Quaternionic de Branges Spaces and Characteristic Operator Function

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Publisher : Springer Nature
ISBN 13 : 3030383121
Total Pages : 121 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis Quaternionic de Branges Spaces and Characteristic Operator Function by : Daniel Alpay

Download or read book Quaternionic de Branges Spaces and Characteristic Operator Function written by Daniel Alpay and published by Springer Nature. This book was released on 2020-01-27 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work contributes to the study of quaternionic linear operators. This study is a generalization of the complex case, but the noncommutative setting of quaternions shows several interesting new features, see e.g. the so-called S-spectrum and S-resolvent operators. In this work, we study de Branges spaces, namely the quaternionic counterparts of spaces of analytic functions (in a suitable sense) with some specific reproducing kernels, in the unit ball of quaternions or in the half space of quaternions with positive real parts. The spaces under consideration will be Hilbert or Pontryagin or Krein spaces. These spaces are closely related to operator models that are also discussed. The focus of this book is the notion of characteristic operator function of a bounded linear operator A with finite real part, and we address several questions like the study of J-contractive functions, where J is self-adjoint and unitary, and we also treat the inverse problem, namely to characterize which J-contractive functions are characteristic operator functions of an operator. In particular, we prove the counterpart of Potapov's factorization theorem in this framework. Besides other topics, we consider canonical differential equations in the setting of slice hyperholomorphic functions and we define the lossless inverse scattering problem. We also consider the inverse scattering problem associated with canonical differential equations. These equations provide a convenient unifying framework to discuss a number of questions pertaining, for example, to inverse scattering, non-linear partial differential equations and are studied in the last section of this book.

Quaternionic Closed Operators, Fractional Powers and Fractional Diffusion Processes

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Publisher : Springer
ISBN 13 : 3030164098
Total Pages : 322 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Quaternionic Closed Operators, Fractional Powers and Fractional Diffusion Processes by : Fabrizio Colombo

Download or read book Quaternionic Closed Operators, Fractional Powers and Fractional Diffusion Processes written by Fabrizio Colombo and published by Springer. This book was released on 2019-07-10 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a new theory for evolution operators and a new method for defining fractional powers of vector operators. This new approach allows to define new classes of fractional diffusion and evolution problems. These innovative methods and techniques, based on the concept of S-spectrum, can inspire researchers from various areas of operator theory and PDEs to explore new research directions in their fields. This monograph is the natural continuation of the book: Spectral Theory on the S-Spectrum for Quaternionic Operators by Fabrizio Colombo, Jonathan Gantner, and David P. Kimsey (Operator Theory: Advances and Applications, Vol. 270).

Recent Developments in Operator Theory, Mathematical Physics and Complex Analysis

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Publisher : Springer Nature
ISBN 13 : 3031214609
Total Pages : 424 pages
Book Rating : 4.0/5 (312 download)

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Book Synopsis Recent Developments in Operator Theory, Mathematical Physics and Complex Analysis by : Daniel Alpay

Download or read book Recent Developments in Operator Theory, Mathematical Physics and Complex Analysis written by Daniel Alpay and published by Springer Nature. This book was released on 2023-04-11 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features a collection of papers by plenary, semi-plenary and invited contributors at IWOTA2021, held at Chapman University in hybrid format in August 2021. The topics span areas of current research in operator theory, mathematical physics, and complex analysis.

Michele Sce's Works in Hypercomplex Analysis

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Publisher : Springer Nature
ISBN 13 : 3030502163
Total Pages : 126 pages
Book Rating : 4.0/5 (35 download)

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Book Synopsis Michele Sce's Works in Hypercomplex Analysis by : Fabrizio Colombo

