The irreducibility of the moduli space of stable vector bundles of rank 2 on a quintic in $\pp^3$

Abstract

In this paper I consider a quintic surface in $\pp^3$, general in the sense of Noether-Lefschetz theory. The vector bundles of rank 2 on this surface which are $\mu$-stable with respect to the hyperplane section and have $c_1=K$, the canonical class of the surface and fixed $c_2$, are parametrized by a moduli space. This space is known to be irreducible for large $c_2$ (work of K.G. O'Grady). I give an explicit bound, namely $c_2\ge 16$.

arXiv commentAMSTeX, 12 pages

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