A geometric invariant theory construction of moduli spaces of stable maps

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.

75 pages LaTeX; the GIT construction of moduli spaces of stable n-pointed curves is now given over the integers

References in corpus (2)

• Log minimal model program for the moduli space of stable curves of genus three
• A GIT Construction of Moduli Spaces of Stable Maps in Positive Characteristic

Cited by in corpus (2)

• GIT Constructions of Moduli Spaces of Stable Curves and Maps
• GIT stability of weighted pointed curves