paper

The Tanaka-Thomas's Vafa-Witten invariants via surface Deligne-Mumford stacks

arXiv:1903.11477

Abstract

We provide a definition of Vafa-Witten invariants for projective surface Deligne-Mumford stacks, generalizing the construction of Tanaka-Thomas on the Vafa-Witten invariants for projective surfaces inspired by the S-duality conjecture. We give calculations for a root stack over a general type quintic surface, and quintic surfaces with ADE singularities. The relationship between the Vafa-Witten invariants of quintic surfaces with ADE singularities and the Vafa-Witten invariants of their crepant resolutions is also discussed.

arXiv comment42 pages, comments are very welcome. revised according to the referee, Proposition 4.6 in the old version is corrected. Published version

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