 (𝑗 = 𝑚 → (1...𝑗) = (1...𝑚))
351350eqcomd 2830 . . . . . 6 (𝑗 = 𝑚 → (1...𝑚) = (1...𝑗))
352351sumeq1d 15058 . . . . 5 (𝑗 = 𝑚 → Σ𝑘 ∈ (1...𝑚)(((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑘 ∈ (1...𝑗)(((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋)))))
353349, 352syl5req 2872 . . . 4 (𝑗 = 𝑚 → Σ𝑘 ∈ (1...𝑗)(((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋)))) = Σ𝑛 ∈ (1...𝑚)(((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋)))))
354353oveq2d 7165 . . 3 (𝑗 = 𝑚 → (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑗)(((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋))))) = (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋))))))
355354cbvmptv 5155 . 2 (𝑗 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑘 ∈ (1...𝑗)(((𝐴𝑘) · (cos‘(𝑘 · 𝑋))) + ((𝐵𝑘) · (sin‘(𝑘 · 𝑋)))))) = (𝑚 ∈ ℕ ↦ (((𝐴‘0) / 2) + Σ𝑛 ∈ (1...𝑚)(((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋))))))
356 fourierdlem113.15 . 2 𝑆 = (𝑛 ∈ ℕ ↦ (((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋)))))
357 fdm 6511 . . . . . 6 (𝐹:ℝ⟶ℝ → dom 𝐹 = ℝ)
3581, 357syl 17 . . . . 5 (𝜑 → dom 𝐹 = ℝ)
359358, 154eqsstrd 3991 . . . 4 (𝜑 → dom 𝐹 ⊆ ℝ)
360358feq2d 6489 . . . . 5 (𝜑 → (𝐹:dom 𝐹⟶ℝ ↔ 𝐹:ℝ⟶ℝ))
3611, 360mpbird 260 . . . 4 (𝜑𝐹:dom 𝐹⟶ℝ)
362359sselda 3953 . . . . . . 7 ((𝜑𝑡 ∈ dom 𝐹) → 𝑡 ∈ ℝ)
363362adantr 484 . . . . . 6 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → 𝑡 ∈ ℝ)
364171adantl 485 . . . . . . 7 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℝ)
365177adantlr 714 . . . . . . 7 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → 𝑇 ∈ ℝ)
366364, 365remulcld 10669 . . . . . 6 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → (𝑘 · 𝑇) ∈ ℝ)
367363, 366readdcld 10668 . . . . 5 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → (𝑡 + (𝑘 · 𝑇)) ∈ ℝ)
368358eqcomd 2830 . . . . . 6 (𝜑 → ℝ = dom 𝐹)
369368ad2antrr 725 . . . . 5 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → ℝ = dom 𝐹)
370367, 369eleqtrd 2918 . . . 4 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → (𝑡 + (𝑘 · 𝑇)) ∈ dom 𝐹)
371 id 22 . . . . . 6 ((𝜑𝑘 ∈ ℤ) → (𝜑𝑘 ∈ ℤ))
372371adantlr 714 . . . . 5 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → (𝜑𝑘 ∈ ℤ))
373372, 363, 184syl2anc 587 . . . 4 (((𝜑𝑡 ∈ dom 𝐹) ∧ 𝑘 ∈ ℤ) → (𝐹‘(𝑡 + (𝑘 · 𝑇))) = (𝐹𝑡))
374359, 361, 61, 62, 161, 71, 24, 77, 162, 85, 140, 222, 224, 370, 373, 194, 195fourierdlem71 42749 . . 3 (𝜑 → ∃𝑢 ∈ ℝ ∀𝑡 ∈ dom 𝐹(abs‘(𝐹𝑡)) ≤ 𝑢)
375358raleqdv 3402 . . . 4 (𝜑 → (∀𝑡 ∈ dom 𝐹(abs‘(𝐹𝑡)) ≤ 𝑢 ↔ ∀𝑡 ∈ ℝ (abs‘(𝐹𝑡)) ≤ 𝑢))
376375rexbidv 3289 . . 3 (𝜑 → (∃𝑢 ∈ ℝ ∀𝑡 ∈ dom 𝐹(abs‘(𝐹𝑡)) ≤ 𝑢 ↔ ∃𝑢 ∈ ℝ ∀𝑡 ∈ ℝ (abs‘(𝐹𝑡)) ≤ 𝑢))
377374, 376mpbid 235 . 2 (𝜑 → ∃𝑢 ∈ ℝ ∀𝑡 ∈ ℝ (abs‘(𝐹𝑡)) ≤ 𝑢)
3781, 22, 23, 24, 25, 32, 57, 58, 110, 69, 111, 140, 222, 224, 134, 300, 336, 337, 338, 339, 340, 355, 356, 377, 196, 58fourierdlem112 42790 1 (𝜑 → (seq1( + , 𝑆) ⇝ (((𝐿 + 𝑅) / 2) − ((𝐴‘0) / 2)) ∧ (((𝐴‘0) / 2) + Σ𝑛 ∈ ℕ (((𝐴𝑛) · (cos‘(𝑛 · 𝑋))) + ((𝐵𝑛) · (sin‘(𝑛 · 𝑋))))) = ((𝐿 + 𝑅) / 2)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wa 399  w3a 1084   = wceq 1538  wcel 2115  wne 3014  wral 3133  wrex 3134  {crab 3137  cun 3917  cin 3918  wss 3919  c0 4276  ifcif 4450  {cpr 4552   class class class wbr 5052  cmpt 5132  dom cdm 5542  ran crn 5543  cres 5544  Rel wrel 5547  cio 6300  Fun wfun 6337  wf 6339  cfv 6343   Isom wiso 6344  (class class class)co 7149  m cmap 8402  Fincfn 8505  cc 10533  cr 10534  0cc0 10535  1c1 10536   + caddc 10538   · cmul 10540  +∞cpnf 10670  -∞cmnf 10671  *cxr 10672   < clt 10673  cle 10674  cmin 10868  -cneg 10869   / cdiv 11295  cn 11634  2c2 11689  0cn0 11894  cz 11978  cuz 12240  (,)cioo 12735  (,]cioc 12736  [,)cico 12737  [,]cicc 12738  ...cfz 12894  ..^cfzo 13037  cfl 13164   mod cmo 13241  seqcseq 13373  chash 13695  abscabs 14593  cli 14841  Σcsu 15042  sincsin 15417  cosccos 15418  πcpi 15420  TopOpenctopn 16695  topGenctg 16711  fldccnfld 20098  Topctop 21504  intcnt 21628  limPtclp 21745  cnccncf 23487  citg 24228   lim climc 24471   D cdv 24472
