English

Toric Degenerations of GIT Quotients, Chow Quotients, and $\bar{M_{0,n}$

Algebraic Geometry 2007-05-23 v1

Abstract

We show that the moduli space of stable n-pointed rational curves can be flatly degenerated to a projective toric variety. We arrive at this by showing that the Chow quotients of the Grassmannians admit toric degenerations, which in turn, follows from a theorem that we prove for toric degenerations of more general Chow quotients. Along the way, we also argued that GIT quotient of a flat family is again flat. In particular, all GIT quotients of flag varieties by maximal tori can be flatly degenerated to projective toric varieties ([9] and [12]).

Keywords

Cite

@article{arxiv.math/0607824,
  title  = {Toric Degenerations of GIT Quotients, Chow Quotients, and $\bar{M_{0,n}$},
  author = {Yi Hu},
  journal= {arXiv preprint arXiv:math/0607824},
  year   = {2007}
}

Comments

8 pages