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The Ratios between the Spectral Norm, the Numerical Radius and the Spectral Radius

Authors: Kui Du


Recently, Uhlig [Numer. Algorithms, 52(3):335-353, 2009] proposed open questions about the ratios between the spectral norm, the numerical radius and the spectral radius of a square matrix. In this note, we provide some observations to answer these questions.

Keywords: Spectral norm, Numerical radius, Spectral radius, Ratios

Digital Object Identifier (DOI):

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