Results 41 to 50 of about 463,715 (164)

Normal Toeplitz Operators on the Bergman Space

Mathematics, 2020
In this paper, we give a characterization of normality of Toeplitz operator Tφ on the Bergman space A2(D). First, we state basic properties for Toeplitz operator Tφ on A2(D). Next, we consider the normal Toeplitz operator Tφ on A2(D) in terms of harmonic
Sumin Kim, Jongrak Lee
doaj   +1 more source

Analysis of Eigenvalue Clustering Leads to Optimal Scaling in Numerical Radiative Transfer

Numerical Linear Algebra with Applications, Volume 33, Issue 5, October 2026.
ABSTRACT We consider a multidimensional polychromatic radiative transfer (RT) problem, accounting for scattering processes in a general form, that is, anisotropic (dipole) scattering with partial frequency redistribution. Given a discrete ordinates (SN$$ {S}_N $$) discretization, we report the corresponding matrix structures, depending on the model and
Pietro Benedusi, Simone Riva, Luca Belluzzi, Stefano Serra‐Capizzano   +3 more
wiley   +1 more source

Dual Toeplitz Operators on the Orthogonal Complement of the Generalized Fock Space

Mathematics
We characterize the boundedness and compactness of dual Toeplitz operators on the orthogonal complement of the generalized Fock space. We study the problem when the finite sum of the dual Toeplitz products is compact.
Baoli Xie, Jianxiang Dong, Caochuan Ma
doaj   +1 more source

On the product of Toeplitz and composition operators on Fock-Sobolev spaces

四川大学学报. 自然科学版, 2021
We characterize the boundedness of the product of Toeplitz and composition operators for two polynomials symbols on Fock-Sobolev spaces. We also consider the commutativity of Toeplitz and composition operator, and obtain several necessary and sufficient ...
QIN Jie, WANG Xiao-Feng
doaj  

Two Localization Strategies for Sequential MCMC Data Assimilation With Applications to Nonlinear Non‐Gaussian Geophysical Models

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 10, October 2026.
Abstract We present a localized data assimilation (DA) scheme based on sequential Markov Chain Monte Carlo (SMCMC) (Ruzayqat et al., 2024, https://doi.org/10.1002/qj.4710), a provably convergent method for filtering high‐dimensional, nonlinear, and potentially non‐Gaussian state‐space models (SSMs).
Hamza Ruzayqat, Hristo G. Chipilski, Omar Knio   +2 more
wiley   +1 more source

On the Dilation of Truncated Toeplitz Operators

, 2017
An operator is called the dilation of a truncated Toeplitz operator if for two symbols and an inner function u, holds for where denotes the orthogonal projection of onto the model space and In this paper, we study properties of the dilation of truncated ...
고응일
core   +1 more source

Forecasting With Dynamic Factor Models Estimated by Partial Least Squares

Journal of Forecasting, Volume 45, Issue 6, Page 2785-2806, September 2026.
ABSTRACT Dynamic factor models (DFMs) have found great success in nowcasting and short‐term macroeconomic forecasting when incorporating large sets of predictive information. The factor loadings are typically estimated cross‐sectionally with principal component analysis (PCA) or maximum likelihood (ML), which ignore whether the factors have predictive ...
Samuel Rauhala
wiley   +1 more source

Asymmetric truncated Toeplitz operators equal to the zero operator [PDF]

, 2016
Asymmetric truncated Toeplitz operators are compressions of multiplication operators acting between two model spaces. These operators are natural generalizations of truncated Toeplitz operators.
Jurasik, Joanna, Łanucha, Bartosz
core   +2 more sources

Fast Magnetic Field Computation in Cylindrical Structures With Arbitrary and Nonhomogeneous Cross Sections Using a Pseudo‐Spectral Curvilinear Coordinate Method: Application to the Computation of MFL Field From Defect Surface

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 39, Issue 5, September/October 2026.
ABSTRACT This paper introduces a fast numerical method for computing magnetostatic fields in cylindrical structures with arbitrary and nonhomogeneous cross‐sections. The efficiency of the approach results from the combination of curvilinear coordinate systems, specifically adapted to each interface, with a pseudo‐spectral Fourier method used to enforce
D. Prémel
wiley   +1 more source

Introduction to Fredholm, Toeplitz and Hankel Operator [PDF]

, 2019
The whole discussion of the thesis is about Fredholm; Toeplitz; and Hankel operator. Atkinson0s theorem gives an equivalent de_nition of Fredholm operator, there we get a relation between Compact and Fredholm operator. We will learn the Calkin algebra on
D, Sukumar, Roy, Subhajit
core