Feliks Raczka : D-affinity and related notions over fields of positive characteristic

Posted by Eamon Quinlan-Gallego , part of the Algebraic Geometry Seminar.

At

Jan. 26, 2026, 3 p.m.

In

636 SEO

Abstract

The talk will be devoted to D-affinity of smooth projective varieties over fields of positive characteristic. First, I will recall the notion of a D-affine variety and justify its importance. Then, I will explain how in positive characteristic this notion relates to other properties defined in terms of the Frobenius morphism: the tilting property of Frobenius pushforwards of the structure sheaf, GFFRT, etc. In the last part of the talk I will present the results from my recent preprint https://arxiv.org/abs/2601.13340.