Numerical Ranges of Operators on Normed Spaces and of Elements of Normed Algebras

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Publisher : CUP Archive
ISBN 13 : 0521079888
Total Pages : 149 pages
Book Rating : 4.5/5 (21 download)

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Book Synopsis Numerical Ranges of Operators on Normed Spaces and of Elements of Normed Algebras by : F. F. Bonsall

Download or read book Numerical Ranges of Operators on Normed Spaces and of Elements of Normed Algebras written by F. F. Bonsall and published by CUP Archive. This book was released on 1971-03-02 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors develop various applications, in particular to the study of Banach algebras where the numerical range provides an important link between the algebraic and metric structures.

Numerical Ranges II

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Publisher : Cambridge University Press
ISBN 13 : 0521202272
Total Pages : 189 pages
Book Rating : 4.5/5 (212 download)

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Book Synopsis Numerical Ranges II by : F. F. Bonsall

Download or read book Numerical Ranges II written by F. F. Bonsall and published by Cambridge University Press. This book was released on 1973-08-02 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: The landlady, landlord, cat, trap, and cheese all take credit for catching the long-tailed rat who is really the only one who knows the truth of the matter.

Numerical Range

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Publisher : Springer Science & Business Media
ISBN 13 : 1461384982
Total Pages : 202 pages
Book Rating : 4.4/5 (613 download)

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Book Synopsis Numerical Range by : Karl E. Gustafson

Download or read book Numerical Range written by Karl E. Gustafson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theories of quadratic forms and their applications appear in many parts of mathematics and the sciences. All students of mathematics have the opportunity to encounter such concepts and applications in their first course in linear algebra. This subject and its extensions to infinite dimen sions comprise the theory of the numerical range W(T). There are two competing names for W(T), namely, the numerical range of T and the field of values for T. The former has been favored historically by the func tional analysis community, the latter by the matrix analysis community. It is a toss-up to decide which is preferable, and we have finally chosen the former because it is our habit, it is a more efficient expression, and because in recent conferences dedicated to W(T), even the linear algebra commu nity has adopted it. Also, one universally refers to the numerical radius, and not to the field of values radius. Originally, Toeplitz and Hausdorff called it the Wertvorrat of a bilinear form, so other good names would be value field or form values. The Russian community has referred to it as the Hausdorff domain. Murnaghan in his early paper first called it the region of the complex plane covered by those values for an n x n matrix T, then the range of values of a Hermitian matrix, then the field of values when he analyzed what he called the sought-for region.

Complete Normed Algebras

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Publisher : Springer Science & Business Media
ISBN 13 : 3642656692
Total Pages : 312 pages
Book Rating : 4.6/5 (426 download)

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Book Synopsis Complete Normed Algebras by : Frank F. Bonsall

Download or read book Complete Normed Algebras written by Frank F. Bonsall and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: The axioms of a complex Banach algebra were very happily chosen. They are simple enough to allow wide ranging fields of application, notably in harmonic analysis, operator theory and function algebras. At the same time they are tight enough to allow the development of a rich collection of results, mainly through the interplay of the elementary parts of the theories of analytic functions, rings, and Banach spaces. Many of the theorems are things of great beauty, simple in statement, surprising in content, and elegant in proof. We believe that some of them deserve to be known by every mathematician. The aim of this book is to give an account of the principal methods and results in the theory of Banach algebras, both commutative and non commutative. It has been necessary to apply certain exclusion principles in order to keep our task within bounds. Certain classes of concrete Banach algebras have a very rich literature, namely C*-algebras, function algebras, and group algebras. We have regarded these highly developed theories as falling outside our scope. We have not entirely avoided them, but have been concerned with their place in the general theory, and have stopped short of developing their special properties. For reasons of space and time we have omitted certain other topics which would quite naturally have been included, in particular the theories of multipliers and of extensions of Banach algebras, and the implications for Banach algebras of some of the standard algebraic conditions on rings.

Limit Operators and Their Applications in Operator Theory

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Publisher : Birkhäuser
ISBN 13 : 3034879113
Total Pages : 404 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Limit Operators and Their Applications in Operator Theory by : Vladimir Rabinovich

Download or read book Limit Operators and Their Applications in Operator Theory written by Vladimir Rabinovich and published by Birkhäuser. This book was released on 2012-12-06 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first monograph devoted to a fairly wide class of operators, namely band and band-dominated operators and their Fredholm theory. The main tool in studying this topic is limit operators. Applications are presented to several important classes of such operators: convolution type operators and pseudo-differential operators on bad domains and with bad coefficients.

