English

Weighted numerical radius inequalities for operator and operator matrices

Functional Analysis 2023-02-24 v1

Abstract

The concepts of weighted numerical radius has been defined in recent times. In this article, we obtain several upper bound for weighted numerical radius of operators and 2×22 \times 2 operator matrices which generalize and improves some well known famous inequality for classical numerical radius. We also obtain an upper bound for the weighted numerical radius of the Aluthge transformation, T~\tilde{T} of an operator TB(H),T \in \mathcal{B}(\mathcal{H}), where T~=T1/2UT1/2\tilde{T} = |T|^{1/2} U |T|^{1/2} and T=UTT = U |T| be the canonical polar decomposition of T.T.

Keywords

Cite

@article{arxiv.2302.11798,
  title  = {Weighted numerical radius inequalities for operator and operator matrices},
  author = {Raj Kumar Nayak},
  journal= {arXiv preprint arXiv:2302.11798},
  year   = {2023}
}
R2 v1 2026-06-28T08:47:34.465Z