Parseval's theorem
id:
parseval-s-theorem-176-14972352
title:
Parseval's theorem
text:
In mathematics, Parseval's theorem usually refers to the result that the Fourier transform is unitary; loosely, that the sum of the square of a function is equal to the sum of the square of its transform. It originates from a 1799 theorem about series by Marc-Antoine Parseval, which was later applied to the Fourier series. It is also known as Rayleigh's energy theorem, or Rayleigh's identity, after John William Strutt, Lord Rayleigh. Although the term "Parseval's theorem" is often used to descri
brand slug:
wiki
category slug:
encyclopedia
description:
Theorem in mathematics
original url:
https://en.wikipedia.org/wiki/Parseval%27s_theorem
date created:
2004-06-05T21:30:57Z
date modified:
2024-09-03T18:31:53Z
main entity:
{"identifier":"Q1443036","url":"https://www.wikidata.org/entity/Q1443036"}
image:
fields total:
13
integrity:
15