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Refined Vafa-Witten invariants for projective surfaces

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Speaker: 
Richard Thomas
Affiliation: 
Imperial College London
Date: 
Thu, 2018-06-14 10:30 - 12:00
Location: 
MPIM Lecture Hall

I'll describe how to define Vafa-Witten invariants -- and refined Vafa-Witten invariants -- of projective surfaces. Then I'll explain how to calculate some parts of the theory via degeneracy loci and "Carlsson-Okounkov operators". The talk describes different projects joint with Yuuji Tanaka, Davesh Maulik and Amin Gholampour.

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