Learning Seminar on prismatic F-gauge
Fall 2025

Basic information

Organizers: Daniel Le, Tong Liu and Shubhodip Mondal

Lectures:
Monday 2:45-4:15 pm, Math 731.

Topics and Shedule:

Aug. 25th Tong Liu : Introduction to F-gauge

Sep. 8th Boqiang Zhang : Introduction to de Rham cohomology

Title: Algebraic de Rham Cohomology for Schemes

Abstract: Prismatic cohomology can be roughly regarded as a deformation of de Rham cohomology. Consequently, many structures on prismatic cohomology have counterparts for de Rham cohomology that are more classical and more explicit. Our goal of this talk is to understand Section 2.1 of Bhatt’s note, i.e. the notion of algebraic de Rham cohomology. We will first review the classical theory of de Rham cohomology for smooth manifolds and explain the issues arising when switching to complex manifolds and more general algebraic geometric objects like varieties. Then we will introduce the so-called algebraic de Rham cohomology for general schemes and explain why it is the correct cohomology we need. We will also go through the Hodge filtration structure as well as the conjugate filtration structure on algebraic de Rham cohomology, and how they interact with Poincare duality (if permitted). Examples will be given for a better understanding of the above notions.

Sep. 15th Ruipeng Zou: Derivied category and t-structure

Title: Derived Categories and t-structure

Abstract: In this talk, we will review derived categories and t-structure and show that the heart is abelian. If time permits, we will also introduce the stable infinity category, and see for any ring R, there exists a stable infinity category whose homotopy category is the classical derived category D(R).

Sep. 22nd

Sep. 29th

Resources and useful links:

Bhatt's note on primsatic F-gauge

Bhatt's yourtube video on geometrization

Alex Youcis' note on de Rham cohomology

Aug. 20th, 2025