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Sharp estimates for the numerical radii of $$2\times 2$$ operator matrices

Published Online: 2026-02-25

Published Print: 2026-04

Authors

Guesba, Messaoud

Kittaneh, Fuad
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Text and Data Mining valid from 2026-02-25

Version of Record valid from 2026-02-25
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Article History

Received: 12 January 2026

Accepted: 26 January 2026

First Online: 25 February 2026

Declarations

:

: The authors have no relevant financial or non-financial interests to disclose.

: The authors declare no competing interests.

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