Fast Fourier transform

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Invented by James W. Cooley and John W. Tukey in 1965 (Ref 1). The fast Fourier transform reduces the number of operations from N2 to NlnN.

References

  1. James W. Cooley and John W. Tukey", "An Algorithm for the Machine Calculation of Complex Fourier Series", Mathematics of Computation 19 pp. 297-301 (1965)