# \#cosmology

**URL:** https://discourse.julialang.org/tag/cosmology/907.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

---

## [\[ANN\] SymBoltz.jl: a symbolic-numeric, approximation-free and differentiable linear Einstein-Boltzmann solver for cosmology](https://discourse.julialang.org/t/ann-symboltz-jl-a-symbolic-numeric-approximation-free-and-differentiable-linear-einstein-boltzmann-solver-for-cosmology/132819)

<div class="topic-metadata">

**Author:** [@hersle](https://discourse.julialang.org/u/hersle)\
**Replies:** 19\
**Last updated:** [March 16, 2026, 11:24am UTC](https://discourse.julialang.org/t/ann-symboltz-jl-a-symbolic-numeric-approximation-free-and-differentiable-linear-einstein-boltzmann-solver-for-cosmology/132819 "2026-03-16T11:24:25Z")

</div>

SymBoltz.jl is a new Julia package for solving the linear Einstein-Boltzmann equations in cosmology. It is a “Boltzmann code” similar to CAMB (in Fortran + Python) and CLASS (in C + Python), which are the two most popula…

---

## [\[ANN\] Cosmology on the sphere with PowerSpectra.jl, WignerFamilies.jl, and Healpix.jl 3.0](https://discourse.julialang.org/t/ann-cosmology-on-the-sphere-with-powerspectra-jl-wignerfamilies-jl-and-healpix-jl-3-0/73799)

<div class="topic-metadata">

**Author:** [@xzackli](https://discourse.julialang.org/u/xzackli)\
**Replies:** 0\
**Last updated:** [December 30, 2021, 1:24am UTC](https://discourse.julialang.org/t/ann-cosmology-on-the-sphere-with-powerspectra-jl-wignerfamilies-jl-and-healpix-jl-3-0/73799 "2021-12-30T01:24:14Z")

</div>

Here are some related packages for the analysis of sky maps. In cosmology, this is sometimes called “curved sky” data analysis, since observations are made on the celestial sphere. These packages have been around for a w…