Results 21 to 30 of about 218,978 (281)
On the quadratic Fock functor [PDF]
, 2012 We prove that the quadratic second quantization of an operator p on $L^2(\mathbb{R}^d)\cap L^\infty (\mathbb{R}^d)$ is an orthogonal projection on the quadratic Fock space if and only if p =MI, where MI is a multiplication operator by a characteristic ...
Dhahri, Ameur
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Extrapolation of operator-valued multiplication operators [PDF]
Quaestiones Mathematicae, 2021 We discuss $\mathrm{L}^p$ fiber spaces which appear, e.g., as extrapolation spaces of unbounded multiplication operators which in turn are motivated, for instance, by non-autonomous evolution equations.
Budde, Christian, Heymann, Retha
openaire +2 more sources
On dB spaces with nondensely defined multiplication operator and the existence of zero-free functions [PDF]
, 2014 In this work we consider de Branges spaces where the multiplication operator by the independent variable is not densely defined. First, we study the canonical selfadjoint extensions of the multiplication operator as a family of rank-one perturbations ...
Silva, Luis O., Toloza, Julio H.
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On Some Properties of Cowen-Douglas Class of Operators
Journal of Function Spaces, 2018 We will consider multiplication operators on a Hilbert space of analytic functions on a domain Ω⊂C. For a bounded analytic function φ on Ω, we will give necessary and sufficient conditions under which the complement of the essential spectrum of Mφ in φΩ ...
Parastoo Heiatian Naeini +1 more
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Multiplication Operator with BMO Symbols and Berezin Transform
Journal of Function Spaces, 2015 We discuss multiplication operator with a special symbol on the weighted Bergman space of the unit ball. We give the necessary and sufficient conditions for the compactness of multiplication operator on the weighted Bergman space of the unit ball.
Xue Feng +4 more
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Composition and multiplication operators between Orlicz function spaces
Journal of Inequalities and Applications, 2016 Composition operators and multiplication operators between two Orlicz function spaces are investigated. First, necessary and sufficient conditions for their continuity are presented in several forms.
Tadeusz Chawziuk +4 more
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Integral representation of vertical operators on the Bergman space over the upper half-plane
Comptes Rendus. Mathématique, 2023 Let $\Pi $ denote the upper half-plane. In this article, we prove that every vertical operator on the Bergman space $\mathcal{A}^2(\Pi )$ over the upper half-plane can be uniquely represented as an integral operator of the form \begin{equation*} \left ...
Bais, Shubham R. +2 more
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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 (P*-N) quasi normal operators Of order "n" In Hilbert space
Al-Mustansiriyah Journal of Science, 2021 Through this paper, we submitted some types of quasi normal operator is called be (k*-N)- quasi normal operator of order n defined on a Hilbert space H, this concept is generalized of some kinds of quasi normal operator appear recently form most ...
Salim Dawood M., Jaafer Hmood Eidi
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Spectrum of One-Dimensional Potential Perturbed by a Small Convolution Operator: General Structure
Mathematics, 2023 We consider an operator of multiplication by a complex-valued potential in L2(R), to which we add a convolution operator multiplied by a small parameter. The convolution kernel is supposed to be an element of L1(R), while the potential is a Fourier image
D. I. Borisov +2 more
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