Numerical range of the Foguel–Halmos operator

DOI10.4064/sm201020-30-7OpenAlexW3216178715MaRDI QIDQ5066722

Kuo-Zhong Wang, Hwa-Long Gau, Pei Yuan Wu

Publication date: 30 March 2022

Published in: Studia Mathematica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.4064/sm201020-30-7

zbMATH Keywords

numerical rangenumerical radiusFoguel operatorFoguel-Halmos operator

Mathematics Subject Classification ID

Numerical range, numerical radius (47A12) Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.) (47B37)

Related Items (1)

Extremality of bounds for numerical radii of Foguel operators

Cites Work

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• Numerical ranges of weighted shifts
• The numerical range of a nonnegative matrix
• Numerical ranges of Foguel operators
• Inner derivations and norm equality
• The norm and modulus of a Foguel operator
• A polynomially bounded operator on Hilbert space which is not similar to a contraction
• Model theory and linear extreme points in the numerical radius unit ball
• On Foguel's Answer to Nagy's Question
• A Counterexample to a Problem of SZ.-Nagy

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