8 Fourier Series - math psu edu

    The coefficients an and bn are called the Fourier coefficients of f and the series a0 2 + X∞ n=1 [an cosnx+bn sinnx] the Fourier series of f. We denote this fact by f(x) ∼ a0 2 + X∞ n=1 [an cosnx+bn sinnx]. The symbol ∼ should be read as f “has Fourier serier”.

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