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Libraries available to download (D-L)
FFTW - Fast C library for computing the Fast Fourier Transform (FFT)
FFTW is a C library for performing the FFT in one or more dimensions.
It also includes real-complex and parallel transforms. In our
benchmarks, FFTW compares favorably to other portable codes for
most platforms and transform sizes, and is often competitive with
vendor-tuned libraries for specific machines.
Licensing : GNU copyleft
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