Proof of a conjecture on numerical ranges of weighted cyclic matrices

DOI10.1016/j.laa.2023.11.017zbMath1530.15017MaRDI QIDQ6185988

Hwa-Long Gau

Publication date: 9 January 2024

Published in: Linear Algebra and its Applications (Search for Journal in Brave)

zbMATH Keywords

numerical rangenumerical radiusweighted cyclic matrix

Mathematics Subject Classification ID

Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60) Numerical range, numerical radius (47A12)

Cites Work

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• Maximizing numerical radii of weighted shifts under weight permutations
• Weighted shift matrices: unitary equivalence, reducibility and numerical ranges
• Numerical Ranges of Hilbert Space Operators
• Numerical ranges of cyclic shift matrices