3-by-3 matrices with elliptical numerical range revisited

DOI10.13001/1081-3810.1646zbMath1283.15072OpenAlexW813061983MaRDI QIDQ5746794

Patrick X. Rault, Tsvetanka Sendova, Ilya M. Spitkovskij

Publication date: 10 February 2014

Published in: The Electronic Journal of Linear Algebra (Search for Journal in Brave)

Full work available at URL: http://www.math.technion.ac.il/iic/ela/ela-articles/articles/vol26_pp158-167.pdf

zbMATH Keywords

eigenvaluecompanion matricesunitarily irreducible matrixelliptical numerical range

Mathematics Subject Classification ID

Eigenvalues, singular values, and eigenvectors (15A18) Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60)

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