This is a small seminar we are running on Étale cohomology over the summer organized by myself and Vidhu Adhihetty.

Location: Room 622
Meeting Time: Thursdays 11:00am EST
Syllabus: Found here

1. Introduction

Vidhu Adhihetty 06/19/25

We introduce the Weil conjectures as motivation for Étale cohomology and go over étale morphisms. Notes available here.

2. Sites and Sheaves

Wenqi Li 6/26/25

We introduce the notion of a site and a Grothendieck topology. We then prove faithfully flat descent. Notes available here.

3. More on sheaves

Nicolás Vilches 7/3/25

We continue the discussion from last week, specializing to sheaves on the étale sites. Notes available here.