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math.CO2019
The equivariant Ehrhart theory of the permutahedron
Federico Ardila, Mariel Supina, Andrés R. Vindas-Meléndez
Equivariant Ehrhart theory enumerates the lattice points in a polytope with respect to a group action. Answering a question of Stapledon, we describe the equivariant Ehrhart theory…
math.CO2019★ 4 cited
The Hopf Monoid of Orbit Polytopes
Mariel Supina
Many families of combinatorial objects have a Hopf monoid structure. Aguiar and Ardila introduced the Hopf monoid of generalized permutahedra and showed that it contains various ot…