Topological Algebras with Involution

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Publisher : Elsevier
ISBN 13 : 0080461220
Total Pages : 514 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Topological Algebras with Involution by : M. Fragoulopoulou

Download or read book Topological Algebras with Involution written by M. Fragoulopoulou and published by Elsevier. This book was released on 2005-07-26 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book familiarizes both popular and fundamental notions and techniques from the theory of non-normed topological algebras with involution, demonstrating with examples and basic results the necessity of this perspective. The main body of the book is focussed on the Hilbert-space (bounded) representation theory of topological *-algebras and their topological tensor products, since in our physical world, apart from the majority of the existing unbounded operators, we often meet operators that are forced to be bounded, like in the case of symmetric *-algebras. So, one gets an account of how things behave, when the mathematical structures are far from being algebras endowed with a complete or non-complete algebra norm. In problems related with mathematical physics, such instances are, indeed, quite common.Key features:- Lucid presentation- Smooth in reading- Informative- Illustrated by examples- Familiarizes the reader with the non-normed *-world- Encourages the hesitant- Welcomes new comers.- Well written and lucid presentation.- Informative and illustrated by examples.- Familiarizes the reader with the non-normed *-world.

Spectra and Pseudospectra

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Publisher : Princeton University Press
ISBN 13 : 0691213100
Total Pages : 626 pages
Book Rating : 4.6/5 (912 download)

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Book Synopsis Spectra and Pseudospectra by : Lloyd N. Trefethen

Download or read book Spectra and Pseudospectra written by Lloyd N. Trefethen and published by Princeton University Press. This book was released on 2020-05-05 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pure and applied mathematicians, physicists, scientists, and engineers use matrices and operators and their eigenvalues in quantum mechanics, fluid mechanics, structural analysis, acoustics, ecology, numerical analysis, and many other areas. However, in some applications the usual analysis based on eigenvalues fails. For example, eigenvalues are often ineffective for analyzing dynamical systems such as fluid flow, Markov chains, ecological models, and matrix iterations. That's where this book comes in. This is the authoritative work on nonnormal matrices and operators, written by the authorities who made them famous. Each of the sixty sections is written as a self-contained essay. Each document is a lavishly illustrated introductory survey of its topic, complete with beautiful numerical experiments and all the right references. The breadth of included topics and the numerous applications that provide links between fields will make this an essential reference in mathematics and related sciences.

Isometries on Banach Spaces

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Publisher : CRC Press
ISBN 13 : 1420026151
Total Pages : 209 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Isometries on Banach Spaces by : Richard J. Fleming

Download or read book Isometries on Banach Spaces written by Richard J. Fleming and published by CRC Press. This book was released on 2002-12-23 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental to the study of any mathematical structure is an understanding of its symmetries. In the class of Banach spaces, this leads naturally to a study of isometries-the linear transformations that preserve distances. In his foundational treatise, Banach showed that every linear isometry on the space of continuous functions on a compact metric

Approximate Identities and Factorization in Banach Modules

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Publisher : Springer
ISBN 13 : 3540385339
Total Pages : 314 pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Approximate Identities and Factorization in Banach Modules by : R. S. Doran

Download or read book Approximate Identities and Factorization in Banach Modules written by R. S. Doran and published by Springer. This book was released on 2006-12-08 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Linear Operators and Approximation / Lineare Operatoren und Approximation

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Publisher : Birkhäuser
ISBN 13 : 3034872836
Total Pages : 499 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Linear Operators and Approximation / Lineare Operatoren und Approximation by : Bautzer

Download or read book Linear Operators and Approximation / Lineare Operatoren und Approximation written by Bautzer and published by Birkhäuser. This book was released on 2012-12-06 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain the lectures presented at the Conference on Linear Operators and Approximation held at the Oberwolfach Mathematical Research In stitute, August 14-22, 1971. There were thirty-eight such lectures while four addi tional papers, subsequently submitted in writing, are also included in this volume. Two of the three lectures presented by Russian mathematicians are rendered in English, the third in Russian. Furthermore, there is areport on new and unsolved problems based upon special problem sessions, with later communications from the participants. In fact, two of the papers inc1uded are devoted to solutions of some of the problems posed. The papers have been classified according to subject matter into five chapters, but it needs little emphasis that such thematic groupings are necessarily somewhat arbitrary. Thus Chapter I on Operator Theory is concerned with linear and non linear semi-groups, structure of single operators, unitary operators, spectral and ergodic theory. Chapter Il on Topics in Functional Analysis inc1udes papers on Riesz spaces, boundedness theorems, generalized limits, and distributions. Chapter III, entitled "Approximation in Abstract Spaces", ranges from characterizations of c1asses of functions in approximation theory to approximation-theoretical topics connected with extensions to Banach (or more general) spaces. Chapter IV contains papers on harmonic analysis in connection with approximation and, finally, Chapter V is devoted to approximation by splines, algebraic polynomials, rational functions, and to Pade approximation. A large part of the general editorial work connected with these proceedings was competently handled by Miss F. Feber, while G.

