Parseval's theorem

(redirected from Parseval theorem)

Parseval's theorem

[′pär·sə·vəlz ′thir·əm]
(mathematics)
A theorem that gives the integral of a product of two functions, ƒ(x) and F (x), in terms of their respective Fourier coefficients; if the coefficients are defined by and similarly for F (x), the relationship is