Richard Thomas - Vafa-Witten Invariants of Projective Surfaces 1/5
Channel: Institut des Hautes Études Scientifiques (IHÉS)
Date: 2021-07-06

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