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arxiv: 2411.16654 · v1 · pith:S72AHT2Enew · submitted 2024-11-25 · 🧮 math.CO

Newton polytopes of dual Schubert polynomials

classification 🧮 math.CO
keywords dualpolynomialsschubertm-convexitynewtonpolytopesalternativearos
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The M-convexity of dual Schubert polynomials was first proven by Huh, Matherne, M\'esz\'aros, and St. Dizier in 2022. We give a full characterization of the supports of dual Schubert polynomials, which yields an elementary alternative proof of the M-convexity result, and furthermore strengthens it by explicitly characterizing the vertices of their Newton polytopes combinatorially.

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