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Large equilateral sets in subspaces of ℓ∞n of small codimension

Frankl, Nora (2021) Large equilateral sets in subspaces of ℓ∞n of small codimension. Discrete and Computational Geometry. ISSN 0179-5376

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Identification Number: 10.1007/s00454-020-00272-2


For fixed k we prove exponential lower bounds on the equilateral number of subspaces of ℓ∞n of codimension k. In particular, we show that subspaces of codimension 2 of ℓ∞n+2 and subspaces of codimension 3 of ℓ∞n+3 have an equilateral set of cardinality n+ 1 if n≥ 7 and n≥ 12 respectively. Moreover, the same is true for every normed space of dimension n, whose unit ball is a centrally symmetric polytope with at most 4 n/ 3 - o(n) pairs of facets.

Item Type: Article
Official URL:
Additional Information: © 2021 The Author, under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature
Divisions: Mathematics
Subjects: Q Science > QA Mathematics
Date Deposited: 15 Feb 2021 08:54
Last Modified: 20 Oct 2021 02:57

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