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math.AG2024
A new formulation of regular singularity
Avi Steiner
We provide an alternative definition for the familiar concept of regular singularity for meromorphic connections. Our new formulation does not use derived categories, and it also a…
math.AG2023
Quatroids and Rational Plane Cubics
Taylor Brysiewicz, Fulvio Gesmundo, Avi Steiner
It is a classical result that there are (irreducible) rational cubic curves through generic points in , but little is known about the non-generi…
math.AG2018
Dualizing, projecting, and restricting GKZ systems
Avi Steiner
Let be an integer matrix, and assume that its semigroup ring is normal. Fix a face of the cone of . We show that the projection and restriction…