Flat portions on the boundary of the indefinite numerical range of \(3\times 3\) matrices

DOI10.1016/j.laa.2008.01.017zbMath1144.15016OpenAlexW2070083211MaRDI QIDQ924360

Elsie Sterbin Gottlieb

Publication date: 15 May 2008

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

Full work available at URL: https://doi.org/10.1016/j.laa.2008.01.017

zbMATH Keywords

indefinite inner productflat portionindefinite numerical rangeplane algebraic curve

Mathematics Subject Classification ID

Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60) Spaces with indefinite inner product (Kre?n spaces, Pontryagin spaces, etc.) (46C20) Quadratic and bilinear forms, inner products (15A63)

Related Items

Computing the numerical range of Krein space operators, Singular points of the algebraic curves of symmetric hyperbolic forms

Cites Work

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• Über den Wertevorrat einer Matrix