Bollob\'as-type theorems for range strongly exposing operators
Abstract
We study Bollob\'as-type theorems for range strongly exposing operators. When such a theorem holds for operators from a Banach space into another Banach space , we say that the pair satisfies the Bishop-Phelps-Bollob\'as property for range strongly exposing operators (BPBp-RSE, for short). We provide new characterisations of uniform convexity and complex uniform convexity via the BPBp-RSE, including for pairs involving spaces such as and . In particular, we show that satisfies the BPBp-RSE if and only if is uniformly convex, and that or satisfy the BPBp-RSE if and only if is -uniformly convex. We also highlight differences between the real and complex cases, showing that there exist pairs for which the BPBp-RSE holds in the complex setting but fails for their respective underlying real spaces. Additionally, we consider various subspaces of operators, such as compact and finite-rank, and extend several results from the literature to this new setting. The paper concludes with a collection of open problems.
Cite
@article{arxiv.2512.10442,
title = {Bollob\'as-type theorems for range strongly exposing operators},
author = {Helena Del Río},
journal= {arXiv preprint arXiv:2512.10442},
year = {2025}
}