Results 1 to 10 of about 519,001 (206)
Fredholm Weighted Composition Operators on Dirichlet Space [PDF]
International Journal of Mathematics and Mathematical Sciences, 2012 This paper characterizes bounded Fredholm, bounded invertible, and unitary weighted composition operators on Dirichlet space.
Liankuo Zhao
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Approximation by Semi-Fredholm Operators [PDF]
Proceedings of the American Mathematical Society, 1994 We present a simple approach for calculating some known distances from a bounded operator defined on a separable Hilbert space to certain sets related to semi-Fredholm operators.
Fernando Galaz-Fontes
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Essential spectra in non-Archimedean fields
Математичні Студії, 2022 In the paper we extend some aspects of the essential spectra theory of linear operators acting in non-Archimedean (or p-adic) Banach spaces. In particular, we establish sufficient conditions for the relations between the essential spectra of the sum of ...
A. Ammar, F. Z. Boutaf, A. Jeribi
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Block Toeplitz operators with frequency-modulated semi-almost periodic symbols
International Journal of Mathematics and Mathematical Sciences, 2003 This paper is concerned with the influence of frequency modulation on the semi-Fredholm properties of Toeplitz operators with oscillating matrix symbols.
A. Böttcher, S. Grudsky, I. Spitkovsky
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Application of symmetric analytic functions to spectra of linear operators
Karpatsʹkì Matematičnì Publìkacìï, 2021 The paper is devoted to extension of the theory of symmetric analytic functions on Banach sequence spaces to the spaces of nuclear and $p$-nuclear operators on the Hilbert space.
I. Burtnyak +4 more
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ON A CLASS OF GENERALIZED FREDHOLM OPERATORS, V
Demonstratio Mathematica, 1997 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Multiplication operators on the space of functions of bounded variation
Demonstratio Mathematica, 2017 In this paper,we study the properties of the multiplication operator acting on the bounded variation space BV[0, 1]. In particular,we show the existence of non-null compact multiplication operators on BV[0, 1] and non-invertible Fredholm multiplication ...
Astudillo-Villalba Franklin R. +1 more
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On the closed range problem for composition operators on the Dirichlet space
Concrete Operators, 2019 We characterize closed range composition operators on the Dirichlet space for a particular class of composition symbols. The characterization relies on a result about Fredholm Toeplitz operators with BMO1 symbols, and with Berezin transforms of vanishing
Zorboska Nina
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Fredholm Toeplitz operators [PDF]
Proceedings of the American Mathematical Society, 1970 Whether a Toeplitz operator on H 2 {H^2}
Douglas, R. G., Sarason, D.
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Invertible and normal composition operators on the Hilbert Hardy space of a half–plane
Concrete Operators, 2016 Operators on function spaces of form Cɸf = f ∘ ɸ, where ɸ is a fixed map are called composition operators with symbol ɸ. We study such operators acting on the Hilbert Hardy space over the right half-plane and characterize the situations when they are ...
Matache Valentin
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