Fredholmness and Weylness of block operator matrices
Functional Analysis
2025-08-27 v2
Abstract
This paper has aim to characterize Fredholmness and Weylness of upper triangular operator matrices having arbitrary dimension n. We present various characterization results in the setting of infinite dimensional Hilbert spaces, thus extending some known results from Cao X. et al. (2006, 2005) and Zhang et al. (2012) to the case of arbitrary dimension n. We pose our results without using separability assumption, thus improving perturbation results from Wu X. et al. (2020).
Cite
@article{arxiv.2108.12425,
title = {Fredholmness and Weylness of block operator matrices},
author = {Nikola Sarajlija},
journal= {arXiv preprint arXiv:2108.12425},
year = {2025}
}
Comments
arXiv admin note: text overlap with arXiv:2108.12153