The totally nonnegative part of G/P is a ball
- Resource Type
- Working Paper
- Authors
- Galashin, Pavel; Karp, Steven N.; Lam, Thomas
- Source
- Adv. Math. 351 (2019), 614-620
- Subject
- Mathematics - Representation Theory
Mathematics - Algebraic Geometry
Mathematics - Combinatorics
14M15, 15B48, 20Gxx
- Language
We show that the totally nonnegative part of a partial flag variety (in the sense of Lusztig) is homeomorphic to a closed ball.
Comment: 6 pages. v2: Proof of Lemma 1 moved to arXiv:1707.02010. v3: Minor changes