Research Article

Berezin number inequalities for 2 × 2 operator matrices and applications

Published in: Quaestiones Mathematicae
Volume 49 , issue 4 , 2026 , pages: 451–472

DOI: 10.2989/16073606.2025.2592769

Author(s): Messaoud Guesba El Oued University, Algeria , Fuad Kittaneh The University of Jordan, Jordan

Keywords: 47A08 , 47A12 , 47A30 , 47B15 , Berezin number , operator matrix , reproducing kernel , inequality

Abstract

In this paper, we present new bounds for the Berezin numbers of 2 × 2 operator matrices, which improve and generalize the existing bounds. Some other related results are also presented.

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Research Article

Berezin number inequalities for 2 × 2 operator matrices and applications

Abstract

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