English

Unit balls of Polyhedral Banach spaces with many extreme points

Functional Analysis 2023-03-20 v1

Abstract

Let EE be a (IV)(\mathrm{IV})-polyhedral Banach space. We show that, for each ϵ>0\epsilon>0, EE admits an ϵ\epsilon-equivalent (V)\mathrm{(V)}-polyhedral norm such that the corresponding closed unit ball is the closed convex hull of its extreme points. In particular, we obtain that every separable isomorphically polyhedral Banach space, for each ϵ>0\epsilon>0, admits an ϵ\epsilon-equivalent (V)(\mathrm{V})-polyhedral norm such that the corresponding closed unit ball is the closed convex hull of its extreme points.

Keywords

Cite

@article{arxiv.2303.10023,
  title  = {Unit balls of Polyhedral Banach spaces with many extreme points},
  author = {Carlo Alberto De Bernardi},
  journal= {arXiv preprint arXiv:2303.10023},
  year   = {2023}
}