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noun, Mathematics.
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.
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


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