Hello all, I just implemented the function *gsl_integration_qawf() *which I need to calculate some Fourier integrals. I'm testing with some simple example like the Fourier transform of a Gaussian function but it is giving me problems: the result is correct exept for very small frequencies, where the functions returns zero as a result (of course the result of the integral of the distribution X cos(omega x) for omega -> 0 should be 1). Is there any known problem with this integration scheme? Or maybe I didn't set properly the parameters?
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