... FFTW - Introduction . ... This manual documents version 2.1.3 of FFTW, the Fastest Fourier Transform in the West . FFTW is a comprehensive collection of fast C routines for computing the discrete Fourier transform (DFT) in one or more dimensions, of both real and complex data, and of arbitrary input size. FFTW also includes parallel transforms for both shared- and distributed-memory systems. ... Parallel transforms are discussed in their own chapter Section Parallel FFTW . ... Центры . ...