Download or read book Michele Sce's Works in Hypercomplex Analysis written by Fabrizio Colombo and published by Springer Nature. This book was released on 2020-10-24 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents English translations of Michele Sce’s most important works, originally written in Italian during the period 1955-1973, on hypercomplex analysis and algebras of hypercomplex numbers. Despite their importance, these works are not very well known in the mathematics community because of the language they were published in. Possibly the most remarkable instance is the so-called Fueter-Sce mapping theorem, which is a cornerstone of modern hypercomplex analysis, and is not yet understood in its full generality. This volume is dedicated to revealing and describing the framework Sce worked in, at an exciting time when the various generalizations of complex analysis in one variable were still in their infancy. In addition to faithfully translating Sce’s papers, the authors discuss their significance and explain their connections to contemporary research in hypercomplex analysis. They also discuss many concrete examples that can serve as a basis for further research. The vast majority of the results presented here will be new to readers, allowing them to finally access the original sources with the benefit of comments from fellow mathematicians active in the field of hypercomplex analysis. As such, the book offers not only an important chapter in the history of hypercomplex analysis, but also a roadmap for further exciting research in the field.

Operator Theory on One-Sided Quaternion Linear Spaces: Intrinsic $S$-Functional Calculus and Spectral Operators

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Publisher : American Mathematical Society
ISBN 13 : 1470442388
Total Pages : 114 pages
Book Rating : 4.4/5 (74 download)

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Book Synopsis Operator Theory on One-Sided Quaternion Linear Spaces: Intrinsic $S$-Functional Calculus and Spectral Operators by : Jonathan Gantner

Download or read book Operator Theory on One-Sided Quaternion Linear Spaces: Intrinsic $S$-Functional Calculus and Spectral Operators written by Jonathan Gantner and published by American Mathematical Society. This book was released on 2021-02-10 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two major themes drive this article: identifying the minimal structure necessary to formulate quaternionic operator theory and revealing a deep relation between complex and quaternionic operator theory. The theory for quaternionic right linear operators is usually formulated under the assumption that there exists not only a right- but also a left-multiplication on the considered Banach space $V$. This has technical reasons, as the space of bounded operators on $V$ is otherwise not a quaternionic linear space. A right linear operator is however only associated with the right multiplication on the space and in certain settings, for instance on quaternionic Hilbert spaces, the left multiplication is not defined a priori, but must be chosen randomly. Spectral properties of an operator should hence be independent of the left multiplication on the space.

Noncommutative Function-Theoretic Operator Theory and Applications

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Publisher : Cambridge University Press
ISBN 13 : 1009020102
Total Pages : 440 pages
Book Rating : 4.0/5 (9 download)

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Book Synopsis Noncommutative Function-Theoretic Operator Theory and Applications by : Joseph A. Ball

Download or read book Noncommutative Function-Theoretic Operator Theory and Applications written by Joseph A. Ball and published by Cambridge University Press. This book was released on 2021-12-16 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise monograph explores how core ideas in Hardy space function theory and operator theory continue to be useful and informative in new settings, leading to new insights for noncommutative multivariable operator theory. Beginning with a review of the confluence of system theory ideas and reproducing kernel techniques, the book then covers representations of backward-shift-invariant subspaces in the Hardy space as ranges of observability operators, and representations for forward-shift-invariant subspaces via a Beurling–Lax representer equal to the transfer function of the linear system. This pair of backward-shift-invariant and forward-shift-invariant subspace form a generalized orthogonal decomposition of the ambient Hardy space. All this leads to the de Branges–Rovnyak model theory and characteristic operator function for a Hilbert space contraction operator. The chapters that follow generalize the system theory and reproducing kernel techniques to enable an extension of the ideas above to weighted Bergman space multivariable settings.

Operator Theory on One-Sided Quaternion Linear Spaces: Intrinsic $S$-Functional Calculus and Spectral Operators

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Author :
Publisher : American Mathematical Society
ISBN 13 : 1470442388
Total Pages : 114 pages
Book Rating : 4.4/5 (74 download)

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Book Synopsis Operator Theory on One-Sided Quaternion Linear Spaces: Intrinsic $S$-Functional Calculus and Spectral Operators by : Jonathan Gantner

