noun, Physics, Mathematics.
the expression of any periodic function as a sum of sine and cosine functions, as in an electromagnetic wave function.
Compare .
the analysis of a periodic function into its simple sinusoidal or harmonic components, whose sum forms a Fourier series
Fourier analysis
The branch of mathematics concerned with the approximation of periodic functions by the Fourier series and with generalizations of such approximations to a wider class of functions.


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