An overview of horospherical varieties and coloured fans
arXiv:2305.13558
Abstract
We provide an overview of the combinatorial theory of horospherical varieties using coloured fans, a generalization of the combinatorial theory of toric varieties using polyhedral fans.
46 pages. Current V3 changed some content and fixed some errors, particularly in Sections 1.2, 6.3 (new), 6.4, and 7.2