| import OAI.Analysis.IrrationalRotation.Model.Fejer | |
| namespace OAI | |
| noncomputable section | |
| open MeasureTheory | |
| namespace Invariant233.Fejer | |
| def approximation (H : ℕ) (f : Circle → ℝ) (x : Circle) : ℝ := | |
| ∫ y, kernel H (x - y) * f y | |
| def approximationCoefficient (H : ℕ) (f : Circle → ℝ) (v : ℤ) : ℂ := | |
| coefficient H v * ∫ y, fourier (-v) y * (f y : ℂ) | |
| end Invariant233.Fejer | |
| end | |
| end OAI | |