paper

Quasimaps to moduli spaces of sheaves

arXiv:2111.11417 · doi:10.1017/fmp.2025.3

Abstract

We develop a theory of quasimaps to a moduli space of sheaves on a surface . Under some assumptions, we prove that moduli spaces of quasimaps are proper and carry a perfect obstruction theory. Moreover, they are naturally isomorphic to moduli spaces of sheaves on threefolds , where is a nodal curve. Using Zhou's theory of entangled tails, we establish a wall-crossing formula which therefore relates the Gromov-Witten theory of and the Donaldson-Thomas theory of with relative insertions. We evaluate the wall-crossing formula for Hilbert schemes of points , if is a del Pezzo surface.

73 pages, major revision following the referee's suggestions, published version

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