The Numerical Range And The Core Of Hilbert Space Operators Microform
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The Numerical Range And The Core Of Hilbert Space Operators Microform
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Author : Ching-Nam Hung
language : en
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
Release Date : 2004
The Numerical Range And The Core Of Hilbert Space Operators Microform written by Ching-Nam Hung and has been published by Library and Archives Canada = Bibliothèque et Archives Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The main object of this thesis is to study the numerical range of Hilbert-space operators. In 1973, T. Ando examined the geometric and algebraic properties of operators and developed a structure theory. In continuation of his work, there has been much progress, especially in the study of the core of a numerical contraction in terms of dilation theory and representation theory. In the first half of this thesis, explicit expressions for the minimum and the maximum of the core of a numerical contraction are studied. The expressions for these extremals are given as strongly convergent non-commutative operator series in terms of the given numerical contraction and its adjoint. This part of the thesis serves as a complement to T. Ando's theorem, in which we find that the operator series provides an efficient mechanism for writing a numerical contraction in terms of dilations and representations. The main tool employed is the theory of Schur complements of positive semi-definite operator matrices. Further discussions on the classical Catalan problem and another related combinatorial problem are also presented. In the second half of this thesis, matrices whose numerical ranges are the closed unit disc are investigated, and the structural expressions of those matrices are studied. As a result, matrices having elliptical discs as numerical range are found to possess the property that the foci of the disc are their eigenvalues. The structure theory obtained by T. Ando, especially the representation of numerical contractions, is essential in proving these results. Finally, the structural expressions of matrices with numerical range equal to the closed unit disc are used to provide an alternative proof for P.Y. Wu's theorem concerning the norms of matrices.
Perturbation Theory For Linear Operators
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Author : Tosio Kato
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Perturbation Theory For Linear Operators written by Tosio Kato and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Mathematics categories.
Tensor Spaces And Numerical Tensor Calculus
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Author : Wolfgang Hackbusch
language : en
Publisher: Springer Nature
Release Date : 2019-12-16
Tensor Spaces And Numerical Tensor Calculus written by Wolfgang Hackbusch and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-16 with Mathematics categories.
Special numerical techniques are already needed to deal with n × n matrices for large n. Tensor data are of size n × n ×...× n=nd, where nd exceeds the computer memory by far. They appear for problems of high spatial dimensions. Since standard methods fail, a particular tensor calculus is needed to treat such problems. This monograph describes the methods by which tensors can be practically treated and shows how numerical operations can be performed. Applications include problems from quantum chemistry, approximation of multivariate functions, solution of partial differential equations, for example with stochastic coefficients, and more. In addition to containing corrections of the unavoidable misprints, this revised second edition includes new parts ranging from single additional statements to new subchapters. The book is mainly addressed to numerical mathematicians and researchers working with high-dimensional data. It also touches problems related to Geometric Algebra.
Signal Processing For Communications
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Author : Paolo Prandoni
language : en
Publisher: Collection Savoir suisse
Release Date : 2008-06-17
Signal Processing For Communications written by Paolo Prandoni and has been published by Collection Savoir suisse this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-06-17 with Signal processing categories.
With a novel, less classical approach to the subject, the authors have written a book with the conviction that signal processing should be taught to be fun. The treatment is therefore less focused on the mathematics and more on the conceptual aspects, the idea being to allow the readers to think about the subject at a higher conceptual level, thus building the foundations for more advanced topics. The book remains an engineering text, with the goal of helping students solve real-world problems. In this vein, the last chapter pulls together the individual topics as discussed throughout the book into an in-depth look at the development of an end-to-end communication system, namely, a modem for communicating digital information over an analog channel.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1969
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Aeronautics categories.
Numerical Ranges Of Hilbert Space Operators
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Author : Hwa-Long Gau
language : en
Publisher: Cambridge University Press
Release Date : 2021-08-05
Numerical Ranges Of Hilbert Space Operators written by Hwa-Long Gau and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-05 with Mathematics categories.
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.
Mathematical Analysis I
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Author : Vladimir A. Zorich
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-01-22
Mathematical Analysis I written by Vladimir A. Zorich and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-01-22 with Mathematics categories.
This work by Zorich on Mathematical Analysis constitutes a thorough first course in real analysis, leading from the most elementary facts about real numbers to such advanced topics as differential forms on manifolds, asymptotic methods, Fourier, Laplace, and Legendre transforms, and elliptic functions.
Broadband Dielectric Spectroscopy
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Author : Friedrich Kremer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Broadband Dielectric Spectroscopy written by Friedrich Kremer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
Both an introductory course to broadband dielectric spectroscopy and a monograph describing recent dielectric contributions to current topics, this book is the first to cover the topic and has been hotly awaited by the scientific community.
Electromagnetic Noise And Quantum Optical Measurements
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Author : Hermann A. Haus
language : en
Publisher: Springer Science & Business Media
Release Date : 2000-09-04
Electromagnetic Noise And Quantum Optical Measurements written by Hermann A. Haus and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-09-04 with Science categories.
From the reviews: "Haus’ book provides numerous insights on topics of wide importance, and contains much material not available elsewhere in book form. [...] an indispensable resource for those working in quantum optics or electronics." Optics & Photonics News
Introduction To Singularities And Deformations
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Author : Gert-Martin Greuel
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-02-23
Introduction To Singularities And Deformations written by Gert-Martin Greuel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-02-23 with Mathematics categories.
Singularity theory is a young, rapidly-growing topic with connections to algebraic geometry, complex analysis, commutative algebra, representations theory, Lie groups theory and topology, and many applications in the natural and technical sciences. This book presents the basic singularity theory of analytic spaces, including local deformation theory and the theory of plane curve singularities. It includes complete proofs.