fou-rier analysis
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Fourier analysis — Fou′rier anal ysis n. math. the expression of any periodic function as a sum of sine and cosine functions, as in an electromagnetic wave function • Etymology: 1925–30; after J.B.J. Fourier … From formal English to slang
Fourier series — Fou′rier se ries n. math. an infinite series that approximates a given function on a specified domain by using linear combinations of sines and cosines • Etymology: 1875–80; see Fourier analysis … From formal English to slang
