Treatise On The Shift Operator

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Treatise on the Shift Operator

Author : N.K. Nikol'skii
Publisher : Springer Science & Business Media
ISBN 13 : 3642701515
Total Pages : 496 pages
Book Rating : 4.6/5 (427 download)

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Book Synopsis Treatise on the Shift Operator by : N.K. Nikol'skii

Download or read book Treatise on the Shift Operator written by N.K. Nikol'skii and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an elementary introduction to non-classical spectral theory. Mter the basic definitions and a reduction to the study of the functional model the discussion will be centered around the simplest variant of such a model which, formally speaking, comprises only the class of contraction operators with a one dimensional rank of non-unitarity (rank(I - T*T) = rank(I - TT*) = 1). The main emphasis is on the technical side of the subject, the book being mostly devoted to a development of the analytical machinery of spectral theory rather than to this discipline itself. The functional model of Sz. -Nagy and Foia§ re duces the study of general operators to an investigation of the . compression T=PSIK of the shift operator S, Sf = zf, onto coinvariant subspaces (i. e. subspaces in variant with respect to the adjoint shift S*). In the main body of the book (the "Lectures" in the proper meaning of the word) this operator acts on the Hardy space H2 and is itself a part of the operator of multiplication by the independent variable in the space L2 (in the case at hand L2 means L2(lf), If being the unit circle), this operator again being fundamental for classical spectral theory.

Invariant Subspaces of the Shift Operator

Author : Javad Mashreghi
Publisher : American Mathematical Soc.
ISBN 13 : 1470410451
Total Pages : 330 pages
Book Rating : 4.4/5 (74 download)

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Book Synopsis Invariant Subspaces of the Shift Operator by : Javad Mashreghi

Download or read book Invariant Subspaces of the Shift Operator written by Javad Mashreghi and published by American Mathematical Soc.. This book was released on 2015-04-23 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the CRM Workshop on Invariant Subspaces of the Shift Operator, held August 26-30, 2013, at the Centre de Recherches Mathématiques, Université de Montréal, Montréal, Quebec, Canada. The main theme of this volume is the invariant subspaces of the shift operator (or its adjoint) on certain function spaces, in particular, the Hardy space, Dirichlet space, and de Branges-Rovnyak spaces. These spaces, and the action of the shift operator on them, have turned out to be a precious tool in various questions in analysis such as function theory (Bieberbach conjecture, rigid functions, Schwarz-Pick inequalities), operator theory (invariant subspace problem, composition operator), and systems and control theory. Of particular interest is the Dirichlet space, which is one of the classical Hilbert spaces of holomorphic functions on the unit disk. From many points of view, the Dirichlet space is an interesting and challenging example of a function space. Though much is known about it, several important open problems remain, most notably the characterization of its zero sets and of its shift-invariant subspaces. This book is co-published with the Centre de Recherches Mathématiques.

Operators, Functions, and Systems - An Easy Reading

Author : Nikolai K. Nikolski
Publisher : American Mathematical Soc.
ISBN 13 : 0821852655
Total Pages : 458 pages
Book Rating : 4.8/5 (218 download)

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Book Synopsis Operators, Functions, and Systems - An Easy Reading by : Nikolai K. Nikolski

Download or read book Operators, Functions, and Systems - An Easy Reading written by Nikolai K. Nikolski and published by American Mathematical Soc.. This book was released on 2010-10-06 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Together with the companion volume by the same author, Operators, Functions, and Systems: An Easy Reading. Volume 1: Hardy, Hankel, and Toeplitz, Mathematical Surveys and Monographs, Vol. 92, AMS, 2002, this unique work combines four major topics of modern analysis and its applications: A. Hardy classes of holomorphic functions, B. Spectral theory of Hankel and Toeplitz operators, C. Function models for linear operators and free interpolations, and D. Infinite-dimensional system theory and signal processing. This volume contains Parts C and D. Function models for linear operators and free interpolations: This is a universal topic and, indeed, is the most influential operator theory technique in the post-spectral-theorem era. In this book, its capacity is tested by solving generalized Carleson-type interpolation problems. Infinite-dimensional system theory and signal processing: This topic is the touchstone of the three previously developed techniques. The presence of this applied topic in a pure mathematics environment reflects important changes in the mathematical landscape of the last 20 years, in that the role of the main consumer and customer of harmonic, complex, and operator analysis has more and more passed from differential equations, scattering theory, and probability to control theory and signal processing. This and the companion volume are geared toward a wide audience of readers, from graduate students to professional mathematicians. They develop an elementary approach to the subject while retaining an expert level that can be applied in advanced analysis and selected applications.

