A geometric invariant theory construction of moduli spaces of stable maps
Algebraic Geometry
2008-10-18 v3
Abstract
We construct the moduli spaces of stable maps, \bar M_g,n(P^r,d), via geometric invariant theory (GIT). This construction is only valid over Spec C, but a special case is a GIT presentation of the moduli space of stable curves of genus g with n marked points, \bar M_g,n; this is valid over Spec Z. Our method follows that used in the case n=0 by Gieseker to construct \bar M_g, though our proof that the semistable set is nonempty is entirely different.
Keywords
Cite
@article{arxiv.0706.1381,
title = {A geometric invariant theory construction of moduli spaces of stable maps},
author = {Elizabeth Baldwin and David Swinarski},
journal= {arXiv preprint arXiv:0706.1381},
year = {2008}
}
Comments
75 pages LaTeX; the GIT construction of moduli spaces of stable n-pointed curves is now given over the integers