Numerical Ranges And Commutation Properties Of Hilbert Space Operators

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Commutation Properties of Hilbert Space Operators and Related Topics

Author : Calvin R. Putnam
Publisher : Springer Science & Business Media
ISBN 13 : 3642859380
Total Pages : 177 pages
Book Rating : 4.6/5 (428 download)

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Book Synopsis Commutation Properties of Hilbert Space Operators and Related Topics by : Calvin R. Putnam

Download or read book Commutation Properties of Hilbert Space Operators and Related Topics written by Calvin R. Putnam and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: What could be regarded as the beginning of a theory of commutators AB - BA of operators A and B on a Hilbert space, considered as a dis cipline in itself, goes back at least to the two papers of Weyl [3] {1928} and von Neumann [2] {1931} on quantum mechanics and the commuta tion relations occurring there. Here A and B were unbounded self-adjoint operators satisfying the relation AB - BA = iI, in some appropriate sense, and the problem was that of establishing the essential uniqueness of the pair A and B. The study of commutators of bounded operators on a Hilbert space has a more recent origin, which can probably be pinpointed as the paper of Wintner [6] {1947}. An investigation of a few related topics in the subject is the main concern of this brief monograph. The ensuing work considers commuting or "almost" commuting quantities A and B, usually bounded or unbounded operators on a Hilbert space, but occasionally regarded as elements of some normed space. An attempt is made to stress the role of the commutator AB - BA, and to investigate its properties, as well as those of its components A and B when the latter are subject to various restrictions. Some applica tions of the results obtained are made to quantum mechanics, perturba tion theory, Laurent and Toeplitz operators, singular integral trans formations, and Jacobi matrices.

Numerical Ranges of Hilbert Space Operators

Author : Hwa-Long Gau
Publisher : Cambridge University Press
ISBN 13 : 1108787606
Total Pages : 556 pages
Book Rating : 4.1/5 (87 download)

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Book Synopsis Numerical Ranges of Hilbert Space Operators by : Hwa-Long Gau

Download or read book Numerical Ranges of Hilbert Space Operators written by Hwa-Long Gau and published by Cambridge University Press. This book was released on 2021-08-05 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Starting with elementary operator theory and matrix analysis, this book introduces the basic properties of the numerical range and gradually builds up the whole numerical range theory. Over 400 assorted problems, ranging from routine exercises to published research results, give you the chance to put the theory into practice and test your understanding. Interspersed throughout the text are numerous comments and references, allowing you to discover related developments and to pursue areas of interest in the literature. Also included is an appendix on basic convexity properties on the Euclidean space. Targeted at graduate students as well as researchers interested in functional analysis, this book provides a comprehensive coverage of classic and recent works on the numerical range theory. It serves as an accessible entry point into this lively and exciting research area.

Product and Commutation Properties of Hilbert Space Operators

Author : Michael John Hoffman
Publisher :
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (34 download)

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Book Synopsis Product and Commutation Properties of Hilbert Space Operators by : Michael John Hoffman

Download or read book Product and Commutation Properties of Hilbert Space Operators written by Michael John Hoffman and published by . This book was released on 1979 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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

Author : F. F. Bonsall
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.

An Operator Theory Problem Book

Author : Mohammed Hichem Mortad
Publisher : World Scientific
ISBN 13 : 9813236272
Total Pages : 656 pages
Book Rating : 4.8/5 (132 download)

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Book Synopsis An Operator Theory Problem Book by : Mohammed Hichem Mortad

Download or read book An Operator Theory Problem Book written by Mohammed Hichem Mortad and published by World Scientific. This book was released on 2018-10-15 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is for third and fourth year university mathematics students (and Master students) as well as lecturers and tutors in mathematics and anyone who needs the basic facts on Operator Theory (e.g. Quantum Mechanists). The main setting for bounded linear operators here is a Hilbert space. There is, however, a generous part on General Functional Analysis (not too advanced though). There is also a chapter on Unbounded Closed Operators.The book is divided into two parts. The first part contains essential background on all of the covered topics with the sections: True or False Questions, Exercises, Tests and More Exercises. In the second part, readers may find answers and detailed solutions to the True or False Questions, Exercises and Tests.Another virtue of the book is the variety of the topics and the exercises and the way they are tackled. In many cases, the approaches are different from what is known in the literature. Also, some very recent results from research papers are included.

