Maps of toric varieties in Cox coordinates
Algebraic Geometry
2014-06-02 v2
Abstract
The Cox ring provides a coordinate system on a toric variety analogous to the homogeneous coordinate ring of projective space. Rational maps between projective spaces are described using polynomials in the coordinate ring, and we generalise this to toric varieties, providing a unified description of arbitrary rational maps between toric arieties in terms of their Cox coordinates. Introducing formal roots of polynomials is necessary even in the simplest examples.
Cite
@article{arxiv.1004.4924,
title = {Maps of toric varieties in Cox coordinates},
author = {Gavin Brown and Jarosław Buczyński},
journal= {arXiv preprint arXiv:1004.4924},
year = {2014}
}
Comments
v2: 41 pages. final version, to appear in Fundamenta Mathematica