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Pré-Publication, Document De Travail Année : 2021

Binary scalar products

Andrey Kupavskii
Stefan Weltge
  • Fonction : Auteur

Résumé

Let $A,B \subseteq \mathbb{R}^d $ both span $\mathbb{R}^d$ such that $\langle a, b \rangle \in \{0,1\}$ holds for all $a \in A$, $b \in B$. We show that $ |A| \cdot |B| \le (d+1) 2^d $. This allows us to settle a conjecture by Bohn, Faenza, Fiorini, Fisikopoulos, Macchia, and Pashkovich (2015) concerning 2-level polytopes. Such polytopes have the property that for every facet-defining hyperplane $H$ there is a parallel hyperplane $H'$ such that $H \cup H'$ contain all vertices. The authors conjectured that for every $d$-dimensional 2-level polytope $P$ the product of the number of vertices of $P$ and the number of facets of $P$ is at most $d 2^{d+1}$, which we show to be true.

Dates et versions

hal-03236563 , version 1 (26-05-2021)

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Andrey Kupavskii, Stefan Weltge. Binary scalar products. 2021. ⟨hal-03236563⟩
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