A note on estimate of the spectral radius of symmetric matrices
Zdeněk Dostál (1980)
Commentationes Mathematicae Universitatis Carolinae
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Zdeněk Dostál (1980)
Commentationes Mathematicae Universitatis Carolinae
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Hermann König (1979)
Studia Mathematica
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Vlastimil Pták (1982)
Banach Center Publications
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Henry P. McKean (1986)
Revista Matemática Iberoamericana
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This is the first of three papers on the geometry of KDV. It presents what purports to be a foliation of an extensive function space into which all known invariant manifolds of KDV fit naturally as special leaves. The two main themes are addition (each leaf has its private one) and unimodal spectral classes (each leaf has a spectral interpretation).
Rajendra Bhatia, Tirthankar Вhattacharyya (1995)
Studia Mathematica
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For a commuting n-tuple of matrices we introduce the notion of a joint spectral radius with respect to the p-norm and prove a spectral radius formula.
Bo Zhou (2001)
Mathematica Slovaca
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P. A. Cojuhari, A. M. Gomilko (2008)
Studia Mathematica
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The paper is concerned with conditions guaranteeing that a bounded operator in a reflexive Banach space is a scalar type spectral operator. The cases where the spectrum of the operator lies on the real axis and on the unit circle are studied separately.
Rudi Brits (2011)
Studia Mathematica
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We extend an example of B. Aupetit, which illustrates spectral discontinuity for operators on an infinite-dimensional separable Hilbert space, to a general spectral discontinuity result in abstract Banach algebras. This can then be used to show that given any Banach algebra, Y, one may adjoin to Y a non-commutative inessential ideal, I, so that in the resulting algebra, A, the following holds: To each x ∈ Y whose spectrum separates the plane there corresponds a perturbation of x, of...