English

On the nontrivial projection problem

Functional Analysis 2010-09-14 v1

Abstract

The Nontrivial Projection Problem asks whether every finite-dimensional normed space of dimension greater than one admits a well-bounded projection of non-trivial rank and corank or, equivalently, whether every centrally symmetric convex body (of arbitrary dimension greater than one) is approximately affinely equivalent to a direct product of two bodies of non-trivial dimension. We show that this is true "up to a logarithmic factor."

Keywords

Cite

@article{arxiv.0805.3792,
  title  = {On the nontrivial projection problem},
  author = {Stanislaw J. Szarek and Nicole Tomczak-Jaegermann},
  journal= {arXiv preprint arXiv:0805.3792},
  year   = {2010}
}

Comments

17 pages

R2 v1 2026-06-21T10:43:51.997Z