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I'm looking for an implementation in C of the Winograd Fourier transform
algorithm.  The usual decimation-in-time algorithms are not suitable for
my application as I need to perform FFTs on data sets that are not powers
of two and I do not wish to pad them.  I understand other algorithms are
available to do this, but the Winograd algorithm is supposedly the best
one [1].  Thanks.

[1] - Press, Flannery, Teukolsky, Vetterling: "Numerical Recipies in C",
      p413.

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