Pullback is a package that implements pullback for diagrams of rings
Caveat
Works only for maps of rings finitely generated over a base field and one of the two maps is surjective
Authors
Drew Ellingson
Karl Schwede
Version
This documentation describes version 1.03 of Pullback.
Citation
If you have used this package in your research, please cite it as follows:
@misc{PullbackSource,
title = {{Pullback: pullback of rings. Version~1.03}},
author = {Drew Ellingson and Karl Schwede},
howpublished = {A \emph{Macaulay2} package available at
\url{https://github.com/Macaulay2/M2/tree/master/M2/Macaulay2/packages}}
}