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math.CO2025
Interpreting the Ehrhart coefficients of cross-polytopes
Krishna Menon, Emil Verkama
It is known that the Ehrhart polynomials of cross-polytopes, as well as of pyramids over them, have positive coefficients. We give a combinatorial proof of this fact by showing tha…
math.CO2025
Chow classes of matroids and standard Young tableaux
Jon Pål Hamre, Benjamin Schröter, Lorenzo Vecchi +1
We study the Chow classes of arbitrary matroids in the Grassmannian. We develop a new combinatorial approach for computing them, by first focusing on snake matroids and then extend…