English

Ideal norms and trigonometric orthonormal systems

Functional Analysis 2016-09-06 v1

Abstract

In this article, we characterize the UMDUMD--property of a Banach space XX by ideal norms associated with trigonometric orthonormal systems. The asymptotic behavior of that numerical parameters can be used to decide whether or not XX is a UMDUMD--space. Moreover, in the negative case, we obtain a measure that shows how far XX is from being a UMDUMD--space. The main result is, that all described parameters are equivalent also in the quantitative setting.

Keywords

Cite

@article{arxiv.math/9404208,
  title  = {Ideal norms and trigonometric orthonormal systems},
  author = {Joerg Wenzel},
  journal= {arXiv preprint arXiv:math/9404208},
  year   = {2016}
}
R2 v1 2026-07-22T17:54:46.968Z