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Upper bounds for edge-antipodal and subequilateral polytopes

Swanepoel, Konrad (2007) Upper bounds for edge-antipodal and subequilateral polytopes. Periodica Mathematica Hungarica, 54 (1). pp. 99-106. ISSN 0031-5303

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Identification Number: 10.1007/s-10998-007-1099-0

Abstract

A polytope in a finite-dimensional normed space is subequilateral if the length in the norm of each of its edges equals its diameter. Subequilateral polytopes occur in the study of two unrelated subjects: surface energy minimizing cones and edge-antipodal polytopes. We show that the number of vertices of a subequilateral polytope in any d-dimensional normed space is bounded above by (d / 2 + 1) d for any d ≥ 2. The same upper bound then follows for the number of vertices of the edge-antipodal polytopes introduced by I. Talata [19]. This is a constructive improvement to the result of A. Pór (to appear) that for each dimension d there exists an upper bound f(d) for the number of vertices of an edge-antipodal d-polytopes. We also show that in d-dimensional Euclidean space the only subequilateral polytopes are equilateral simplices.

Item Type: Article
Official URL: http://www.springer.com/math/journal/10998
Additional Information: © 2009 Springer
Subjects: Q Science > QA Mathematics
Sets: Departments > Mathematics
Date Deposited: 09 Oct 2009 09:41
Last Modified: 01 Oct 2010 09:27
URI: http://eprints.lse.ac.uk/id/eprint/25412

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