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While each computer algebra system (CAS) contains its own unique syntax forinputting mathematical expressions, LaTeX is perhaps the most widespreadlanguage for typesetting mathematics. NRPyLaTeX (NL) enables direct LaTeX inputof complex tensorial expressions (written in Einstein notation) relevant togeneral relativity and differential geometry into the SymPy CAS. As SymPy alsosupports output compatible with the Mathematica and Maple CASs, NL lowers thelearning curve for inputting and manipulating tensorial expressions in threewidely used CASs. LaTeX however is a typesetting language, and as such is notdesigned to resolve ambiguities in mathematical expressions. To address this,NL implements a convenient configuration interface that, e.g., definesvariables with certain attributes. Configuration commands appear as LaTeXcomments, so that entire NL workflows can fit seamlessly into the LaTeX sourcecode of scientific papers without interfering with the rendered mathematicalexpressions. Further, NL adopts NRPy+'s rigid syntax for indexed symbols (e.g.,tensors), which enables NL output to be directly converted into highlyoptimized C/C++-code kernels using NRPy+. Finally NL has robust anduser-friendly error-handling, which catches common tensor indexing errors andreports unresolved ambiguities, further expediting the input and validation ofLaTeX expressions into a CAS.

NRPyLaTeX: A LaTeX interface to computer algebra systems for general relativity