Copula-constructed non-Gaussian likelihoods for weak-lensing correlations match simulations better than Gaussians on large scales, yet produce only negligible shifts in S8 for 10 000 deg² surveys.
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libwignernj is a library that evaluates standard Wigner symbols and related coefficients exactly to the last floating-point bit by keeping all intermediates as exact rationals using prime-exponent vectors and multiword Racah summation.
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The Non-Gaussian Weak-Lensing Likelihood: A Multivariate Copula Construction and Impact on Cosmological Constraints
Copula-constructed non-Gaussian likelihoods for weak-lensing correlations match simulations better than Gaussians on large scales, yet produce only negligible shifts in S8 for 10 000 deg² surveys.
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libwignernj: a reusable C/C++/Fortran/Python library for exact Wigner symbols and related coefficients
libwignernj is a library that evaluates standard Wigner symbols and related coefficients exactly to the last floating-point bit by keeping all intermediates as exact rationals using prime-exponent vectors and multiword Racah summation.