spectral approximation
spectral approximation
[‚spek·trəl ə‚prȧk·sə′mā·shən] (mathematics)
A numerical approximation of a function of two or more variables that involves the expansion of the function into a generalized Fourier series, followed by computation of the Fourier coefficients.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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