English

Moduli of quiver representations for exceptional collections on surfaces

Algebraic Geometry 2019-05-29 v2

Abstract

Suppose SS is a smooth projective surface over an algebraically closed field kk, L={L1,,Ln}\mathcal{L}=\{L_1,\ldots,L_n\} is a full strong exceptional collection of line bundles on SS. Let QQ be the quiver associated to this collection. One might hope that SS is the moduli space of representations of QQ with dimension vector (1,,1)(1,\ldots,1) for a suitably chosen stability condition θ\theta: SMθS\cong M_\theta. In this paper, we show that this is the case for del Pezzo surfaces. Furthermore, we show the blow-up at a point can be recovered from an augmentation of exceptional collections (in the sense of L. Hille and M.Perling) via morphism between moduli of quiver representations.

Keywords

Cite

@article{arxiv.1803.06533,
  title  = {Moduli of quiver representations for exceptional collections on surfaces},
  author = {Xuqiang Qin and Shizhuo Zhang},
  journal= {arXiv preprint arXiv:1803.06533},
  year   = {2019}
}

Comments

34 pages. New version deals only with exceptional collections on del Pezzo surfaces with cleaner presentation. For general cases, please see the old version