Results 91 to 100 of about 2,570 (220)
Compact Operators on the Bergman Spaces with Variable Exponents on the Unit Disc of C
International Journal of Mathematics and Mathematical Sciences, 2018 We study the compactness of some classes of bounded operators on the Bergman space with variable exponent. We show that via extrapolation, some results on boundedness of the Toeplitz operators with general L1 symbols and compactness of bounded operators ...
Dieudonne Agbor
doaj +1 more source
Coil Sketching for Fast and Efficient 4D Lung MRI Reconstruction
Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2241-2253, April 2026.ABSTRACT Purpose To develop and evaluate a memory‐efficient and accelerated reconstruction framework for respiratory‐resolved 4D lung MRI using coil sketching and Toeplitz approximation, enabling high‐quality motion‐compensated low‐rank (MoCo‐LR) reconstructions on clinically accessible GPU hardware.
Joseph W. Plummer +7 more
wiley +1 more source
Reducing Subspaces of the Dual Truncated Toeplitz Operator
Journal of Function Spaces, 2018 We define the dual truncated Toeplitz operators and give some basic properties of them. In particular, spectrum and reducing subspaces of some special dual truncated Toeplitz operator are characterized.
Yinyin Hu +4 more
doaj +1 more source
Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2207-2213, April 2026.ABSTRACT Purpose Previous studies suggested that arterial‐input‐function (AIF) images are necessary to avoid signal saturation for pulmonary transit time (PTT) measurements. This study challenges that notion by investigating whether PTT can be accurately measured using blood pool signals from myocardial enhancement (non‐AIF) images during resting first‐
Mingyue Zhao +8 more
wiley +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
Large Multi‐Response Linear Regression Estimation Based on Low‐Rank Pre‐Smoothing
Statistical Analysis and Data Mining: An ASA Data Science Journal, Volume 19, Issue 2, April 2026.ABSTRACT Pre‐smoothing is a technique aimed at increasing the signal‐to‐noise ratio in data to improve subsequent estimation and model selection in regression problems. However, pre‐smoothing has thus far been limited to the univariate response regression setting.
Xinle Tian +3 more
wiley +1 more source
Toeplitz operators and hyponormality [PDF]
, 1999 We consider Toeplitz operators on three spaces of analytic functions: the Hardy space, the Bergman space, and the space H 2(μ) for a special choice of measure μ. An operator A is hyponormal if its self-commutator A* A − AA* is positive.
Lewis, Kathryn Marie
core
Unitary equivalence to truncated Toeplitz operators [PDF]
, 2012 In this paper we investigate operators unitarily equivalent to truncated Toeplitz operators. We show that this class contains certain sums of tensor products of truncated Toeplitz operators.
ZARRABI, Mohamed +2 more
core +4 more sources
Unitary equivalence to truncated Toeplitz operators [PDF]
, 2010 In this paper we investigate operators unitarily equivalent to truncated Toeplitz operators. We show that this class contains certain sums of tensor products of truncated Toeplitz operators.
Zarrabi, Mohamed +2 more
core +4 more sources
Toeplitz operators and quantum mechanics [PDF]
, 1986 Toeplitz operators on the Segal-Bargmann spaces of Gaussian measure square-integrable entire functions on complex n-space Cn are studied. The C∗-algebra generated by the Weyl form of the canonical commutation relations consists precisely of the uniform ...
Berger, C.A, Coburn, L.A
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