Results 61 to 70 of about 211 (142)

Unbounded generalisations of Schur and operator multipliers [PDF]

, 2013
Bounded Schur multipliers were introduced and characterised several decades ago, and various applications of this algebra of functions have been discovered. More recently, research into different classes of unbounded multipliers has been carried out.
Steen, Naomi Mary
core  

On the minimum modulus of dual truncated Toeplitz operators

This article provides a systematic investigation of the minimum modulus of dual truncated Toeplitz operators (DTTOs) $D_φ$ acting on the orthogonal complement of the model space $\mathcal{K}_u^{\perp}$, where $u$ is a nonconstant inner function and $φ\in L^\infty(\T)$.
Bhuia, Sudip Ranjan, Golla, Ramesh, Nag, Puspendu   +2 more
openaire   +2 more sources

Noncommutative Interpolation And Poisson Transforms [PDF]

, 1997
. General results of interpolation (eg. Nevanlinna-Pick) by elements in the noncommutative analytic Toeplitz algebra F 1 (resp. noncommutative disc algebra An ) with consequences to the interpolation by bounded operator-valued analytic functions in ...
Alvaro Arias, Gelu Popescu
core  

Dual Toeplitz operators on the weighted Fock spaces

四川大学学报. 自然科学版
With the successful characterization of the semi-commutativity of dual Toeplitz operators on the orthogonal complement of the Bergman space over the unit disk， dual Toeplitz operators on the orthogonal complement of analytic function spaces have ...
CAO Guangfu, YU Siqi
doaj  

Optimization of highly uncertain feedback in H [infinity] [PDF]

, 1998
This dissertation presents a new mathematical framework to optimize performance of multi-input multi-output feedback systems subject to large dynamical uncertainty.
Djouadi, Mohamed Seddik.
core  

Characterizations of the product of asymmetric dual truncated Toeplitz operators

AIMS Mathematics
The asymmetric dual truncated Toeplitz operator (ADTTO) is a compression multiplication operator acting on the orthogonal complement of two different model spaces. In this paper, we present an operator equation characterization of an ADTTO using the compressed shift operator.
Zhenhui Zhu, Qi Wu, Yong Chen
openaire   +2 more sources

Bounded Analytic Functions On The Unit Disc [PDF]

, 2010
In this thesis, we have dealt primarily with two function algebras. The first one is the space of all holomorphic functions on the unit disc D in the complex plane which are continuous up to the boundary, denoted by A(D).
Rupam, Rishika
core  

Block dual Toeplitz operators on the orthogonal complement of the Dirichlet space

Annals of Functional Analysis
The authors furnish a characterization of the compactness of the finite sum of block dual Toeplitz product and the Brown-Halmos type theorem about block dual Toeplitz operators.
Chunxu Xu, Jianxiang Dong, Tao Yu
openaire   +1 more source

Assessment and optimisation of 3D optical topography for brain imaging [PDF]

, 2010
Optical topography has recently evolved into a widespread research tool for non-invasively mapping blood flow and oxygenation changes in the adult and infant cortex.
Matias Correia, T.M.
core  

Post-beamforming filtering for enhanced contrast resolution in medical ultrasound. [PDF]

, 2010
University of Minnesota Ph.D. dissertation. October 2010. Major: Electrical Engineering. Advisor: Dr. Emad S. Ebbini. 1 computer file (PDF); xv, 156 pages, appendices A-B. Ill.
Wan, Yayun
core