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Fourier 1st step?
How to find fourier transform of a series of the such form: $$y_k=\left[f(x) \right]^{2},$$ but I am not sure of the step by step for going about this computation.
how is the first step??
thank you very much!!
2026-04-13 23:46:19.1776123979
Squared Series Fourier
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Integration by parts. You're doing an integral of the form $$ \int (f(x))^2 \exp(i\xi x) dx $$
Let $u = (f(x))^2$ and $dv = \exp(i \xi x)$.