An Algol Procedure for the Fast Fourier Transform with Arbitrary Factors (Algorithm 339 [C6]) CACM March, 1969 Singleton, R. C. fast Fourier transform, complex Fourier transform, multivariate Fourier transform, Fourier series, harmonic analysis, spectral analysis, orthogonal polynomials, orthogonal transformation, virtual core memory, permutation 3.15 3.83 5.12 5.14 CA690310 JB February 20, 1978 8:43 AM 1917 5 1917 1917 5 1917 1917 5 1917