Results 71 to 80 of about 413 (185)

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
doaj   +1 more source

On Calder�n-Toeplitz operators

Monatshefte f�r Mathematik, 1993
Let \(\psi\in L^ 2(\mathbb{R}^ d)\) be an admissible wavelet, \(\psi_ \xi(x)= t^{-d/2} \psi\Bigl({x-v\over t}\Bigr)\), \(\xi= (v,t)\), \(G\) the ``\(ax+ b\)''-group, i.e. \(G=\{\xi= (v,t): v\in \mathbb{R}^ d, t>0\}\), \(d\xi= t^{d-1}dv dt\) the left invariant measure on \(G\).
openaire   +1 more source

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
doaj   +1 more source

Factorization of Hankel operators, range inclusion of Toeplitz and Hankel operators on the vector-valued Hardy space

Comptes Rendus. Mathématique
Using Douglas theorem on factorization and range inclusion of bounded linear operators, we give the factorization of Hankel operators, range inclusion of Hankel and Toeplitz operators defined on vector-valued Hardy spaces.
Bhuia, Sudip Ranjan
doaj   +1 more source

Toeplitz Operators on the Weighted Bergman Space over the Two-Dimensional Unit Ball

Journal of Function Spaces, 2015
We extend the known results on commutative Banach algebras generated by Toeplitz operators with radial quasi-homogeneous symbols on the two-dimensional unit ball.
Alma García, Nikolai Vasilevski
doaj   +1 more source

A rank formula for the self-commutators of rational Toeplitz tuples

Journal of Inequalities and Applications, 2016
In this paper we derive a rank formula for the self-commutators of tuples of Toeplitz operators with matrix-valued rational symbols.
In Sung Hwang, An Hyun Kim, Sumin Kim
doaj   +1 more source

Weighted Estimates for Toeplitz Operators Related to Pseudodifferential Operators

Journal of Function Spaces, 2016
The authors establish the weighted Lp estimates for a class of pseudodifferential operators for both cases ...
Yan Lin, Zongguang Liu, Chengdan Xu, Zichu Ren   +3 more
doaj   +1 more source

Hyponormal Toeplitz Operators on the Dirichlet Spaces

Abstract and Applied Analysis, 2013
We completely characterize the hyponormality of bounded Toeplitz operators with Sobolev symbols on the Dirichlet space and the harmonic Dirichlet space.
Puyu Cui, Yufeng Lu
doaj   +1 more source

An Improved Toeplitz Approximation Method for Coherent DOA Estimation in Impulsive Noise Environments. [PDF]

Entropy (Basel), 2023
Dai J, Qiu T, Luan S, Tian Q, Zhang J.
europepmc   +1 more source

COMPACT TOEPLITZ OPERATORS

Honam Mathematical Journal, 2013
In this paper we prove that if Toeplitz operators with symbols in RW satisfy as then is compact and also prove that if is compact then the Berezin transform of equals to zero on .
openaire   +2 more sources