What is it?

This will be a workshop in Algebraic Geometry. The intended participant (you) is a graduate student, or a post-doc, or even a senior researcher. Roughly the idea is that you will learn about and work on a single topic in a small group together with a mentor for a week with the aim of producing a text that will be considered for inclusion in the Stacks project. Part of this process will be seeing how one builds new theory from the foundations. There will also be some talks each day covering advanced topics in algebraic geometry.

The Stacks project workshop will have some optional activities you won't see at other workshops. Adding references to and finding mistakes in the Stacks project (and fixing them) as well as activities related to the use of LaTeX, Git, and GitHub. Overall these will be aimed at helping you contribute efficiently to the Stacks project.

For those who are interested, we will also discuss how it is possible to contribute to the software that runs the Stacks project.

Date and location

The workshop will be at the University of Michigan in Ann Arbor, from July 31 to August 4, 2017.

Mentors and topics

The following is a list of possible topics for the workshop. More details may be found on GitHub.

  1. Dimension theory of algebraic stacks
  2. Coarse moduli spaces for (not necessarily Deligne–Mumford) algebraic stacks
  3. Limit formalism
  4. Picard schemes and spaces
  5. Hilbert-Mumford criterion for GIT (semi-)stability
  6. Weil restriction
  7. Picard stacks
  8. Semi-stable reduction for abelian varieties
  9. Moduli of complexes à la Lieblich
  10. Artin's theorem on existence of contractions
  11. Artin's axioms in examples


The workshop is being organized by

To contact the organisers, please send an email to stacksprojectworkshop@gmail.com.


Registration is closed, no further applicants are accepted.