On a conjecture of Ridge

DOI10.1090/S0002-9939-97-04035-5zbMath0888.47001WikidataQ123302501 ScholiaQ123302501MaRDI QIDQ4372413

Tin-Yau Tam

Publication date: 11 December 1997

Published in: Proceedings of the American Mathematical Society (Search for Journal in Brave)

zbMATH Keywords

numerical rangeweighted shiftPerron rootnonnegative irreducible symmetric matrixshift of periodic weights

Mathematics Subject Classification ID

Subnormal operators, hyponormal operators, etc. (47B20) Numerical range, numerical radius (47A12)

Related Items

The \(q\)-numerical radius of weighted shift operators with periodic weights, Matrix powers with circular numerical range, Maximizing numerical radii of weighted shifts under weight permutations, Perturbation of the \(q\)-numerical radius of a weighted shift operator, In search of convexity: diagonals and numerical ranges, Numerical ranges of weighted shifts, Numerical ranges of normal weighted composition operators on \(\ell^2(\mathbb N)\)

Cites Work

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• Minimal range theorems for operators with thin spectra
• A spectral theory for direct integrals of operators
• Numerical Range of a Weighted Shift with Periodic Weights
• The numerical range of certain 0,1-matrices^†
• Mapping Theorems for the Numerical Range
• Approximate Point Spectrum of a Weighted Shift