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math.AG2025
Transfers and Unstable Degrees in the -Brouwer Degrees Package for Macaulay2
Stephanie Atherton, Somak Dutta, Jordy Lopez Garcia +4
We describe a significant update to the Macaulay2 package A1BrouwerDegrees. We extend several methods in the previous version of the package to the setting of finite étale algebras…
math.CO2025
Generalized chip firing and critical groups of arithmetical structures on trees
Kassie Archer, Alexander Diaz-Lopez, Darren Glass +1
Chip firing provides a way to study the sandpile group (also known as the Jacobian) of a graph. We use a generalized version of chip firing to bound the number of invariant factors…