On the boundary of theC-numerical range of a matrix

DOI10.1080/03081089508818395zbMath0830.15025OpenAlexW2015149415MaRDI QIDQ4854473

Yasutaka Nishikawa, Makoto Takaguchi, Hiroshi Nakazato

Publication date: 5 February 1996

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

Full work available at URL: https://doi.org/10.1080/03081089508818395

zbMATH Keywords

boundarycomplex matrices\(C\)-numerical rangedegrees of smoothnessnon-analytically smooth points

Mathematics Subject Classification ID

Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60) Numerical range, numerical radius (47A12)

Related Items (7)

The q-numerical range and the Davis-Wielandt shell of reducible 3 × 3 matrices ⋮ On Generalized Numerical Ranges of Operators on an Indefinite Inner Product Space ⋮ The \(q\)-numerical range of a reducible matrix via a normal operator ⋮ Signatures of quantum phase transitions from the boundary of the numerical range ⋮ Some Results on the q-Numerical ⋮ Davis-Wielandt shell and \(q\)-numerical range ⋮ The boundary of theq-numerical range of a reducible matrix

Cites Work

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• Computer generated numerical ranges and some resulting theorems
• Nondifferentiabie points of ∂W_c(A)
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• On the boundary of theC-numerical range of a normal matrix
• A theorem on numerical range
• c-convex matrices: characterizations, inclusion relations and normality
• C-numerical ranges andC-numerical radii
• Über den Wertevorrat einer Matrix

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