Operators, Functions, and Systems: Model operators and systems

Author : Nikolaĭ Kapitonovich Nikolʹskiĭ
Publisher : American Mathematical Soc.
ISBN 13 : 9780821828762
Total Pages : 460 pages
Book Rating : 4.8/5 (287 download)

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Book Synopsis Operators, Functions, and Systems: Model operators and systems by : Nikolaĭ Kapitonovich Nikolʹskiĭ

Download or read book Operators, Functions, and Systems: Model operators and systems written by Nikolaĭ Kapitonovich Nikolʹskiĭ and published by American Mathematical Soc.. This book was released on 2002 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Linear and Complex Analysis Problem Book 3

Author : Victor P. Havin
Publisher : Springer
ISBN 13 : 3540483675
Total Pages : 517 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Linear and Complex Analysis Problem Book 3 by : Victor P. Havin

Download or read book Linear and Complex Analysis Problem Book 3 written by Victor P. Havin and published by Springer. This book was released on 2006-12-08 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2-volume book is an updated, reorganized and considerably enlarged version of the previous edition of the Research Problem Book in Analysis (LNM 1043), a collection familiar to many analysts, that has sparked off much research. This new edition, created in a joint effort by a large team of analysts, is, like its predecessor, a collection of unsolved problems of modern analysis designed as informally written mini-articles, each containing not only a statement of a problem but also historical and methodological comments, motivation, conjectures and discussion of possible connections, of plausible approaches as well as a list of references. There are now 342 of these mini- articles, almost twice as many as in the previous edition, despite the fact that a good deal of them have been solved!

Recent Advances in Operator-Related Function Theory

Author : Alec L. Matheson
Publisher : American Mathematical Soc.
ISBN 13 : 082183925X
Total Pages : 230 pages
Book Rating : 4.8/5 (218 download)

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Book Synopsis Recent Advances in Operator-Related Function Theory by : Alec L. Matheson

Download or read book Recent Advances in Operator-Related Function Theory written by Alec L. Matheson and published by American Mathematical Soc.. This book was released on 2006 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The articles in this book are based on talks at a conference devoted to interrelations between function theory and the theory of operators. The main theme of the book is the role of Alexandrov-Clark measures. Two of the articles provide the introduction to the theory of Alexandrov-Clark measures and to its applications in the spectral theory of linear operators. The remaining articles deal with recent results in specific directions related to the theme of the book.

Linear Functional Equations. Operator Approach

Author : Anatolij Antonevich
Publisher : Birkhäuser
ISBN 13 : 3034889771
Total Pages : 188 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Linear Functional Equations. Operator Approach by : Anatolij Antonevich

Download or read book Linear Functional Equations. Operator Approach written by Anatolij Antonevich and published by Birkhäuser. This book was released on 2012-12-06 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book we shall study linear functional equations of the form m bu(x) == Lak(X)U(Qk(X)) = f(x), (1) k=l where U is an unknown function from a given space F(X) of functions on a set X, Qk: X -+ X are given mappings, ak and f are given functions. Our approach is based on the investigation of the operators given by the left-hand side of equa tion (1). In what follows such operators will be called functional operators. We will pay special attention to the spectral properties of functional operators, first of all, to invertibility and the Noether property. Since the set X, the space F(X), the mappings Qk and the coefficients ak are arbitrary, the class of operators of the form (1) is very rich and some of its individ ual representatives are related with problems arising in various areas of mathemat ics and its applications. In addition to the classical theory of functional equations, among such areas one can indicate the theory of functional-differential equations with deviating argument, the theory of nonlocal problems for partial differential equations, the theory of boundary value problems for the equation of a vibrating string and equations of mixed type, a number of problems of the general theory of operator algebras and the theory of dynamical systems, the spectral theory of au tomorphisms of Banach algebras, and other problems.

Factorization, Singular Operators and Related Problems

Author : Stefan Samko
Publisher : Springer Science & Business Media
ISBN 13 : 9401702276
Total Pages : 341 pages
Book Rating : 4.4/5 (17 download)

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Book Synopsis Factorization, Singular Operators and Related Problems by : Stefan Samko

Download or read book Factorization, Singular Operators and Related Problems written by Stefan Samko and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings comprise a large part of the papers presented at the In ternational Conference Factorization, Singular Operators and related problems, which was held from January 28 to February 1, 2002, at the University of th Madeira, Funchal, Portugal, to mark Professor Georgii Litvinchuk's 70 birth day. Experts in a variety of fields came to this conference to pay tribute to the great achievements of Professor Georgii Litvinchuk in the development of vari ous areas of operator theory. The main themes of the conference were focussed around the theory of singular type operators and factorization problems, but other topics such as potential theory and fractional calculus, to name but a couple, were also presented. The goal of the conference was to bring together mathematicians from var ious fields within operator theory and function theory in order to highlight recent advances in problems many of which were originally studied by Profes sor Litvinchuk and his scientific school. A second aim was to stimulate in ternational collaboration even further and promote the interaction of different approaches in current research in these areas. The Proceedings will be of great interest to researchers in Operator The ory, Real and Complex Analysis, Functional and Harmonic Analysis, Potential Theory, Fractional Calculus and other areas, as well as to graduate students looking for the latest results.

