arXiv · 1801.08953
We show that the totally nonnegative part of a partial flag variety (in the sense of Lusztig) is homeomorphic to a closed ball.
Pavel Galashin, Steven N. Karp, Thomas Lam. 2018-01-26. The totally nonnegative part of G/P is a ball. https://doi.org/10.1016/j.aim.2019.05.009
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