In functional analysis, Parseval's identity, also known as Parseval's equality, is the
Pythagorean theorem for inner-product spaces. It states that if B is an orthonormal basis in an inner-product space, then
The origin of the name is in Parseval's theorem for Fourier series, which is a special case.
See also
References
Last updated: 05-07-2005 01:59:02