Numerical Range

Author : Karl E. Gustafson
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.

Operators on Hilbert Space

Author : V. S. Sunder
Publisher : Springer
ISBN 13 : 9811018162
Total Pages : 107 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Operators on Hilbert Space by : V. S. Sunder

Download or read book Operators on Hilbert Space written by V. S. Sunder and published by Springer. This book was released on 2016-08-05 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primarily objective of the book is to serve as a primer on the theory of bounded linear operators on separable Hilbert space. The book presents the spectral theorem as a statement on the existence of a unique continuous and measurable functional calculus. It discusses a proof without digressing into a course on the Gelfand theory of commutative Banach algebras. The book also introduces the reader to the basic facts concerning the various von Neumann–Schatten ideals, the compact operators, the trace-class operators and all bounded operators.

Invitation to Linear Operators

Author : Takayuki Furuta
Publisher : CRC Press
ISBN 13 : 9780415267991
Total Pages : 276 pages
Book Rating : 4.2/5 (679 download)

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Book Synopsis Invitation to Linear Operators by : Takayuki Furuta

Download or read book Invitation to Linear Operators written by Takayuki Furuta and published by CRC Press. This book was released on 2001-07-26 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most books on linear operators are not easy to follow for students and researchers without an extensive background in mathematics. Self-contained and using only matrix theory, Invitation to Linear Operators: From Matricies to Bounded Linear Operators on a Hilbert Space explains in easy-to-follow steps a variety of interesting recent results on linear operators on a Hilbert space. The author first states the important properties of a Hilbert space, then sets out the fundamental properties of bounded linear operators on a Hilbert space. The final section presents some of the more recent developments in bounded linear operators.

Matrix and Operator Equations and Applications

Author : Mohammad Sal Moslehian
Publisher : Springer Nature
ISBN 13 : 3031253868
Total Pages : 763 pages
Book Rating : 4.0/5 (312 download)

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Book Synopsis Matrix and Operator Equations and Applications by : Mohammad Sal Moslehian

Download or read book Matrix and Operator Equations and Applications written by Mohammad Sal Moslehian and published by Springer Nature. This book was released on 2023-07-29 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concerns matrix and operator equations that are widely applied in various disciplines of science to formulate challenging problems and solve them in a faithful way. The main aim of this contributed book is to study several important matrix and operator equalities and equations in a systematic and self-contained fashion. Some powerful methods have been used to investigate some significant equations in functional analysis, operator theory, matrix analysis, and numerous subjects in the last decades. The book is divided into two parts: (I) Matrix Equations and (II) Operator Equations. In the first part, the state-of-the-art of systems of matrix equations is given and generalized inverses are used to find their solutions. The semi-tensor product of matrices is used to solve quaternion matrix equations. The contents of some chapters are related to the relationship between matrix inequalities, matrix means, numerical range, and matrix equations. In addition, quaternion algebras and their applications are employed in solving some famous matrix equations like Sylvester, Stein, and Lyapunov equations. A chapter devoted to studying Hermitian polynomial matrix equations, which frequently arise from linear-quadratic control problems. Moreover, some classical and recently discovered inequalities for matrix exponentials are reviewed. In the second part, the latest developments in solving several equations appearing in modern operator theory are demonstrated. These are of interest to a wide audience of pure and applied mathematicians. For example, the Daugavet equation in the linear and nonlinear setting, iterative processes and Volterra-Fredholm integral equations, semicircular elements induced by connected finite graphs, free probability, singular integral operators with shifts, and operator differential equations closely related to the properties of the coefficient operators in some equations are discussed. The chapters give a comprehensive account of their subjects. The exhibited chapters are written in a reader-friendly style and can be read independently. Each chapter contains a rich bibliography. This book is intended for use by both researchers and graduate students of mathematics, physics, and engineering.