Download or read book Operator Theory on One-Sided Quaternion Linear Spaces: Intrinsic $S$-Functional Calculus and Spectral Operators written by Jonathan Gantner and published by American Mathematical Society. This book was released on 2021-02-10 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two major themes drive this article: identifying the minimal structure necessary to formulate quaternionic operator theory and revealing a deep relation between complex and quaternionic operator theory. The theory for quaternionic right linear operators is usually formulated under the assumption that there exists not only a right- but also a left-multiplication on the considered Banach space $V$. This has technical reasons, as the space of bounded operators on $V$ is otherwise not a quaternionic linear space. A right linear operator is however only associated with the right multiplication on the space and in certain settings, for instance on quaternionic Hilbert spaces, the left multiplication is not defined a priori, but must be chosen randomly. Spectral properties of an operator should hence be independent of the left multiplication on the space.

Exercises in Applied Mathematics

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Publisher : Springer Nature
ISBN 13 : 3031518225
Total Pages : 694 pages
Book Rating : 4.0/5 (315 download)

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Book Synopsis Exercises in Applied Mathematics by : Daniel Alpay

Download or read book Exercises in Applied Mathematics written by Daniel Alpay and published by Springer Nature. This book was released on with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces

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Publisher :
ISBN 13 : 9783034889094
Total Pages : 252 pages
Book Rating : 4.8/5 (89 download)

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Book Synopsis Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces by : Daniel Alpay

Download or read book Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces written by Daniel Alpay and published by . This book was released on 1997-07-15 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mathematical Reviews

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Publisher :
ISBN 13 :
Total Pages : 1208 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Mathematical Reviews by :

Download or read book Mathematical Reviews written by and published by . This book was released on 2007 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Slice Hyperholomorphic Schur Analysis

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Publisher : Birkhäuser
ISBN 13 : 3319425145
Total Pages : 362 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis Slice Hyperholomorphic Schur Analysis by : Daniel Alpay

Download or read book Slice Hyperholomorphic Schur Analysis written by Daniel Alpay and published by Birkhäuser. This book was released on 2016-12-09 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book defines and examines the counterpart of Schur functions and Schur analysis in the slice hyperholomorphic setting. It is organized into three parts: the first introduces readers to classical Schur analysis, while the second offers background material on quaternions, slice hyperholomorphic functions, and quaternionic functional analysis. The third part represents the core of the book and explores quaternionic Schur analysis and its various applications. The book includes previously unpublished results and provides the basis for new directions of research.

New Directions in Function Theory: From Complex to Hypercomplex to Non-Commutative

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Publisher :
ISBN 13 : 9783030764746
Total Pages : 0 pages
Book Rating : 4.7/5 (647 download)

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Book Synopsis New Directions in Function Theory: From Complex to Hypercomplex to Non-Commutative by : Daniel Alpay

Download or read book New Directions in Function Theory: From Complex to Hypercomplex to Non-Commutative written by Daniel Alpay and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected contributions from experts gathered at Chapman University for a conference held in November 2019 on new directions in function theory. The papers, written by leading researchers in the field, relate to hypercomplex analysis, Schur analysis and de Branges spaces, new aspects of classical function theory, and infinite dimensional analysis. Signal processing constitutes a strong presence in several of the papers. A second volume in this series of conferences, this book will appeal to mathematicians interested in learning about new fields of development in function theory.

Noncommutative Functional Calculus

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Publisher : Springer Science & Business Media
ISBN 13 : 3034801106
Total Pages : 228 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Noncommutative Functional Calculus by : Prof. Fabrizio Colombo Politecnico di Milano

Download or read book Noncommutative Functional Calculus written by Prof. Fabrizio Colombo Politecnico di Milano and published by Springer Science & Business Media. This book was released on 2011-03-18 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a functional calculus for n-tuples of not necessarily commuting linear operators. In particular, a functional calculus for quaternionic linear operators is developed. These calculi are based on a new theory of hyperholomorphicity for functions with values in a Clifford algebra: the so-called slice monogenic functions which are carefully described in the book. In the case of functions with values in the algebra of quaternions these functions are named slice regular functions. Except for the appendix and the introduction all results are new and appear for the first time organized in a monograph. The material has been carefully prepared to be as self-contained as possible. The intended audience consists of researchers, graduate and postgraduate students interested in operator theory, spectral theory, hypercomplex analysis, and mathematical physics.

