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Parseval's theorem. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Etymology
Named after Marc-Antoine Parseval.
Proper noun
Parseval's theorem
- (mathematics) The result that the Fourier transform is unitary; loosely, that the sum (or integral) of the square of a function is equal to the sum (or integral) of the square of its transform.