5 papers
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…
A Looming of phantoms
Kimoi Kemboi, Daniel Krashen, Tianle Liu +6
Following Krah's method, we construct new examples of phantom categories as semiorthogonal components of the derived categories of two types of rational surfaces: the blowup of the…
The Clifford algebra of a finite morphism
Daniel Krashen, Max Lieblich
We develop a general theory of Clifford algebras for finite morphisms of schemes and describe applications to the theory of Ulrich bundles and connections to period-index problems…
On rational connectedness and parametrization of finite Galois extensions
Daniel Krashen, Danny Neftin
Given two -Galois extensions of , is there an extension of that specializes to both? The equivalence relation on -Galois extension of , i…
Morita equivalences for Zhu's algebra
Chiara Damiolini, Angela Gibney, Daniel Krashen
Through the introduction of new ideals, and with the assistance of the -th mode transition algebras , for , we show how Zhu's associative algebr…