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Displaying similar documents to “Discrete spectrum and principal functions of non-selfadjoint differential operator”

On the joint spectral radius

Vladimír Müller (1997)

Annales Polonici Mathematici

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We prove the p -spectral radius formula for n-tuples of commuting Banach algebra elements

On the zero set of the Kobayashi-Royden pseudometric of the spectral unit ball

Nikolai Nikolov, Pascal J. Thomas (2008)

Annales Polonici Mathematici

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Given A∈ Ωₙ, the n²-dimensional spectral unit ball, we show that if B is an n×n complex matrix, then B is a “generalized” tangent vector at A to an entire curve in Ωₙ if and only if B is in the tangent cone C A to the isospectral variety at A. In the case of Ω₃, the zero set of the Kobayashi-Royden pseudometric is completely described.