Joint numerical range and joint spectrum of hilbert space opera...

Author : Nicolaas Pieter Dekker
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (26 download)

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Book Synopsis Joint numerical range and joint spectrum of hilbert space opera... by : Nicolaas Pieter Dekker

Download or read book Joint numerical range and joint spectrum of hilbert space opera... written by Nicolaas Pieter Dekker and published by . This book was released on 19?? with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Linear Transformations in Hilbert Space and Their Applications to Analysis

Author : Marshall Harvey Stone
Publisher : American Mathematical Soc.
ISBN 13 : 0821810154
Total Pages : 632 pages
Book Rating : 4.8/5 (218 download)

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Book Synopsis Linear Transformations in Hilbert Space and Their Applications to Analysis by : Marshall Harvey Stone

Download or read book Linear Transformations in Hilbert Space and Their Applications to Analysis written by Marshall Harvey Stone and published by American Mathematical Soc.. This book was released on 1932-12-31 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Inequalities for the Numerical Radius of Linear Operators in Hilbert Spaces

Author : Silvestru Sever Dragomir
Publisher : Springer Science & Business Media
ISBN 13 : 331901448X
Total Pages : 130 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Inequalities for the Numerical Radius of Linear Operators in Hilbert Spaces by : Silvestru Sever Dragomir

Download or read book Inequalities for the Numerical Radius of Linear Operators in Hilbert Spaces written by Silvestru Sever Dragomir and published by Springer Science & Business Media. This book was released on 2013-09-14 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aimed toward researchers, postgraduate students, and scientists in linear operator theory and mathematical inequalities, this self-contained monograph focuses on numerical radius inequalities for bounded linear operators on complex Hilbert spaces for the case of one and two operators. Students at the graduate level will learn some essentials that may be useful for reference in courses in functional analysis, operator theory, differential equations, and quantum computation, to name several. Chapter 1 presents fundamental facts about the numerical range and the numerical radius of bounded linear operators in Hilbert spaces. Chapter 2 illustrates recent results obtained concerning numerical radius and norm inequalities for one operator on a complex Hilbert space, as well as some special vector inequalities in inner product spaces due to Buzano, Goldstein, Ryff and Clarke as well as some reverse Schwarz inequalities and Grüss type inequalities obtained by the author. Chapter 3 presents recent results regarding the norms and the numerical radii of two bounded linear operators. The techniques shown in this chapter are elementary but elegant and may be accessible to undergraduate students with a working knowledge of operator theory. A number of vector inequalities in inner product spaces as well as inequalities for means of nonnegative real numbers are also employed in this chapter. All the results presented are completely proved and the original references are mentioned.

Topics in Operator Theory

Author : Joseph A. Ball
Publisher : Springer Science & Business Media
ISBN 13 : 3034601581
Total Pages : 624 pages
Book Rating : 4.0/5 (346 download)

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Book Synopsis Topics in Operator Theory by : Joseph A. Ball

Download or read book Topics in Operator Theory written by Joseph A. Ball and published by Springer Science & Business Media. This book was released on 2011-02-09 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first volume of a collection of original and review articles on recent advances and new directions in a multifaceted and interconnected area of mathematics and its applications. It encompasses many topics in theoretical developments in operator theory and its diverse applications in applied mathematics, physics, engineering, and other disciplines. The purpose is to bring in one volume many important original results of cutting edge research as well as authoritative review of recent achievements, challenges, and future directions in the area of operator theory and its applications.

