On Norm-Continuity and Compactness of Spectrum.
Dorte Olesen (1974)
Mathematica Scandinavica
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Displaying similar documents to “On proper boundary points of the spectrum and complemented eigenspaces.”
On Norm-Continuity and Compactness of Spectrum.
Density of the self-adjoint elements with finite spectrum in an irrational rotation C*-algebra.
Man-Duen Choi, George A. Elliot (1990)
Mathematica Scandinavica
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On the spectrum of the analytic generator.
A. van Daele (1975)
Mathematica Scandinavica
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On the spectrum of a one-parameter strongly continous representation.
David E. Evans (1976)
Mathematica Scandinavica
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The spectrum and commutant of a certain weighted translation operator.
Karl Petersen (1975)
Mathematica Scandinavica
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On the spectrum of Robin Laplacian in a planar waveguide
Alex Ferreira Rossini (2019)
Czechoslovak Mathematical Journal
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We consider the Laplace operator in a planar waveguide, i.e. an infinite two-dimensional straight strip of constant width, with Robin boundary conditions. We study the essential spectrum of the corresponding Laplacian when the boundary coupling function has a limit at infinity. Furthermore, we derive sufficient conditions for the existence of discrete spectrum.
Qualitative properties of the peripheral spectrum
Jaroslav Zemánek (2007)
Banach Center Publications
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A simple proof of the Stone-Weierstrass theorem for CCR-algebras with Hausdorff spectrum.
Sin-Ei Takahasi (1976)
Mathematica Scandinavica
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On the Fine Structure of Spectra.
C.J.A., Jr. Halberg, A. Samuelsson (1971)
Mathematica Scandinavica
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Remarks on a C*-dynamical system.
Yoshikazu Katayama (1981)
Mathematica Scandinavica
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On the Gaussian Markoff spectrum.
Henry W. Hansen (1978)
Mathematica Scandinavica
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The joint approximate spectrum of a finite system of elements of a C*-algebra
GH. Mocanu (1974)
Studia Mathematica
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Locality and Covariance of the Spectrum
H. J. Borchers (1986)
Recherche Coopérative sur Programme n°25
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Correction to "Method od orthogonal projections and approximation of the spectrum of a bounded operator" Studia Math. 65 (1979), 21-29
Andrzej Pokrzywa (1985)
Studia Mathematica
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Discreteness of the Spectrum of a Second Order Elliptic Differential Operator in L2 (rn).
Erik Balslev (1968)
Mathematica Scandinavica
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