On operators with the same spectrum
Gh. Constantin (1975)
Matematički Vesnik
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Displaying similar documents to “On the generalized Kato spectrum”
On operators with the same spectrum
Qualitative properties of the peripheral spectrum
Jaroslav Zemánek (2007)
Banach Center Publications
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The fine spectra of some Cesàro generalized operators defined on ().
Bucur, Amelia (1996)
General Mathematics
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On one subset M. Schechter's essential spectrum
V. Rakočević (1981)
Matematički Vesnik
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Quasihyponormal operators and the continuity of the approximate point spectrum.
Djordjević, Slaviša V. (1997)
Matematichki Vesnik
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Locality and Covariance of the Spectrum
H. J. Borchers (1986)
Recherche Coopérative sur Programme n°25
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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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On a quantitative refinement of the Lagrange spectrum
Edward B. Burger, Amanda Folsom, Alexander Pekker, Rungporn Roengpitya, Julia Snyder (2002)
Acta Arithmetica
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Different spectra for nonlinear operators.
Catană, Petronela (2005)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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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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Diagonals of Self-adjoint Operators with Finite Spectrum
Marcin Bownik, John Jasper (2015)
Bulletin of the Polish Academy of Sciences. Mathematics
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Given a finite set X⊆ ℝ we characterize the diagonals of self-adjoint operators with spectrum X. Our result extends the Schur-Horn theorem from a finite-dimensional setting to an infinite-dimensional Hilbert space analogous to Kadison's theorem for orthogonal projections (2002) and the second author's result for operators with three-point spectrum (2013).
Taylor Spectrum and Characteristic Functions of Commuting 2-Contractions
Bendoukha, Berrabah (2008)
Serdica Mathematical Journal
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2000 Mathematics Subject Classification: 47A10, 47A13. In this paper, we give a description of Taylor spectrum of commuting 2-contractions in terms of characteritic functions of such contractions. The case of a single contraction obtained by B. Sz. Nagy and C. Foias is generalied in this work.
On the axiomatic theory of spectrum
V. Kordula, V. Müller (1996)
Studia Mathematica
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There are a number of spectra studied in the literature which do not fit into the axiomatic theory of Żelazko. This paper is an attempt to give an axiomatic theory for these spectra, which, apart from the usual types of spectra, like one-sided, approximate point or essential spectra, include also the local spectra, the Browder spectrum and various versions of the Apostol spectrum (studied under various names, e.g. regular, semiregular or essentially semiregular).