A Hilbert Space Problem Book

Author : P.R. Halmos
Publisher : Springer Science & Business Media
ISBN 13 : 1468493302
Total Pages : 385 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis A Hilbert Space Problem Book by : P.R. Halmos

Download or read book A Hilbert Space Problem Book written by P.R. Halmos and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the Preface: "This book was written for the active reader. The first part consists of problems, frequently preceded by definitions and motivation, and sometimes followed by corollaries and historical remarks... The second part, a very short one, consists of hints... The third part, the longest, consists of solutions: proofs, answers, or contructions, depending on the nature of the problem.... This is not an introduction to Hilbert space theory. Some knowledge of that subject is a prerequisite: at the very least, a study of the elements of Hilbert space theory should proceed concurrently with the reading of this book."

Operator Commutation Relations

Author : P.E.T. Jørgensen
Publisher : Springer Science & Business Media
ISBN 13 : 9400963289
Total Pages : 506 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Operator Commutation Relations by : P.E.T. Jørgensen

Download or read book Operator Commutation Relations written by P.E.T. Jørgensen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: In his Retiring Presidential address, delivered before the Annual Meeting of The American Mathematical Society on December, 1948, the late Professor Einar Hille spoke on his recent results on the Lie theory of semigroups of linear transformations, . . • "So far only commutative operators have been considered and the product law . . . is the simplest possible. The non-commutative case has resisted numerous attacks in the past and it is only a few months ago that any headway was made with this problem. I shall have the pleasure of outlining the new theory here; it is a blend of the classical theory of Lie groups with the recent theory of one-parameter semigroups. " The list of references in the subsequent publication of Hille's address (Bull. Amer. Math •. Soc. 56 (1950)) includes pioneering papers of I. E. Segal, I. M. Gelfand, and K. Yosida. In the following three decades the subject grew tremendously in vitality, incorporating a number of different fields of mathematical analysis. Early papers of V. Bargmann, I. E. Segal, L. G~ding, Harish-Chandra, I. M. Singer, R. Langlands, B. Konstant, and E. Nelson developed the theoretical basis for later work in a variety of different applications: Mathematical physics, astronomy, partial differential equations, operator algebras, dynamical systems, geometry, and, most recently, stochastic filtering theory. As it turned out, of course, the Lie groups, rather than the semigroups, provided the focus of attention.

Hilbert Space Operators in Quantum Physics

Author : Jirí Blank
Publisher : Springer Science & Business Media
ISBN 13 : 1402088701
Total Pages : 677 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Hilbert Space Operators in Quantum Physics by : Jirí Blank

Download or read book Hilbert Space Operators in Quantum Physics written by Jirí Blank and published by Springer Science & Business Media. This book was released on 2008-09-24 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of this book detailing the theory of linear-Hilbert space operators and their use in quantum physics contains two new chapters devoted to properties of quantum waveguides and quantum graphs. The bibliography contains 130 new items.

Unitary Invariants in Multivariable Operator Theory

Author : Gelu Popescu
Publisher : American Mathematical Soc.
ISBN 13 : 0821843966
Total Pages : 105 pages
Book Rating : 4.8/5 (218 download)

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Book Synopsis Unitary Invariants in Multivariable Operator Theory by : Gelu Popescu

Download or read book Unitary Invariants in Multivariable Operator Theory written by Gelu Popescu and published by American Mathematical Soc.. This book was released on 2009-06-05 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper concerns unitary invariants for $n$-tuples $T:=(T_1,\ldots, T_n)$ of (not necessarily commuting) bounded linear operators on Hilbert spaces. The author introduces a notion of joint numerical radius and works out its basic properties. Multivariable versions of Berger's dilation theorem, Berger-Kato-Stampfli mapping theorem, and Schwarz's lemma from complex analysis are obtained. The author studies the joint (spatial) numerical range of $T$ in connection with several unitary invariants for $n$-tuples of operators such as: right joint spectrum, joint numerical radius, euclidean operator radius, and joint spectral radius. He also proves an analogue of Toeplitz-Hausdorff theorem on the convexity of the spatial numerical range of an operator on a Hilbert space, for the joint numerical range of operators in the noncommutative analytic Toeplitz algebra $F_n^\infty$.