**Email:** cassr[at]umich[dot]edu

Since Fall 2023 I am an RTG Postdoctoral Assistant Professor at the University of Michigan. Previously (2022-2023) I was an NSF Postdoctoral Assistant Professor and Research Fellow, sponsored by Charlotte Chan.

My research interests include the Langlands program and related topics in algebraic geometry and representation theory. I am particularly interested in the application of ideas from the geometric Langlands program and motivic homotopy theory.

In 2021-2022 I was an NSF Postdoctoral Scholar at Caltech, where my sponsor was Xinwen Zhu. I received my Ph.D. in mathematics at Harvard University in 2021, advised by Mark Kisin. I completed my B.S. in mathematics at the University of Kentucky in 2016.

Geometrization of the Satake transform for mod p Hecke algebras (with Yujie Xu), Preprint, 2022.

The geometric Satake equivalence for integral motives (with Thibaud van den Hove and Jakob Scholbach), Preprint, 2022.

Constant term functors with F_p-coefficients (with Cédric Pépin), accepted in **Documenta Mathematica**.

Central elements in affine mod p Hecke algebras via perverse F_p-sheaves, **Compositio Mathematica** 157 (2021), 2215–2241.

Perverse F_p-sheaves on the affine Grassmannian, **Journal für die Reine und Angewandte Mathematik** 785 (2022), 219–272.

Here are the arXiv versions of my papers.

University of Michigan Commutative Algebra Seminar - November 13, 2023

Geometric and Categorical Representation Theory at Besse-et-Saint-Anastaise - October 23-27, 2023

Michigan State University Algebra Seminar - October 18, 2023

Columbia University Automorphic Forms and Arithmetic Seminar - February 17, 2023

University of Padua Algebraic Geometry and Number Theory Seminar - February 13, 2023

Caltech Algebra & Geometry Seminar - May 16, 2022

MIT Lie Groups Seminar - April 6, 2022

UCLA Number Theory Seminar - March 7, 2022

Motives and Representation Theory at the University of Münster and Sydney - September 28, 2021

Representations of p-adic groups and Langlands correspondences at the CMS 75th +1 Anniversary Summer Meeting in Ottawa, Canada - June 8, 2021

UCLA Number Theory Seminar - March 1, 2021

University of Münster Arithmetic Geometry Seminar - December 8, 2020

University of Maryland Lie Groups and Representation Theory Seminar - September 14, 2020

Harvard Number Theory Seminar - September 9, 2020

Recent Advances in Modern p-Adic Geometry (RAMpAGe) Seminar - August 20, 2020

Graduate Student Plenary Speaker at Number Theory Series in Los Angeles II, Occidental College - February 8, 2020

University of Michigan Algebraic Geometry Seminar - February 5, 2020

Institut de Recherche Mathématique de Rennes, Séminaire de Géométrie Arithmétique - December 19, 2019

L'Institut Galilée, Paris 13, Séminaire de Géométrie Arithmétique et Motivique - December 13, 2019

Yale Algebra and Number Theory Seminar - December 3, 2019

MSRI Hot Topics Workshop: Recent Progress In Langlands Program - April 8, 2019

Clemson University Algebraic Geometry and Number Theory Seminar - March 24, 2015

In 2021-2022 I co-organized the Caltech Algebra & Geometry Seminar.

In 2020-2021 I co-organized the Harvard Number Theory Seminar.

**University of Michigan:**

Math 217: IBL Linear Algebra (two sections) - Fall 2023

**Harvard:**

Matehmatics 21B: Linear Algebra and Differential Equations - Spring 2021

Mathematics MA: Introduction to Functions and Calculus I - Fall 2019

I received a Certificate of Distinction for each of these courses.

Hurwitz schemes - my minor thesis