Interpolation, Schur Functions and Moment Problems II

Interpolation, Schur Functions and Moment Problems II
Author: Daniel Alpay
Publisher: Springer Science & Business Media
Total Pages: 306
Release: 2012-07-25
Genre: Mathematics
ISBN: 3034804288

The origins of Schur analysis lie in a 1917 article by Issai Schur in which he constructed a numerical sequence to correspond to a holomorphic contractive function on the unit disk. These sequences are now known as Schur parameter sequences. Schur analysis has grown significantly since its beginnings in the early twentieth century and now encompasses a wide variety of problems related to several classes of holomorphic functions and their matricial generalizations. These problems include interpolation and moment problems as well as Schur parametrization of particular classes of contractive or nonnegative Hermitian block matrices. This book is primarily devoted to topics related to matrix versions of classical interpolation and moment problems. The major themes include Schur analysis of nonnegative Hermitian block Hankel matrices and the construction of Schur-type algorithms. This book also covers a number of recent developments in orthogonal rational matrix functions, matrix-valued Carathéodory functions and maximal weight solutions for particular matricial moment problems on the unit circle.​

Interpolation, Schur Functions and Moment Problems

Interpolation, Schur Functions and Moment Problems
Author: Daniel Alpay
Publisher: Birkhäuser
Total Pages: 304
Release: 2009-09-03
Genre: Mathematics
ISBN: 9783764391164

Schur analysis originated with an 1917 article which associated to a function, which is analytic and contractive in the open unit disk, a sequence, finite or infinite, of numbers in the open unit disk, called Schur coefficients, often named reflection coefficients in signal processing. This volume comprises seven essays dedicated to the analysis of Schur and Carathéodory functions and to the solutions of problems for these classes.

Interpolation, Schur Functions and Moment Problems

Interpolation, Schur Functions and Moment Problems
Author: Daniel Alpay
Publisher: Springer Science & Business Media
Total Pages: 310
Release: 2006-06-22
Genre: Mathematics
ISBN: 3764375477

Schur analysis originated with an 1917 article which associated to a function, which is analytic and contractive in the open unit disk, a sequence, finite or infinite, of numbers in the open unit disk, called Schur coefficients, often named reflection coefficients in signal processing. This volume comprises seven essays dedicated to the analysis of Schur and Carathéodory functions and to the solutions of problems for these classes.

Large Truncated Toeplitz Matrices, Toeplitz Operators, and Related Topics

Large Truncated Toeplitz Matrices, Toeplitz Operators, and Related Topics
Author: Dario A. Bini
Publisher: Birkhäuser
Total Pages: 757
Release: 2017-03-21
Genre: Mathematics
ISBN: 3319491822

This book presents a collection of expository and research papers on various topics in matrix and operator theory, contributed by several experts on the occasion of Albrecht Böttcher’s 60th birthday. Albrecht Böttcher himself has made substantial contributions to the subject in the past. The book also includes a biographical essay, a complete bibliography of Albrecht Böttcher’s work and brief informal notes on personal encounters with him. The book is of interest to graduate and advanced undergraduate students majoring in mathematics, researchers in matrix and operator theory as well as engineers and applied mathematicians.

Complex Function Theory, Operator Theory, Schur Analysis and Systems Theory

Complex Function Theory, Operator Theory, Schur Analysis and Systems Theory
Author: Daniel Alpay
Publisher: Springer Nature
Total Pages: 578
Release: 2020-09-19
Genre: Mathematics
ISBN: 3030448193

This book is dedicated to Victor Emmanuilovich Katsnelson on the occasion of his 75th birthday and celebrates his broad mathematical interests and contributions.Victor Emmanuilovich’s mathematical career has been based mainly at the Kharkov University and the Weizmann Institute. However, it also included a one-year guest professorship at Leipzig University in 1991, which led to him establishing close research contacts with the Schur analysis group in Leipzig, a collaboration that still continues today. Reflecting these three periods in Victor Emmanuilovich's career, present and former colleagues have contributed to this book with research inspired by him and presentations on their joint work. Contributions include papers in function theory (Favorov-Golinskii, Friedland-Goldman-Yomdin, Kheifets-Yuditskii) , Schur analysis, moment problems and related topics (Boiko-Dubovoy, Dyukarev, Fritzsche-Kirstein-Mädler), extension of linear operators and linear relations (Dijksma-Langer, Hassi-de Snoo, Hassi -Wietsma) and non-commutative analysis (Ball-Bolotnikov, Cho-Jorgensen).

