FAQ

Is stringjax a physics package? No. It is an install-only umbrella that pulls in the member packages and provides the stringjax command. Do your science by importing the members directly, e.g. import jaxvacua as jvc.

Do I have to install stringjax to use JAXVacua? No. Every member package installs and runs independently (pip install jaxvacua). stringjax is a convenience for installing the whole ecosystem at compatible versions in one step.

Why does the umbrella use MIT while JAXVacua is GPL-3.0? The metapackage contains no physics code, so it can be permissive. Using the ecosystem still pulls in jaxvacua, and your usage is subject to its GPL-3.0 terms.

How do I get GPU/TPU acceleration? Install the matching JAX wheel after stringjax; see Installation.

My results aren’t reproducible across machines. JIT and accelerator reductions are not guaranteed bit-identical across hardware. Fix the backend and precision, pin versions via constraints.txt, and record stringjax doctor output. See Compatibility matrix.

Which package do I cite? Cite the specific package(s) you used (JAXVacua, JAXPolyLog, StringForge), not the umbrella. BibTeX is provided in each member’s documentation.