English

Blow ups of $\mathbb{P^n}$ as quiver moduli for exceptional collections

Algebraic Geometry 2018-05-11 v2

Abstract

Suppose PmnP^n_m is the blow up of Pn\mathbb{P}^n at a linear subspace of dimension mm, L={L1,,Lr}\mathcal{L}=\{L_1,\ldots,L_r\} is a (not necessarily full) strong exceptional collection of line bundles on PmnP^n_m. Let QQ be the quiver associated to this collection. One might wonder when is PmnP^n_m 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 achieve such isomorphism using L\mathcal{L} of length 33. As a result, PmnP^n_m is the moduli space of representations of a very simple quiver. Moreover, we realize the blow up as morphism of moduli spaces for the same quiver.

Keywords

Cite

@article{arxiv.1804.09544,
  title  = {Blow ups of $\mathbb{P^n}$ as quiver moduli for exceptional collections},
  author = {Xuqiang Qin},
  journal= {arXiv preprint arXiv:1804.09544},
  year   = {2018}
}

Comments

13 pages, comments welcome. Minor change in introduction. arXiv admin note: text overlap with arXiv:1803.06533