Smooth contractible threefolds with hyperbolic $\mathbb{G}_{m}$-actions via ps-divisors
Algebraic Geometry
2017-02-14 v1
Abstract
The aim of this note is to give an alternative proof of a theorem of Koras and Russell, that is, a characterization of smooth contractible affine varieties endowed with a hyperbolic action of the group , using the language of polyhedral divisors developed by Altmann and Hausen as generalization of -divisors.
Cite
@article{arxiv.1702.03739,
title = {Smooth contractible threefolds with hyperbolic $\mathbb{G}_{m}$-actions via ps-divisors},
author = {Charlie Petitjean},
journal= {arXiv preprint arXiv:1702.03739},
year = {2017}
}