On the Ball Covering Property of $\mathbb{L}(\mathbb{X}, \mathbb{Y})$
Abstract
We investigate the Ball Covering Property (BCP) of Banach spaces through the lens of Birkhoff-James orthogonality, yielding a new geometric characterization of the property. Applying this framework, we characterize the BCP of the bounded linear operator space under specific conditions on and , proving that an earlier necessary condition is sufficient. As an application, we provide a complete affirmative answer to an open question concerning the BCP of . We also establish the stability of the BCP under -norm direct sums. In finite dimensions, we provide a sufficient condition for an -dimensional Banach space to have a minimal covering by balls. Furthermore, we find an upper bound for the minimal ball covering number of in the finite-dimensional setting and prove that this number is exactly when is an -dimensional strictly convex space and is an -dimensional smooth space.
Keywords
Cite
@article{arxiv.2607.10353,
title = {On the Ball Covering Property of $\mathbb{L}(\mathbb{X}, \mathbb{Y})$},
author = {Ankan Mishra and Kallol Paul and Debmalya Sain and Shamim Sohel},
journal= {arXiv preprint arXiv:2607.10353},
year = {2026}
}