用于FFT,来自MIT的源码，获数学大奖的成果-For the FFT, the source code from MIT, was the outcome of Mathematics Award

该程序为fftw的简化高效版，fftw为MIT的开源fft程序，功能非常强大。包括范围也很广。这个为简单版本。-The program for high-performance version of fftw simplified, fftw for MIT s open source fft procedure, very powerful. Including a very wide scope. This for the simple version.