Richard Thomas - Vafa-Witten Invariants of Projective Surfaces 2/5
Channel: Institut des Hautes Études Scientifiques (IHÉS)
Date: 2021-07-07

This course has 4 sections split over 5 lectures. The first section will be the longest, and hopefully useful for the other courses.

- Sheaves, moduli and virtual cycles
- Vafa-Witten invariants: stable and semistable cases
- Techniques for calculation --- virtual degeneracy loci, cosection localisation and a vanishing theorem
- Refined Vafa-Witten invariants