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2179  ax-ext 2796  ax-rep 5176  ax-sep 5189  ax-nul 5196  ax-pow 5253  ax-pr 5317  ax-un 7455  ax-inf2 9101  ax-cc 9855  ax-cnex 10591  ax-resscn 10592  ax-1cn 10593  ax-icn 10594  ax-addcl 10595  ax-addrcl 10596  ax-mulcl 10597  ax-mulrcl 10598  ax-mulcom 10599  ax-addass 10600  ax-mulass 10601  ax-distr 10602  ax-i2m1 10603  ax-1ne0 10604  ax-1rid 10605  ax-rnegex 10606  ax-rrecex 10607  ax-cnre 10608  ax-pre-lttri 10609  ax-pre-lttrn 10610  ax-pre-ltadd 10611  ax-pre-mulgt0 10612  ax-pre-sup 10613  ax-addf 10614  ax-mulf 10615
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2071  df-mo 2624  df-eu 2655  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2964  df-ne 3015  df-nel 3119  df-ral 3138  df-rex 3139  df-reu 3140  df-rmo 3141  df-rab 3142  df-v 3482  df-sbc 3759  df-csb 3867  df-dif 3922  df-un 3924  df-in 3926  df-ss 3936  df-pss 3938  df-symdif 4204  df-nul 4277  df-if 4451  df-pw 4524  df-sn 4551  df-pr 4553  df-tp 4555  df-op 4557  df-uni 4825  df-int 4863  df-iun 4907  df-iin 4908  df-disj 5018  df-br 5053  df-opab 5115  df-mpt 5133  df-tr 5159  df-id 5447  df-eprel 5452  df-po 5461  df-so 5462  df-fr 5501  df-se 5502  df-we 5503  df-xp 5548  df-rel 5549  df-cnv 5550  df-co 5551  df-dm 5552  df-rn 5553  df-res 5554  df-ima 5555  df-pred 6135  df-ord 6181  df-on 6182  df-lim 6183  df-suc 6184  df-iota 6302  df-fun 6345  df-fn 6346  df-f 6347  df-f1 6348  df-fo 6349  df-f1o 6350  df-fv 6351  df-isom 6352  df-riota 7107  df-ov 7152  df-oprab 7153  df-mpo 7154  df-of 7403  df-ofr 7404  df-om 7575  df-1st 7684  df-2nd 7685  df-supp 7827  df-wrecs 7943  df-recs 8004  df-rdg 8042  df-1o 8098  df-2o 8099  df-oadd 8102  df-omul 8103  df-er 8285  df-map 8404  df-pm 8405  df-ixp 8458  df-en 8506  df-dom 8507  df-sdom 8508  df-fin 8509  df-fsupp 8831  df-fi 8872  df-sup 8903  df-inf 8904  df-oi 8971  df-dju 9327  df-card 9365  df-acn 9368  df-pnf 10675  df-mnf 10676  df-xr 10677  df-ltxr 10678  df-le 10679  df-sub 10870  df-neg 10871  df-div 11296  df-nn 11635  df-2 11697  df-3 11698  df-4 11699  df-5 11700  df-6 11701  df-7 11702  df-8 11703  df-9 11704  df-n0 11895  df-xnn0 11965  df-z 11979  df-dec 12096  df-uz 12241  df-q 12346  df-rp 12387  df-xneg 12504  df-xadd 12505  df-xmul 12506  df-ioo 12739  df-ioc 12740  df-ico 12741  df-icc 12742  df-fz 12895  df-fzo 13038  df-fl 13166  df-mod 13242  df-seq 13374  df-exp 13435  df-fac 13639  df-bc 13668  df-hash 13696  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 20090  df-xmet 20091  df-met 20092  df-bl 20093  df-mopn 20094  df-fbas 20095  df-fg 20096  df-cnfld 20099  df-top 21505  df-topon 21522  df-topsp 21544  df-bases 21557  df-cld 21630  df-ntr 21631  df-cls 21632  df-nei 21709  df-lp 21747  df-perf 21748  df-cn 21838  df-cnp 21839  df-t1 21925  df-haus 21926  df-cmp 21998  df-tx 22173  df-hmeo 22366  df-fil 22457  df-fm 22549  df-flim 22550  df-flf 22551  df-xms 22933  df-ms 22934  df-tms 22935  df-cncf 23489  df-ovol 24074  df-vol 24075  df-mbf 24229  df-itg1 24230  df-itg2 24231  df-ibl 24232  df-itg 24233  df-0p 24280  df-ditg 24456  df-limc 24475  df-dv 24476
This theorem is referenced by:  fourierdlem114  42792
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