Numerical radius equalities and inequalities for Hilbert space operators

Abdelkader Frakis; Fuad Kittaneh

Surveys in Mathematics and its Applications (Dec 2024)

Numerical radius equalities and inequalities for Hilbert space operators

Abdelkader Frakis,
Fuad Kittaneh

Affiliations

Abdelkader Frakis: Department of Mathematics, Mustapha Stambouli University, Mascara, Algeria.
Fuad Kittaneh: Department of Mathematics, The University of Jordan, Amman, Jordan. and Department of Mathematics, Korea University, Seoul 02841, South Korea.

Journal volume & issue: Vol. 19 (2024)
pp. 317 – 330

Abstract

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We give new numerical radius equalities and inequalities for Hilbert space operators. Also, we provide some upper bounds for the numerical radii of certain 2 × 2 operator matrices.

Published in Surveys in Mathematics and its Applications

ISSN: 1843-7265 (Print); 1842-6298 (Online)
Publisher: University Constantin Brancusi of Targu-Jiu
Country of publisher: Romania
LCC subjects: Science: Mathematics
Website: http://www.utgjiu.ro/math/sma/

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