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Fourier Series. Consider a set of eigenfunctions ϕ n that are orthogonal , where orthogonality is defined as. for m ≠ n. An arbitrary function f ( x ) can be expanded as series of these orthogonal eigenfunctions. or. Due to orthogonality , we thus know.
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Fourier Series Consider a set of eigenfunctionsϕn that are orthogonal, where orthogonality is defined as for m ≠ n An arbitrary function f(x) can be expanded as series of these orthogonal eigenfunctions or Due to orthogonality, we thus know all other ϕnAmϕmintegrate to zero because m ≠ n Thus, the constants in the Fourier series are
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