On the numerical radius of an upper triangular operator matrix

DOI10.5556/j.tkjm.55.2024.5094MaRDI QIDQ6558040

Mohammed Benharrat, Mehdi Naimi

Publication date: 18 June 2024

Published in: Tamkang Journal of Mathematics (Search for Journal in Brave)

zbMATH Keywords

numerical rangeessential numerical rangenumerical radiusupper triangular operator matrix

Mathematics Subject Classification ID

Linear operator inequalities (47A63) Numerical range, numerical radius (47A12) Operators on Hilbert spaces (general) (47B02)

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