Tropical cycles and Chow polytopes
Algebraic Geometry
2010-06-01 v3 Combinatorics
Abstract
The Chow polytope of an algebraic cycle in a torus depends only on its tropicalisation. Generalising this, we associate a Chow polytope to any abstract tropical variety in a tropicalised toric variety. Several significant polyhedra associated to tropical varieties are special cases of our Chow polytope. The Chow polytope of a tropical variety is given by a simple combinatorial construction: its normal subdivision is the Minkowski sum of and a reflected skeleton of the fan of the ambient toric variety.
Keywords
Cite
@article{arxiv.1001.4784,
title = {Tropical cycles and Chow polytopes},
author = {Alex Fink},
journal= {arXiv preprint arXiv:1001.4784},
year = {2010}
}
Comments
22 pp, 3 figs. Added discussion of arbitrary ambient toric varieties; several improvements suggested by Eric Katz; some rearrangement