Matrices with Hyperbolical Krein Space Numerical Range
Functional Analysis
2024-07-08 v2
Abstract
This paper is devoted to matrices with hyperbolical Krein space numerical range. This shape characterizes the 2-by-2 case and persists for certain classes of matrices, independently of their size. Ne\-cessary and sufficient conditions for low dimensional tridiagonal matrices to have this shape are obtained only involving the matrix entries
Keywords
Cite
@article{arxiv.2407.03164,
title = {Matrices with Hyperbolical Krein Space Numerical Range},
author = {N. Bebiano and R. Lemos and G. Soares},
journal= {arXiv preprint arXiv:2407.03164},
year = {2024}
}