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  1. Home > Articles & Issues >
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  3. Ehrhart Positivity f ...
Conference paper

Ehrhart Positivity for Generalized Permutohedra

Federico Castillo (1), Fu Liu (1)
(1) University of California [Davis]
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Imported on
November 21, 2016
Published on
December 31, 2014
Last modified on
March 31, 2025
Volume
DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015)
Proceedings
DOI
10.46298/dmtcs.2505
License
Attribution 4.0 International (CC BY 4.0)
National Science Foundation
1265702
Volumes, Ehrhart polynomials and valuations of polytopes
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677
Views
852
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Ehrhart Positivity for Generalized Permutohedra

Federico Castillo (1), Fu Liu (1)
(1) University of California [Davis]
Abstract
English
There are few general results about the coefficients of Ehrhart polynomials. We present a conjecture about their positivity for a certain family of polytopes known as generalized permutohedra. We have verified the conjecture for small dimensions combining perturbation methods with a new valuation on the algebra of rational pointed polyhedral cones constructed by Berline and Vergne.
French
Il existe peu de résultats sur les coefficients des polynômes d’Ehrhart. On présente une conjecture concernant leur positivité pour une certaine famille de polytopes connus sous le nom de permutoèdre généralisé. On a vérifié la conjecture pour les petites dimensions en combinant des méthodes de perturbation avec une nouvelle valuation sur l’algèbre des cônes polyédraux rationnels pointés, construite par Berline et Vergne.
Keywords
  • [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM]
  • Ehrhart polynomials
  • Generalized permutohedra
  • Perturbations
  • Valuations
Cited by

Source: OpenCitations

  • On the Relationship Between Ehrhart Unimodality and Ehrhart Positivity

    Annals of Combinatorics

    Authors : Fu Liu ORCID, Liam Solus ORCID

    Journal reference : Volume 23, 2019, pp. 347-365

    DOI : 10.1007/s00026-019-00429-8
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