Unbounded Weighted Composition Operators in L2-Spaces

Author : Piotr Budzyński
Publisher : Springer
ISBN 13 : 3319740393
Total Pages : 182 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Unbounded Weighted Composition Operators in L2-Spaces by : Piotr Budzyński

Download or read book Unbounded Weighted Composition Operators in L2-Spaces written by Piotr Budzyński and published by Springer. This book was released on 2018-05-28 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book establishes the foundations of the theory of bounded and unbounded weighted composition operators in L2-spaces. It develops the theory in full generality, meaning that the corresponding composition operators are not assumed to be well defined. A variety of seminormality properties of unbounded weighted composition operators are characterized. The first-ever criteria for subnormality of unbounded weighted composition operators are provided and the subtle interplay between the classical moment problem, graph theory and the injectivity problem for weighted composition operators is revealed. The relationships between weighted composition operators and the corresponding multiplication and composition operators are investigated. The optimality of the obtained results is illustrated by a variety of examples, including those of discrete and continuous types. The book is primarily aimed at researchers in single or multivariable operator theory.

Operator Theory and Interpolation

Author : Hari Bercovic
Publisher : Birkhäuser
ISBN 13 : 3034884222
Total Pages : 311 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Operator Theory and Interpolation by : Hari Bercovic

Download or read book Operator Theory and Interpolation written by Hari Bercovic and published by Birkhäuser. This book was released on 2012-12-06 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of articles emphasizing modern interpolation theory, a topic which has seen much progress in recent years. These ideas and problems in operator theory, often arising from systems and control theories, bring the reader to the forefront of current research in this area.

Complex Analysis, Operators, and Related Topics

Author : Victor P. Havin
Publisher : Birkhäuser
ISBN 13 : 3034883781
Total Pages : 407 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Complex Analysis, Operators, and Related Topics by : Victor P. Havin

Download or read book Complex Analysis, Operators, and Related Topics written by Victor P. Havin and published by Birkhäuser. This book was released on 2012-12-06 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is devoted to some topical problems and various applications of operator theory and its interplay with modern complex analysis. 30 carefully selected surveys and research papers are united by the "operator theoretic ideology" and systematic use of modern function theoretical techniques.

Matrix Functions of Bounded Type: An Interplay Between Function Theory and Operator Theory

Author : Raúl E. Curto
Publisher : American Mathematical Soc.
ISBN 13 : 1470436248
Total Pages : 100 pages
Book Rating : 4.4/5 (74 download)

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Book Synopsis Matrix Functions of Bounded Type: An Interplay Between Function Theory and Operator Theory by : Raúl E. Curto

Download or read book Matrix Functions of Bounded Type: An Interplay Between Function Theory and Operator Theory written by Raúl E. Curto and published by American Mathematical Soc.. This book was released on 2019-09-05 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, the authors study matrix functions of bounded type from the viewpoint of describing an interplay between function theory and operator theory. They first establish a criterion on the coprime-ness of two singular inner functions and obtain several properties of the Douglas-Shapiro-Shields factorizations of matrix functions of bounded type. They propose a new notion of tensored-scalar singularity, and then answer questions on Hankel operators with matrix-valued bounded type symbols. They also examine an interpolation problem related to a certain functional equation on matrix functions of bounded type; this can be seen as an extension of the classical Hermite-Fejér Interpolation Problem for matrix rational functions. The authors then extend the H∞-functional calculus to an H∞¯¯¯¯¯¯¯¯¯+H∞-functional calculus for the compressions of the shift. Next, the authors consider the subnormality of Toeplitz operators with matrix-valued bounded type symbols and, in particular, the matrix-valued version of Halmos's Problem 5 and then establish a matrix-valued version of Abrahamse's Theorem. They also solve a subnormal Toeplitz completion problem of 2×2 partial block Toeplitz matrices. Further, they establish a characterization of hyponormal Toeplitz pairs with matrix-valued bounded type symbols and then derive rank formulae for the self-commutators of hyponormal Toeplitz pairs.

