English

Mori Dream Spaces as fine moduli of quiver representations

Algebraic Geometry 2013-02-26 v3 Representation Theory

Abstract

We construct Mori Dream Spaces as fine moduli spaces of representations of bound quivers, thereby extending results of Craw--Smith \cite{CrawSmith} beyond the toric case. Any collection of effective line bundles L=(OX,L1,...,Lr)\mathscr{L}=(\mathscr{O}_X, L_1,..., L_r) on a Mori Dream Space XX defines a bound quiver of sections and a map from XX to a toric quiver variety L|\mathscr{L}| called the multigraded linear series. We provide necessary and sufficient conditions for this map to be a closed immersion and, under additional assumptions on L\mathscr{L}, the image realises XX as the fine moduli space of ϑ\vartheta-stable representations of the bound quiver. As an application, we show how to reconstruct del Pezzo surfaces from a full, strongly exceptional collection of line bundles.

Keywords

Cite

@article{arxiv.1104.2490,
  title  = {Mori Dream Spaces as fine moduli of quiver representations},
  author = {Alastair Craw and Dorothy Winn},
  journal= {arXiv preprint arXiv:1104.2490},
  year   = {2013}
}

Comments

25 pages, 2 figures; v2 section 3 simplified, typos corrected; v3 final version