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math.CO2026

Generalized snake posets, order polytopes, and lattice-point enumeration

Eon Lee, Andrés R. Vindas-Meléndez, Zhi Wang

Building from the work of von Bell et al.~(2022), we study the Ehrhart theory of order polytopes arising from a special class of distributive lattices, known as generalized snake p…

math.CO2025

Stack-sorting simplices: geometry and lattice-point enumeration

Eon Lee, Carson Mitchell, Andrés R. Vindas-Meléndez

We initiate the study of subpolytopes of the permutahedron that arise as the convex hulls of stack-sorting on permutations. We primarily focus on permutations, i.e., permutat…