#### Vol. 294, No. 1, 2018

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Moduli spaces of stable pairs

### Yinbang Lin

Vol. 294 (2018), No. 1, 123–158
##### Abstract

We construct a moduli space of stable pairs over a smooth projective variety, parametrizing morphisms from a fixed coherent sheaf to a varying sheaf of fixed topological type, subject to a stability condition. This generalizes the notion used by Pandharipande and Thomas, following Le Potier, where the fixed sheaf is the structure sheaf of the variety. We then describe the relevant deformation and obstruction theories. We also show the existence of the virtual fundamental class in special cases.

##### Keywords
moduli space, stable pair, deformation, obstruction, virtual fundamental class
##### Mathematical Subject Classification 2010
Primary: 14D20
Secondary: 14J60, 14N35