On the characterization of \(2\times 2\) \(\rho\)-contraction matrices

DOI10.1016/S0024-3795(00)00265-2zbMath0989.15010OpenAlexW2091344655MaRDI QIDQ5932196

Ilya M. Spitkovskij, Kazuyoshi Okubo

Publication date: 6 May 2001

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

Full work available at URL: https://doi.org/10.1016/s0024-3795(00)00265-2

zbMATH Keywords

\(\rho\)-contraction\(\rho\)-numerical radiusdecomposable operators

Mathematics Subject Classification ID

Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60) Numerical range, numerical radius (47A12) Dilations, extensions, compressions of linear operators (47A20)

Related Items (1)

Operator matrices in class \(C_{\rho }\)

Cites Work

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• \(\rho\)-contraction and \(2\times 2\) matrix
• Convexity properties of operator radii associated with unitary \(p\)-dilations
• Inequalities involving the numerical radius

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