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2003 Fiscal Year Final Research Report Summary

Problems in Enumerative Geometry Related to String Theory and Their Relations to Automorphic Forms

Research Project

Project/Area Number 13640017
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Algebra
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KAWAI Toshiya  Kyoto,University, RIMS, Associate Professor, 数理解析研究所, 助教授 (20293970)

Project Period (FY) 2001 – 2003
KeywordsString Duality / Calabi-Yau manifolds / Gromov-Witten invariants / Jacobi forms / Elliptic cohomology
Research Abstract

The first result of this research project is that, based on string duality conjecture, I uniformly constructed conjectural expressions of the Gromov-Witten potentials of elliptic Calabi-Yau threefolds with sections fibered over Hirzebruch surfaces in a certain limit by investigating appropriate conformal field theories on elliptic curves. I made various non-trivial consistency checks on this result. This research revealed various rich relations to elliptic cohomology, Borcherds products, Jacobi forms and hyperbolic reflection groups. I am currently preparing a paper for the results I obtained.
The second result of this project has already been reported as an article ("String and Vortex"). It is about the properties of Gromov-Witten potentials of generic Calabi-Yau threefolds. In my previous work with Kota Yoshioka we proposed some connections between relative Hilbert schemes of points on curves and Gromov-Witten invariants. This was based on the experience on specific Calabi-Yau threefolds. In the present work I extended this proposal for more general cases. On the other hand there was another proposal by Gopakumar and Vafa in which the relative compactified Jacobians are relevant. I discussed the consistency of the two proposals in favorable situations. Along the way I found a formula for the Euler characteristic of Hilbert schemes of points on nodal curves which may be viewed as a non-trivial generalization of Macdonald's classical formula on the Euler characteristic of symmetric products of non-singular curves.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] 河合 俊哉: "String and Vortex"Publ.RIMS. (掲載予定).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] KAWAI, Toshiya: "String and Vortex"Publ.RIMS. (to appear ).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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