On stretching the interval simplex-permutohedron
Combinatorics
2017-08-08 v7 Category Theory
Abstract
A family of polytopes introduced by E.M. Feichtner, A. Postnikov and B. Sturmfels, which were named nestohedra, consists in each dimension of an interval of polytopes starting with a simplex and ending with a permutohedron. This paper investigates a problem of changing and extending the boundaries of these intervals. An iterative application of Feichtner-Kozlov procedure of forming complexes of nested sets is a solution of this problem. By using a simple algebraic presentation of members of nested sets it is possible to avoid the problem of increasing the complexity of the structure of nested curly braces in elements of the produced simplicial complexes.
Cite
@article{arxiv.1106.3250,
title = {On stretching the interval simplex-permutohedron},
author = {Zoran Petric},
journal= {arXiv preprint arXiv:1106.3250},
year = {2017}
}
Comments
33 pages, corrected version with corrected picture at the end