The totally nonnegative part of G/P is a ball
Representation Theory
2021-06-10 v3 Algebraic Geometry
Combinatorics
Abstract
We show that the totally nonnegative part of a partial flag variety (in the sense of Lusztig) is homeomorphic to a closed ball.
Cite
@article{arxiv.1801.08953,
title = {The totally nonnegative part of G/P is a ball},
author = {Pavel Galashin and Steven N. Karp and Thomas Lam},
journal= {arXiv preprint arXiv:1801.08953},
year = {2021}
}
Comments
6 pages. v2: Proof of Lemma 1 moved to arXiv:1707.02010. v3: Minor changes