Convergence of Fourier Series - Magnitude of Fourier Coefficients

Magnitude of Fourier Coefficients

In applications, it is often useful to know the size of the Fourier coefficient.

If is an absolutely continuous function,

for a constant that only depends on .

If is a bounded variation function,

If

If and has modulus of continuity,

and therefore, if is in the α-Hölder class

Read more about this topic:  Convergence Of Fourier Series

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