Numerical range and positive block matrices
Functional Analysis
2020-04-17 v1
Abstract
We obtain several norm and eigenvalue inequalities for positive matrices partitioned into four blocks. The results involve the numerical range of the off-diagonal block X, especially the distance from 0 to W(X).
Keywords
Cite
@article{arxiv.2004.07533,
title = {Numerical range and positive block matrices},
author = {Jean Christophe Bourin and Eun-Young Lee},
journal= {arXiv preprint arXiv:2004.07533},
year = {2020}
}