fftl 2022.7.13

generalised FFTLog

fftl — generalised FFTLog for Python

The fftl package for Python contains a routine to calculate integral transforms of the type ã(k) = ∫ a(r) T(kr) dr for arbitrary kernels T. It uses a modified FFTLog[^2] method of Hamilton[^1] to efficiently compute the transform on logarithmic input and output grids.

The package only requires numpy. To install with pip:

pip install fftl

[^1]: Hamilton A. J. S., 2000, MNRAS, 312, 257 (astro-ph/9905191) [^2]: Talman J. D., 1978, J. Comp. Phys., 29, 35