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DTSTAMP:20221207T032220Z
UID:20221207T022220-1004521716@www.mn.uio.no
DTSTART:20221110T131500Z
DTEND:20221110T150000Z
LOCATION:NHA B1120
DESCRIPTION:As a consequence of the S-duality conjecture, Vafa and Witten
conjectured certain symmetries concerning invariants derived from spaces
of vector bundles on a closed Riemannian four-manifold. For a smooth comp
lex projective surface X, a satisfying mathematical definition of Vafa-Wi
tten invariants has been given by Tanaka and Thomas. Their invariants are
a sum of two parts, one of which can be defined in terms of moduli space
s of stable vector bundles on X. Focusing on this instanton part of the V
W invariants one can ask how it changes under blowing up the surface X. I
will discuss joint work with Oliver Leigh and Yuuji Tanaka that answers
this question.
SUMMARY:Nick Kuhn (UiO) - The blowup formula for instanton Vafa-Witten inv
ariants
URL:https://www.mn.uio.no/math/english/research/groups/algebra/events/semi
nars/2022/kuhn.html
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