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Fourier transform

noun, Mathematics
1.
a mapping of a function, as a signal, that is defined in one domain, as space or time, into another domain, as wavelength or frequency, where the function is represented in terms of sines and cosines.
Origin
1920-1925
1920-25; see Fourier analysis
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for fourier trans-form

Fourier transform

noun
1.
an integral transform, used in many branches of science, of the form F(x) = [1/√(2π)]ʃeixyf(y)dy, where the limits of integration are from –∞ to +∞ and the function F is the transform of the function f
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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