Characterizations of the support function of the numerical range of the product of positive contractions

DOI10.1080/03081087.2016.1138439zbMath1394.47003OpenAlexW2276890111MaRDI QIDQ3179163

Ning Zuo, Hong-Ke Du, Yue-Qing Wang

Publication date: 20 December 2016

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

Full work available at URL: https://doi.org/10.1080/03081087.2016.1138439

zbMATH Keywords

numerical rangespectrumpositive operatororthogonal projection

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Numerical range, numerical radius (47A12) General (adjoints, conjugates, products, inverses, domains, ranges, etc.) (47A05)

Cites Work

• The spectrum of the product of operators, and the product of their numerical ranges
• The numerical range and the spectrum of a product of two orthogonal projections
• Invertibility of linear combinations of two idempotents

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