Banach Spaces

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Publisher : Springer
ISBN 13 : 3540397361
Total Pages : 205 pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Banach Spaces by : Nigel J. Kalton

Download or read book Banach Spaces written by Nigel J. Kalton and published by Springer. This book was released on 2006-11-14 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Problems and Methods in Mathematical Physics

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Publisher : Birkhäuser
ISBN 13 : 3034882769
Total Pages : 530 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Problems and Methods in Mathematical Physics by : Johannes Elschner

Download or read book Problems and Methods in Mathematical Physics written by Johannes Elschner and published by Birkhäuser. This book was released on 2012-12-06 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the proceedings of the 11th Conference on Problems and Methods in Mathematical Physics (11th TMP), held in Chemnitz, March 25-28, 1999. The conference was dedicated to the memory of Siegfried Prössdorf, who made important contributions to the theory and numerical analysis of operator equations and their applications in mathematical physics and mechanics. The main part of the book comprises original research papers. The topics are ranging from integral and pseudodifferential equations, boundary value problems, operator theory, boundary element and wavelet methods, approximation theory and inverse problems to various concrete problems and applications in physics and engineering, and reflect Prössdorf's broad spectrum of research activities. The volume also contains articles describing the life and mathematical achievements of Siegfried Prössdorf and includes a list of his publications. The book is addressed to a wide audience in the mathematical and engineering sciences.

Canadian Mathematical Bulletin

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Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4./5 ( download)

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Book Synopsis Canadian Mathematical Bulletin by :

Download or read book Canadian Mathematical Bulletin written by and published by . This book was released on 1983-06 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Course in Functional Analysis and Measure Theory

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Publisher : Springer
ISBN 13 : 3319920049
Total Pages : 553 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis A Course in Functional Analysis and Measure Theory by : Vladimir Kadets

Download or read book A Course in Functional Analysis and Measure Theory written by Vladimir Kadets and published by Springer. This book was released on 2018-07-10 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an expert on the topic and experienced lecturer, this textbook provides an elegant, self-contained introduction to functional analysis, including several advanced topics and applications to harmonic analysis. Starting from basic topics before proceeding to more advanced material, the book covers measure and integration theory, classical Banach and Hilbert space theory, spectral theory for bounded operators, fixed point theory, Schauder bases, the Riesz-Thorin interpolation theorem for operators, as well as topics in duality and convexity theory. Aimed at advanced undergraduate and graduate students, this book is suitable for both introductory and more advanced courses in functional analysis. Including over 1500 exercises of varying difficulty and various motivational and historical remarks, the book can be used for self-study and alongside lecture courses.

Nonlinear Spectral Theory

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Publisher : Walter de Gruyter
ISBN 13 : 3110181436
Total Pages : 420 pages
Book Rating : 4.1/5 (11 download)

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Book Synopsis Nonlinear Spectral Theory by : Jürgen Appell

Download or read book Nonlinear Spectral Theory written by Jürgen Appell and published by Walter de Gruyter. This book was released on 2004 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: In view of the eminent importance of spectral theory of linear operators in many fields of mathematics and physics, it is not surprising that various attempts have been made to define and study spectra also for nonlinear operators. This book provides a comprehensive and self-contained treatment of the theory, methods, and applications of nonlinear spectral theory. The first chapter briefly recalls the definition and properties of the spectrum and several subspectra for bounded linear operators. Then some numerical characteristics for nonlinear operators are introduced which are useful for describing those classes of operators for which there exists a spectral theory. Since spectral values are closely related to solvability results for operator equations, various conditions for the local or global invertibility of a nonlinear operator are collected in the third chapter. The following two chapters are concerned with spectra for certain classes of continuous, Lipschitz continuous, or differentiable operators. These spectra, however, simply adapt the corresponding definitions from the linear theory which somehow restricts their applicability. Other spectra which are defined in a completely different way, but seem to have useful applications, are defined and studied in the following four chapters. The remaining three chapters are more application-oriented and deal with nonlinear eigenvalue problems, numerical ranges, and selected applications to nonlinear problems. The only prerequisite for understanding this book is a modest background in functional analysis and operator theory. It is addressed to non-specialists who want to get an idea of the development of spectral theory for nonlinear operators in the last 30 years, as well as a glimpse of the diversity of the directions in which current research is moving.

Invariant Subspaces of the Shift Operator

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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.

Mathematical works

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Author :
Publisher : Walter de Gruyter
ISBN 13 : 9783110124538
Total Pages : 660 pages
Book Rating : 4.1/5 (245 download)

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Book Synopsis Mathematical works by : Helmut Wielandt

Download or read book Mathematical works written by Helmut Wielandt and published by Walter de Gruyter. This book was released on 1996 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: