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Techniques in Equivariant Ehrhart Theory
Department of Mathematics, Freie Universität Berlin, Arnimallee 2, 14195, Berlin, Berlin, Germany, Arnimallee 2, Berlin.
Department of Mathematics, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul-si, 08826, South Korea, Gwanak-ro, Gwanak-gu.
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics of Data and AI.ORCID iD: 0000-0002-4816-590x
2024 (English)In: Annals of Combinatorics, ISSN 0218-0006, E-ISSN 0219-3094, Vol. 28, no 3, p. 819-870Article in journal (Refereed) Published
Abstract [en]

Equivariant Ehrhart theory generalizes the study of lattice point enumeration to also account for the symmetries of a polytope under a linear group action. We present a catalogue of techniques with applications in this field, including zonotopal decompositions, symmetric triangulations, combinatorial interpretation of the h∗ -polynomial, and certificates for the (non)existence of invariant nondegenerate hypersurfaces. We apply these methods to several families of examples including hypersimplices, orbit polytopes, and graphic zonotopes, expanding the library of polytopes for which their equivariant Ehrhart theory is known.

Place, publisher, year, edition, pages
Springer Nature , 2024. Vol. 28, no 3, p. 819-870
Keywords [en]
Ehrhart theory, Polyhedra, Triangulations, Zonotopes
National Category
Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-350255DOI: 10.1007/s00026-023-00673-zISI: 001105176400001Scopus ID: 2-s2.0-85177471126OAI: oai:DiVA.org:kth-350255DiVA, id: diva2:1883435
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QC 20240710

Available from: 2024-07-10 Created: 2024-07-10 Last updated: 2025-02-11Bibliographically approved

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Supina, Mariel

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