Operator Theory in Harmonic and Non-commutative Analysis

Author : Joseph A. Ball
Publisher : Springer
ISBN 13 : 3319062662
Total Pages : 260 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Operator Theory in Harmonic and Non-commutative Analysis by : Joseph A. Ball

Download or read book Operator Theory in Harmonic and Non-commutative Analysis written by Joseph A. Ball and published by Springer. This book was released on 2014-06-21 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the 23rd International Workshop on Operator Theory and its Applications (IWOTA 2012), which was held at the University of New South Wales (Sydney, Australia) from 16 July to 20 July 2012. It includes twelve articles presenting both surveys of current research in operator theory and original results.

Recent Advances in Operator Theory, Operator Algebras, and their Applications

Author : Dumitru Gaspar
Publisher : Springer Science & Business Media
ISBN 13 : 3764373148
Total Pages : 351 pages
Book Rating : 4.7/5 (643 download)

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Book Synopsis Recent Advances in Operator Theory, Operator Algebras, and their Applications by : Dumitru Gaspar

Download or read book Recent Advances in Operator Theory, Operator Algebras, and their Applications written by Dumitru Gaspar and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers peer-reviewed articles from the 19th International Conference on Operator Theory, Summer 2002. It contains recent developments in a broad range of topics from operator theory, operator algebras and their applications, particularly to differential analysis, complex functions, ergodic theory, mathematical physics, matrix analysis, and systems theory. The book covers a large variety of topics including single operator theory, C*-algebras, diffrential operators, integral transforms, stochastic processes and operators, and more.

Recent Advances in Operator Theory

Author : A. Dijksma
Publisher : Birkhäuser
ISBN 13 : 3034883234
Total Pages : 592 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Recent Advances in Operator Theory by : A. Dijksma

Download or read book Recent Advances in Operator Theory written by A. Dijksma and published by Birkhäuser. This book was released on 2012-12-06 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of 25 papers dedicated to Israel Gohberg, an outstanding leader in operator theory. Also containing a review of his contributions to mathematics and a complete list of his publications. The book is of interest to a wide audience of pure and applied mathematicians.

Harmonic Analysis, Partial Differential Equations, Banach Spaces, and Operator Theory (Volume 2)

Author : María Cristina Pereyra
Publisher : Springer
ISBN 13 : 3319515934
Total Pages : 460 pages
Book Rating : 4.3/5 (195 download)

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Book Synopsis Harmonic Analysis, Partial Differential Equations, Banach Spaces, and Operator Theory (Volume 2) by : María Cristina Pereyra

Download or read book Harmonic Analysis, Partial Differential Equations, Banach Spaces, and Operator Theory (Volume 2) written by María Cristina Pereyra and published by Springer. This book was released on 2017-07-10 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the second of a two volume series. Covering a range of subjects from operator theory and classical harmonic analysis to Banach space theory, this book features fully-refereed, high-quality papers exploring new results and trends in weighted norm inequalities, Schur-Agler class functions, complex analysis, dynamical systems, and dyadic harmonic analysis. Graduate students and researchers in analysis will find inspiration in the articles collected in this volume, which emphasize the remarkable connections between harmonic analysis and operator theory. A survey of the two weight problem for the Hilbert transform and an expository article on the Clark model to the case of non-singular measures and applications to the study of rank-one perturbations are included. The material for this volume is based on the 13th New Mexico Analysis Seminar held at the University of New Mexico, April 3-4, 2014 and on several special sections of the Western Spring Sectional Meeting at the University of New Mexico, April 4-6,2014. During the event, participants honored the memory of Cora Sadosky—a great mathematician who recently passed away and who made significant contributions to the field of harmonic analysis. Cora was an exceptional scientist and human being. She was a world expert in harmonic analysis and operator theory, publishing over fifty-five research papers and authoring a major textbook in the field. Participants of the conference include new and senior researchers, recent doctorates as well as leading experts in the area.

Introduction to Model Spaces and their Operators

Author : Stephan Ramon Garcia
Publisher : Cambridge University Press
ISBN 13 : 1316390438
Total Pages : 339 pages
Book Rating : 4.3/5 (163 download)

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Book Synopsis Introduction to Model Spaces and their Operators by : Stephan Ramon Garcia

Download or read book Introduction to Model Spaces and their Operators written by Stephan Ramon Garcia and published by Cambridge University Press. This book was released on 2016-05-17 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of model spaces, the closed invariant subspaces of the backward shift operator, is a vast area of research with connections to complex analysis, operator theory and functional analysis. This self-contained text is the ideal introduction for newcomers to the field. It sets out the basic ideas and quickly takes the reader through the history of the subject before ending up at the frontier of mathematical analysis. Open questions point to potential areas of future research, offering plenty of inspiration to graduate students wishing to advance further.