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Counts of maps to Grassmannians and intersections on the moduli space of bundles

Alina Marian·Dragos Oprea
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Abstract

We show that intersection numbers on the moduli space of stable bundles of coprime rank and degree over a smooth complex curve can be recovered as highest-degree asymptotics in formulas of Vafa-Intriligator type. In particular, we explicitly evaluate all intersection numbers appearing in the Verlinde formula. Our results are in agreement with previous computations of Witten, Jeffrey-Kirwan and Liu. Moreover, we prove the vanishing of certain intersections on a suitable Quot scheme which can be interpreted as giving equations between counts of maps to the Grassmannian.

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Alina Marian, Dragos Oprea. 2006-02-27. Counts of maps to Grassmannians and intersections on the moduli space of bundles. https://arxiv.org/abs/math/0602335

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