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S-Essential Spectra and the Weyl Pseudospectra of Linear Operators

2015-10-22
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Release : 2015-10-22
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Kind : eBook
Book Rating : 127/5 ( reviews)

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Book Synopsis S-Essential Spectra and the Weyl Pseudospectra of Linear Operators by : Ammar Aymen

Download or read book S-Essential Spectra and the Weyl Pseudospectra of Linear Operators written by Ammar Aymen. This book was released on 2015-10-22. Available in PDF, EPUB and Kindle. Book excerpt: In this work we present a spectral study of semi regular operator. The concept of semi regularity and essentially semi regularity amongst the various concepts of regularity originating from Fredholm theory, and we introduce new notions and unprecedented denition to develop pseudospectral theory. We built our denition on the basis of essential spectra and tried to comply it with pseudospectral theory. So, we intend to obtain what we call "Weyl pseudospectra."

Linear Operators and Their Essential Pseudospectra

2018-04-17 Mathematics
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Release : 2018-04-17
Genre : Mathematics
Kind : eBook
Book Rating : 25X/5 ( reviews)

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Book Synopsis Linear Operators and Their Essential Pseudospectra by : Aref Jeribi

Download or read book Linear Operators and Their Essential Pseudospectra written by Aref Jeribi. This book was released on 2018-04-17. Available in PDF, EPUB and Kindle. Book excerpt: Linear Operators and Their Essential Pseudospectra provides a comprehensive study of spectral theory of linear operators defined on Banach spaces. The central items of interest in the volume include various essential spectra, but the author also considers some of the generalizations that have been studied. In recent years, spectral theory has witnessed an explosive development. This volume presents a survey of results concerning various types of essential spectra and pseudospectra in a unified, axiomatic way and also discusses several topics that are new but which relate to the concepts and methods emanating from the book. The main topics include essential spectra, essential pseudospectra, structured essential pseudospectra, and their relative sets. This volume will be very useful for several researchers since it represents not only a collection of previously heterogeneous material but also includes discussions of innovation through several extensions. As the spectral theory of operators is an important part of functional analysis and has numerous applications in many areas of mathematics, the author suggests that some modest prerequisites from functional analysis and operator theory should be in place to be accessible to newcomers and graduate students of mathematics.

Spectral Theory and Applications of Linear Operators and Block Operator Matrices

2015-07-04 Science
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Release : 2015-07-04
Genre : Science
Kind : eBook
Book Rating : 661/5 ( reviews)

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Book Synopsis Spectral Theory and Applications of Linear Operators and Block Operator Matrices by : Aref Jeribi

Download or read book Spectral Theory and Applications of Linear Operators and Block Operator Matrices written by Aref Jeribi. This book was released on 2015-07-04. Available in PDF, EPUB and Kindle. Book excerpt: Examining recent mathematical developments in the study of Fredholm operators, spectral theory and block operator matrices, with a rigorous treatment of classical Riesz theory of polynomially-compact operators, this volume covers both abstract and applied developments in the study of spectral theory. These topics are intimately related to the stability of underlying physical systems and play a crucial role in many branches of mathematics as well as numerous interdisciplinary applications. By studying classical Riesz theory of polynomially compact operators in order to establish the existence results of the second kind operator equations, this volume will assist the reader working to describe the spectrum, multiplicities and localization of the eigenvalues of polynomially-compact operators.

Spectral Theory of Linear Operators and Spectral Systems in Banach Algebras

2013-11-11 Mathematics
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Release : 2013-11-11
Genre : Mathematics
Kind : eBook
Book Rating : 889/5 ( reviews)

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Book Synopsis Spectral Theory of Linear Operators and Spectral Systems in Banach Algebras by : Vladimir Müller

Download or read book Spectral Theory of Linear Operators and Spectral Systems in Banach Algebras written by Vladimir Müller. This book was released on 2013-11-11. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to the spectral theory of linear operators on Banach spaces and of elements in Banach algebras. It presents a survey of results concerning various types of spectra, both of single and n-tuples of elements. Typical examples are the one-sided spectra, the approximate point, essential, local and Taylor spectrum, and their variants. Many results appear here for the first time in a monograph.

Perturbation Theory for Linear Operators

2021-07-28 Mathematics
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Release : 2021-07-28
Genre : Mathematics
Kind : eBook
Book Rating : 28X/5 ( reviews)

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Book Synopsis Perturbation Theory for Linear Operators by : Aref Jeribi

Download or read book Perturbation Theory for Linear Operators written by Aref Jeribi. This book was released on 2021-07-28. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the important aspects of spectral theory, in particular, the completeness of generalised eigenvectors, Riesz bases, semigroup theory, families of analytic operators, and Gribov operator acting in the Bargmann space. Recent mathematical developments of perturbed non-self-adjoint operators are discussed with the completeness of the space of generalized eigenvectors, bases on Hilbert and Banach spaces and asymptotic behavior of the eigenvalues of these operators. Most results in the book are motivated by physical problems, such as the perturbation method for sound radiation by a vibrating plate in a light fluid, Gribov operator in Bargmann space and other applications in mathematical physics and mechanics. This book is intended for students, researchers in the field of spectral theory of linear non self-adjoint operators, pure analysts and mathematicians.

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