English

Inequalities between s-numbers

Functional Analysis 2024-10-15 v2 Operator Algebras

Abstract

Singular numbers of operators between Hilbert spaces were generalized to Banach spaces by s-numbers (in the sense of Pietsch). This allows for different choices, including approximation, Gelfand, Kolmogorov and Bernstein numbers. Here, we present an elementary proof of a bound between the smallest and the largest s-number.

Keywords

Cite

@article{arxiv.2405.05509,
  title  = {Inequalities between s-numbers},
  author = {Mario Ullrich},
  journal= {arXiv preprint arXiv:2405.05509},
  year   = {2024}
}

Comments

6 pages

R2 v1 2026-06-28T16:21:36.785Z