On this page, I maintain some links to some Macaulay2 software I have (co-)written or been substantially involved in the writing of.
RationalMaps.m2 A package for studying rational maps between projective varieties. Some documentation is available here.
Seminormalization.m2 A package for seminormalizing rings and varieties. Some documentation is here Preprint.
Pullback.m2 A package for pulling back in the category of rings and thus constructing non-normal rings and varieties.
Divisor.m2 A package for working with Weil divisors on affine and projective varieties. Some documentation is here Published paper.
TestIdeals and FThresholds (+ PosChar)
TestIdeals.m2 The link to the development version of the TestIdeals.m2 package. To download the package in one file, click here (for use in Habanero).
FThresholds.m2 The link to the development version of the TestIdeals.m2 package. To download the package in one file, click here (for use in Habanero).
Paper documenting TestIdeals.m2.
Slides describing TestIdeals.m2.
PosChar.m2 An early version of the package for doing computations of F-singularities within Macaulay2 (updated 6/10/2014). Here is some (slightly outdated) additional documentation in in PDF format. This is joint work with Daniel Hernandez, Moty Katzman, Sara Malec, Pedro Teixeira and Emily Witt
Here are some smaller projects which have since been included in TestIdeals/FThresholds.
Finj.m2 Code for computing whether a given ring is F-injective currently it requires the ring to be graded. This was written down with Anurag K. Singh.
FSplitting.m2 Code for computing the compatibly Frobenius split subvarieties of a given variety. This was done jointly with Moty Katzman