Steven N. Karp

activity

20152026

most citedSign variation, the Grassmannian, and total positivity

34 citations · 194 across the 17 of their papers we have counts for

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2 papers · 1 filter

math.RT2023

Universal Plücker coordinates for the Wronski map and positivity in real Schubert calculus

Steven N. Karp, Kevin Purbhoo

Given a $d$ -dimensional vector space $V \subset C [u]$ of polynomials, its Wronskian is the polynomial $(u + z_{1}) \dots (u + z_{n})$ whose zeros $- z_{i}$ are the points of $\m…

math.RT2018★ 16 cited

The totally nonnegative part of G/P is a ball

Pavel Galashin, Steven N. Karp, Thomas Lam

We show that the totally nonnegative part of a partial flag variety (in the sense of Lusztig) is homeomorphic to a closed ball.