2 papers
math.AG2026
Finiteness of formal pushforwards
David Harbater, Julia Hartmann, Daniel Krashen
Under mild hypotheses, given a scheme and an open subset whose complement has codimension at least two, the pushforward of a torsion-free coherent sheaf on is coherent…
math.GR2026
Local-global principles for the existence of Levi factors
David Harbater, Julia Hartmann, George McNinch
We discuss local-global principles for the existence of Levi factors (i.e., complements to the unipotent radical) for linear algebraic groups over one-variable function fields. We…