Fourier Transform, Fft, Fast Fourier Transform, Algorithms, Mathematics.
T/2–1, we can obtain F(v) for v=0 to T/2–1. Also we can re-use the same G and H values to find F(v) from T/2 to T-1. Here is a python implementation using recursion. def fft(x): n = len(x) if n == 1: return x even_fft = fft(x[::2]) odd_fft = fft(x[1::2]) twiddle_factors =