On the numerical range of an operator

DOI10.3792/pja/1195520010zbMath0227.47002OpenAlexW1972741513MaRDI QIDQ5634483

Takayuki Furuta, Ritsuo Nakamoto

Publication date: 1971

Published in: Proceedings of the Japan Academy, Series A, Mathematical Sciences (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.3792/pja/1195520010

Mathematics Subject Classification ID

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

Related Items

The generalized spectral matrices and radial matrices on symmetry classes of tensors, Rota's theorem and Heinz inequalities, On certain finite dimensional numerical ranges and numerical radii^†, Norm Inequalities Equivalent to Heinz Inequality, A remark on the concept of channels, III. An algebraic theory of extended Toeplitz operators, On some examples of non-normal operators, IV, On normal approximate spectrum, III, Certain convexoid operators, On the generalized radial matrices and a conjecture of Marcus and Sandy, c-convex matrices: characterizations, inclusion relations and normality, Numerical ranges and dilations^∗, The generalized spectral radius, numerical radius and spectral norm

Cites Work

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• On some theorems of Berberian and Sheth