2 papers
math.CO2024
Postnikov--Stanley polynomials are Lorentzian
Serena An, Katherine Tung, Yuchong Zhang
Postnikov--Stanley polynomials are a generalization of skew dual Schubert polynomials to the setting of arbitrary Weyl groups. We prove that Postnikov--Stanley polynomials…
math.CO2024
Newton polytopes of dual Schubert polynomials
Serena An, Katherine Tung, Yuchong Zhang
The M-convexity of dual Schubert polynomials was first proven by Huh, Matherne, Mészáros, and St. Dizier in 2022. We give a full characterization of the supports of dual Schubert…