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A comment on Ask HN: Best open source/free software in their own category?.

Re:Ask HN: Best open source/free software in their own categ... by tanderson92 on Friday January 30, 2015 @05:00AM (#8971287)
FFTW -- Fast Discrete Fourier Transform. Reason: it routinely beats proprietary FFT routines on real & complex and single & multidimensional transforms, and with better accuracy.
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