On some fibrations of $\overline{M}_{0,n}$
Algebraic Geometry
2011-05-18 v1
Abstract
The paper is a second step in the study of started in arXiv:1006.0987 [math.AG]. We study fiber type morphisms of this moduli space via Kapranov's beautiful description. Our final goal is to understand if any dominant morphism with positive dimensional fibers factors through forgetful morphisms. We prove that this is true if either or or the rational map induced on has linear general fibers. Along the way we give examples of forgetful morphisms whose fibers are connected curves of arbitrarily high positive genus, for .
Keywords
Cite
@article{arxiv.1105.3293,
title = {On some fibrations of $\overline{M}_{0,n}$},
author = {Andrea Bruno and Massimiliano Mella},
journal= {arXiv preprint arXiv:1105.3293},
year = {2011}
}
Comments
23 pages