System Theory, the Schur Algorithm and Multidimensional Analysis

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Publisher : Springer Science & Business Media
ISBN 13 : 376438137X
Total Pages : 331 pages
Book Rating : 4.7/5 (643 download)

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Book Synopsis System Theory, the Schur Algorithm and Multidimensional Analysis by : Daniel Alpay

Download or read book System Theory, the Schur Algorithm and Multidimensional Analysis written by Daniel Alpay and published by Springer Science & Business Media. This book was released on 2007-06-28 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains six peer-refereed articles written on the occasion of the workshop Operator theory, system theory and scattering theory: multidimensional generalizations and related topics, held at the Department of Mathematics of the Ben-Gurion University of the Negev in June, 2005. The book will interest a wide audience of pure and applied mathematicians, electrical engineers and theoretical physicists.

Hypercomplex Analysis: New Perspectives and Applications

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Publisher : Springer
ISBN 13 : 3319087711
Total Pages : 228 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Hypercomplex Analysis: New Perspectives and Applications by : Swanhild Bernstein

Download or read book Hypercomplex Analysis: New Perspectives and Applications written by Swanhild Bernstein and published by Springer. This book was released on 2014-10-10 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypercomplex analysis is the extension of complex analysis to higher dimensions where the concept of a holomorphic function is substituted by the concept of a monogenic function. In recent decades this theory has come to the forefront of higher dimensional analysis. There are several approaches to this: quaternionic analysis which merely uses quaternions, Clifford analysis which relies on Clifford algebras, and generalizations of complex variables to higher dimensions such as split-complex variables. This book includes a selection of papers presented at the session on quaternionic and hypercomplex analysis at the ISAAC conference 2013 in Krakow, Poland. The topics covered represent new perspectives and current trends in hypercomplex analysis and applications to mathematical physics, image analysis and processing, and mechanics.

A Complex Analysis Problem Book

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Publisher : Birkhäuser
ISBN 13 : 3319421816
Total Pages : 592 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis A Complex Analysis Problem Book by : Daniel Alpay

Download or read book A Complex Analysis Problem Book written by Daniel Alpay and published by Birkhäuser. This book was released on 2016-10-26 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition presents a collection of exercises on the theory of analytic functions, including completed and detailed solutions. It introduces students to various applications and aspects of the theory of analytic functions not always touched on in a first course, while also addressing topics of interest to electrical engineering students (e.g., the realization of rational functions and its connections to the theory of linear systems and state space representations of such systems). It provides examples of important Hilbert spaces of analytic functions (in particular the Hardy space and the Fock space), and also includes a section reviewing essential aspects of topology, functional analysis and Lebesgue integration. Benefits of the 2nd edition Rational functions are now covered in a separate chapter. Further, the section on conformal mappings has been expanded.

Intertwingled

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Publisher : Springer
ISBN 13 : 3319169254
Total Pages : 150 pages
Book Rating : 4.3/5 (191 download)

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Book Synopsis Intertwingled by : Douglas R. Dechow

Download or read book Intertwingled written by Douglas R. Dechow and published by Springer. This book was released on 2015-07-03 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This engaging volume celebrates the life and work of Theodor Holm “Ted” Nelson, a pioneer and legendary figure from the history of early computing. Presenting contributions from world-renowned computer scientists and figures from the media industry, the book delves into hypertext, the docuverse, Xanadu and other products of Ted Nelson’s unique mind. Features: includes a cartoon and a sequence of poems created in Nelson’s honor, reflecting his wide-ranging and interdisciplinary intellect; presents peer histories, providing a sense of the milieu that resulted from Nelson’s ideas; contains personal accounts revealing what it is like to collaborate directly with Nelson; describes Nelson’s legacy from the perspective of his contemporaries from the computing world; provides a contribution from Ted Nelson himself. With a broad appeal spanning computer scientists, science historians and the general reader, this inspiring collection reveals the continuing influence of the original visionary of the World Wide Web.