English

Generalized numerical radius inequalities for certain operator matrices

Functional Analysis 2025-01-14 v1

Abstract

In this article, a series of new inequalities involving the qq-numerical radius for n×nn\times n tridiagonal, and anti-tridiagonal operator matrices has been established. These inequalities serve to establish both lower and upper bounds for the qq-numerical radius of operator matrices. Additionally, we developed qq-numerical radius inequalities for n×nn\times n circulant, skew circulant, imaginary circulant, imaginary skew circulant operator matrices. Important examples have been used to illustrate the developed inequalities. In this regard, analytical expressions and a numerical algorithm have also been employed to obtain the qq-numerical radii. We also provide a concluding section, which may lead to several new problems in this area.

Keywords

Cite

@article{arxiv.2501.06995,
  title  = {Generalized numerical radius inequalities for certain operator matrices},
  author = {Satyajit Sahoo and Narayan Behera},
  journal= {arXiv preprint arXiv:2501.06995},
  year   = {2025}
}

Comments

23 pages, 9 figures

R2 v1 2026-06-28T21:04:10.047Z