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SUMMARY:Johannes Nordstrom (University of Bath)
DTSTART:20220303T110000Z
DTEND:20220303T120000Z
DTSTAMP:20260423T052932Z
UID:ZAG/190
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ZAG/190/">K3
  surfaces and twisted connected sum G2-manifolds</a>\nby Johannes Nordstro
 m (University of Bath) as part of ZAG (Zoom Algebraic Geometry) seminar\n\
 n\nAbstract\nThe twisted connected sum construction of Kovalev produces ma
 ny examples of closed Riemannian 7-manifolds with holonomy group G_2 (a sp
 ecial class of Ricci-flat manifolds)\, starting from complex algebraic geo
 metry data like Fano 3-folds. If the pieces admit automorphisms\, then add
 ing an extra twist to the construction yields examples with a wider variet
 y of topological features. I will outline the constructions\, and describe
  how a good understanding of moduli of K3 surfaces appearing as anticanoni
 cal divisors in Fano 3-folds is used in a crucial way to match the pieces 
 in the gluing procedure. This is joint work with Diarmuid Crowley and Seba
 stian Goette.\n
LOCATION:https://researchseminars.org/talk/ZAG/190/
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