https://bugzilla.redhat.com/show_bug.cgi?id=2467501
Bug ID: 2467501
Summary: Review Request: libwigner - Exact Wigner 3j/6j/9j
symbols and related coefficients via prime
factorization
Product: Fedora
Version: rawhide
Hardware: All
OS: Linux
Status: NEW
Component: Package Review
Severity: medium
Priority: medium
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected]
Target Milestone: ---
Classification: Fedora
Spec URL: https://jussilehtola.fedorapeople.org/libwignernj.spec
SRPM URL:
https://jussilehtola.fedorapeople.org/libwignernj-0.3.0-1.fc44.src.rpm
Fedora Account System Username: jussilehtola
Description:
libwignernj is a C99 library for the exact evaluation of Wigner 3j, 6j and
9j symbols, Clebsch-Gordan coefficients, Racah W coefficients, Fano X
coefficients, and Gaunt coefficients (over both complex and real spherical
harmonics) using the prime-factorization scheme of Johansson and Forssen.
All intermediate arithmetic is exact integer arithmetic; floating-point
conversion happens only at the final step, so the returned values are
correct to the last representable bit of the chosen output type: float,
double, long double, IEEE 754 binary128 (via libquadmath), or, through
the optional GNU MPFR back-end, arbitrary precision. Bindings are
provided for C, C++11 (header-only), Fortran 90 (iso_c_binding) and
Python 3.
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