PySR paper is out!

[MilesCranmer]

This is long-overdue but I finally finished a methods paper describing the algorithm in PySR and SymbolicRegression.jl. You can find it here: https://github.com/MilesCranmer/pysr_paper and the arXiv here: https://arxiv.org/abs/2305.01582.

I consider this paper to be a "v1," based on an older version of the codebase. I would like to write additional papers in the future describing major updates, and I plan to invite any significant open-source contributors to be co-authors!