hankl: A lightweight Python implementation of the FFTLog algorithm for Cosmology

We introduce hankl, a lightweight Python implementation of the FFTLog algorithm for Cosmology. The FFTLog algorithm is an extension of the usual Fast Fourier Transform (FFT) for logarithmically spaced periodic sequences. It can be used to efficiently compute Hankel transformations which are paramount for many modern cosmological analyses that are based on the power spectrum or the 2-point correlation function multipoles. The code is well-tested, open source, and publicly available at https://github.com/minaskar/hankl.

{"references": ["Hamilton, AJS (2000). Uncorrelated modes off the non-linear power spectrum. Monthly Notices of the Royal Astronomical Society, 312(2), 257-284", "Talman, James D (1978). Numerical Fourier and Bessel transforms in logarithmic variables. Journal of computational physics, 29(1), 35-48"]}

https://github.com/minaskar/hankl

Related Organizations

University of Edinburgh
United Kingdom

Keywords

Integral, Astronomy, FFTLog, Transform, Hankel, Cosmology, Python

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