ToolPythonAdvanced Fourier spectral method for KdV: two solitons pass through each other return keep * np.conj(E) * (-3j * k * rfft(u * u, norm="forward"))
ToolPythonBeginner MRI k-space reconstruction with numpy.fft: shifts, fold-over, ringing step = np.angle(np.sum((image[:, 1:] * np.conj(image[:, :-1]))[bright]))