Parseval's theorem
From Glossary of Meteorology
Parseval's theorem
A theorem relating the product of two functions to the products of their Fourier series components.
If the functions are f(x) and F(x), and their Fourier series components have respective amplitudes an, bn and An, Bn, Parseval's theorem states that under certain general conditions There is an analogous theorem for Fourier transforms.
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