Advances in Complex Analysis and Operator Theory

Advances in Complex Analysis and Operator Theory
Author: Fabrizio Colombo
Publisher: Birkhäuser
Total Pages: 398
Release: 2017-09-30
Genre: Mathematics
ISBN: 3319623621

This book gathers contributions written by Daniel Alpay’s friends and collaborators. Several of the papers were presented at the International Conference on Complex Analysis and Operator Theory held in honor of Professor Alpay’s 60th birthday at Chapman University in November 2016. The main topics covered are complex analysis, operator theory and other areas of mathematics close to Alpay’s primary research interests. The book is recommended for mathematicians from the graduate level on, working in various areas of mathematical analysis, operator theory, infinite dimensional analysis, linear systems, and stochastic processes.

Advancements in Complex Analysis

Advancements in Complex Analysis
Author: Daniel Breaz
Publisher: Springer Nature
Total Pages: 538
Release: 2020-05-12
Genre: Mathematics
ISBN: 3030401200

The contributions to this volume are devoted to a discussion of state-of-the-art research and treatment of problems of a wide spectrum of areas in complex analysis ranging from pure to applied and interdisciplinary mathematical research. Topics covered include: holomorphic approximation, hypercomplex analysis, special functions of complex variables, automorphic groups, zeros of the Riemann zeta function, Gaussian multiplicative chaos, non-constant frequency decompositions, minimal kernels, one-component inner functions, power moment problems, complex dynamics, biholomorphic cryptosystems, fermionic and bosonic operators. The book will appeal to graduate students and research mathematicians as well as to physicists, engineers, and scientists, whose work is related to the topics covered.

Indefinite Inner Product Spaces, Schur Analysis, and Differential Equations

Indefinite Inner Product Spaces, Schur Analysis, and Differential Equations
Author: Daniel Alpay
Publisher: Birkhäuser
Total Pages: 501
Release: 2018-01-30
Genre: Mathematics
ISBN: 3319688499

This volume, which is dedicated to Heinz Langer, includes biographical material and carefully selected papers. Heinz Langer has made fundamental contributions to operator theory. In particular, he has studied the domains of operator pencils and nonlinear eigenvalue problems, the theory of indefinite inner product spaces, operator theory in Pontryagin and Krein spaces, and applications to mathematical physics. His works include studies on and applications of Schur analysis in the indefinite setting, where the factorization theorems put forward by Krein and Langer for generalized Schur functions, and by Dijksma-Langer-Luger-Shondin, play a key role. The contributions in this volume reflect Heinz Langer’s chief research interests and will appeal to a broad readership whose work involves operator theory.

On Boundary Interpolation for Matrix Valued Schur Functions

On Boundary Interpolation for Matrix Valued Schur Functions
Author: Vladimir Bolotnikov
Publisher: American Mathematical Soc.
Total Pages: 122
Release: 2006
Genre: Mathematics
ISBN: 0821840479

A number of interpolation problems are considered in the Schur class of $p\times q$ matrix valued functions $S$ that are analytic and contractive in the open unit disk. The interpolation constraints are specified in terms of nontangential limits and angular derivatives at one or more (of a finite number of) boundary points. Necessary and sufficient conditions for existence of solutions to these problems and a description of all the solutions when these conditions are met is given.The analysis makes extensive use of a class of reproducing kernel Hilbert spaces ${\mathcal{H (S)$ that was introduced by de Branges and Rovnyak. The Stein equation that is associated with the interpolation problems under consideration is analyzed in detail. A lossless inverse scattering problem isalso considered.

An Advanced Complex Analysis Problem Book

An Advanced Complex Analysis Problem Book
Author: Daniel Alpay
Publisher: Birkhäuser
Total Pages: 523
Release: 2015-11-13
Genre: Mathematics
ISBN: 3319160591

This is an exercises book at the beginning graduate level, whose aim is to illustrate some of the connections between functional analysis and the theory of functions of one variable. A key role is played by the notions of positive definite kernel and of reproducing kernel Hilbert space. A number of facts from functional analysis and topological vector spaces are surveyed. Then, various Hilbert spaces of analytic functions are studied.