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Doctoral thesis
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English

Quot schemes and moduli spaces

ContributorsJuhasz, Mate
Defense date2016-06-06
Abstract

Consider the moduli space M of stable vector bundles over a curve. Verlinde's formulas give the cohomologies of line bundles over M. We develop a novel method to recalculate this. Consider two birationally equivalent spaces, a Quot scheme Q and a projective fibration P, with a PGL(n) action. By lifting the PGL(n) action on P to a line bundle L, the GIT quotient is a fibration over M with an induced line bundle L'. By the [Q,R]=0 theorem, the cohomologies of L' correspond to the invariant part of the cohomologies of L. The Atiyah-Bott localization formula gives the equivariant Euler characteristic of L. The main idea is to apply this formula to Q instead of P. The main conjecture is that we get the same results as using P. We calculate the formula for certain parameters and verify the conjecture for those cases.

eng
Keywords
  • Quot scheme
  • Moduli space
  • Stable vector bundle
  • Verlinde's formula
  • Geometric invariant theory
  • Atiyah-Bott localization
Citation (ISO format)
JUHASZ, Mate. Quot schemes and moduli spaces. 2016. doi: 10.13097/archive-ouverte/unige:85000
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