Enumerative geometry of Calabi-Yau 4-folds

Feb, 2007
44 pages
Published in:
  • Commun.Math.Phys. 281 (2008) 621-653
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Abstract: (Springer)
Gromov-Witten theory is used to define an enumerative geometry of curves in Calabi-Yau 4-folds. The main technique is to find exact solutions to moving multiple cover integrals. The resulting invariants are analogous to the BPS counts of Gopakumar and Vafa for Calabi-Yau 3-folds. We conjecture the 4-fold invariants to be integers and expect a sheaf theoretic explanation.