Results 71 to 80 of about 2,570 (220)
Factorization of Toeplitz operators [PDF]
, 2023 In this article, by considering $T=(T_1,\dots, T_d)$, an $d$-tuple of commuting contractions on a Hilbert space $\mathcal{H}$, we study $T$-Toeplitz operators which consists of bounded operators $X$ on $\mathcal{H}$ such that \[ T_i^*XT_i=X \] for all $i=
Panja, Samir
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Complex FIOs and composition of Toeplitz operators [PDF]
, 2023 International audienceWe study Toeplitz operators on the Bargmann space, with Toeplitz symbols that are exponentials of complex quadratic forms, from the point of view of Fourier integral operators in the complex domain.
Johannes Sjöstrand +5 more
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Group Differences of Multiregion Glutamate Concentration in Clinical High Risk and Schizophrenia
European Journal of Neuroscience, Volume 64, Issue 1, July 2026.We investigated group effects of glutamate concentrations in 99 participants in four brain regions using proton magnetic resonance spectroscopy in clinical high risk, schizophrenia spectrum psychotic disorder individuals and healthy controls. Results showed no significant group differences, exploratory analyses showed significant positive symptom ...
Shue Kit Man +7 more
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Toeplitz operators on Hardy spaces [PDF]
, 2019 In the present thesis we establish Banach space counterparts for several results known for Toeplitz operators on Hardy-Hilbert spaces. We use methods of Didas, Eschmeier and Everard to construct Toeplitz projections for Toeplitz operators acting on a ...
Kraemer, Daniel
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Properties of two variables Toeplitz type operators
Annales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2016 The investigation of properties of generalized Toeplitz operators with respect to the pairs of doubly commuting contractions (the abstract analogue of classical two variable Toeplitz operators) is proceeded. We especially concentrate on the condition of
Elżbieta Król-Klimkowska, Marek Ptak
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Advanced Functional Materials, Volume 36, Issue 52, 29 June 2026.Thermally oxidized MoS2‐based radio‐frequency switches enable a multifunctional platform that unifies broadband RF switching and in‐memory computation. The device achieves a cutoff frequency of 33.2 THz with high energy efficiency and supports hardware‐aware signal processing.
Juho Son +5 more
wiley +1 more source
Toeplitz Operators in the Herglotz Space [PDF]
Integral Equations and Operator Theory, 2016 We define and study Toeplitz operators in the space of Herglotz solutions of the Helmholtz equation in $R^d$. As the most traditional definition of Toeplitz operators via Bergman-type projection is not available here, we use an approach based upon the reproducing kernel nature of the Herglotz space and sesquilinear forms, which results in a meaningful ...
Rozenblum, Grigori, Vasilevski, Nikolai
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Commuting Toeplitz Operators With Mixed Quasihomogeneous and Analytic Symbols
Journal of MathematicsA major open problem in the theory of Toeplitz operators on the analytic Bergman space over the unit disk is the characterization of the commutant of a given Toeplitz operator, that is, the set of all bounded Toeplitz operators that commute with it.
Aissa Bouhali +2 more
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Commutative C⁎-Algebras of Toeplitz Operators via the Moment Map on the Polydisk
Journal of Function Spaces, 2016 We found that in the polydisk Dn there exist (n+1)(n+2)/2 different classes of commutative C⁎-algebras generated by Toeplitz operators whose symbols are invariant under the action of maximal Abelian subgroups of biholomorphisms.
Mauricio Hernández-Marroquin +2 more
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High Voltage, Volume 11, Issue 3, Page 725-737, June 2026.ABSTRACT The stability analysis of Line Commutated Converter High Voltage Direct Current (LCC‐HVDC) is of considerable engineering importance. Establishing its analytical mathematical model helps to analyse stability and the factors that affect stability of the system.
Juanjuan Wang +6 more
wiley +1 more source