1. Fourier coefficients of a 2π function – periodic

1.1 Classes of locally integrable functions

We will need the following simple orthogonality relations, where δ _{p, q} denotes the Kronecker symbol: $\int_{0}^{2 π} e^{i (p - q) t} \frac{d t}{2 π} = δ_{p, q}$

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Fourier coefficients of a 2π function – periodic

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References

(1) - DAVIS (P.) - Interpolation and approximation.
(2) - KUIPERS (L.), NIEDERREITER (H.) - Uniform distribution of sequences. - Wiley-Interscience Series, 1974.
(3) - ZYGMUND (A.) - Trigonometric...

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