Extensions of Positive Definite Functions

Extensions of Positive Definite Functions PDF Author: Palle Jorgensen
Publisher: Springer
ISBN: 331939780X
Category : Mathematics
Languages : en
Pages : 255

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Book Description
This monograph deals with the mathematics of extending given partial data-sets obtained from experiments; Experimentalists frequently gather spectral data when the observed data is limited, e.g., by the precision of instruments; or by other limiting external factors. Here the limited information is a restriction, and the extensions take the form of full positive definite function on some prescribed group. It is therefore both an art and a science to produce solid conclusions from restricted or limited data. While the theory of is important in many areas of pure and applied mathematics, it is difficult for students and for the novice to the field, to find accessible presentations which cover all relevant points of view, as well as stressing common ideas and interconnections. We have aimed at filling this gap, and we have stressed hands-on-examples.

Extensions of Positive Definite Functions

Extensions of Positive Definite Functions PDF Author: Palle Jorgensen
Publisher: Springer
ISBN: 331939780X
Category : Mathematics
Languages : en
Pages : 255

Get Book Here

Book Description
This monograph deals with the mathematics of extending given partial data-sets obtained from experiments; Experimentalists frequently gather spectral data when the observed data is limited, e.g., by the precision of instruments; or by other limiting external factors. Here the limited information is a restriction, and the extensions take the form of full positive definite function on some prescribed group. It is therefore both an art and a science to produce solid conclusions from restricted or limited data. While the theory of is important in many areas of pure and applied mathematics, it is difficult for students and for the novice to the field, to find accessible presentations which cover all relevant points of view, as well as stressing common ideas and interconnections. We have aimed at filling this gap, and we have stressed hands-on-examples.

Extensions of Positive-Definite Functions

Extensions of Positive-Definite Functions PDF Author: John R. McMullen
Publisher: American Mathematical Soc.
ISBN: 0821818171
Category : Mathematics
Languages : en
Pages : 79

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Book Description


Extension of Positive-Definite Distributions and Maximum Entropy

Extension of Positive-Definite Distributions and Maximum Entropy PDF Author: Jean-Pierre Gabardo
Publisher: American Mathematical Soc.
ISBN: 0821825518
Category : Mathematics
Languages : en
Pages : 111

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Book Description
In this work, the maximum entropy method is used to solve the extension problem associated with a positive-definite function, or distribution, defined on an interval of the real line. Garbardo computes explicitly the entropy maximizers corresponding to various logarithmic integrals depending on a complex parameter and investigates the relation to the problem of uniqueness of the extension. These results are based on a generalization, in both the discrete and continuous cases, of Burg's maximum entropy theorem.

Mathematical Analysis and Applications

Mathematical Analysis and Applications PDF Author: Michael Ruzhansky
Publisher: John Wiley & Sons
ISBN: 1119414334
Category : Mathematics
Languages : en
Pages : 1021

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Book Description
An authoritative text that presents the current problems, theories, and applications of mathematical analysis research Mathematical Analysis and Applications: Selected Topics offers the theories, methods, and applications of a variety of targeted topics including: operator theory, approximation theory, fixed point theory, stability theory, minimization problems, many-body wave scattering problems, Basel problem, Corona problem, inequalities, generalized normed spaces, variations of functions and sequences, analytic generalizations of the Catalan, Fuss, and Fuss–Catalan Numbers, asymptotically developable functions, convex functions, Gaussian processes, image analysis, and spectral analysis and spectral synthesis. The authors—a noted team of international researchers in the field— highlight the basic developments for each topic presented and explore the most recent advances made in their area of study. The text is presented in such a way that enables the reader to follow subsequent studies in a burgeoning field of research. This important text: Presents a wide-range of important topics having current research importance and interdisciplinary applications such as game theory, image processing, creation of materials with a desired refraction coefficient, etc. Contains chapters written by a group of esteemed researchers in mathematical analysis Includes problems and research questions in order to enhance understanding of the information provided Offers references that help readers advance to further study Written for researchers, graduate students, educators, and practitioners with an interest in mathematical analysis, Mathematical Analysis and Applications: Selected Topics includes the most recent research from a range of mathematical fields.

Commutative Harmonic Analysis II

Commutative Harmonic Analysis II PDF Author: V.P. Havin
Publisher: Springer Science & Business Media
ISBN: 3642589464
Category : Mathematics
Languages : en
Pages : 335

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Book Description
Classical harmonic analysis is an important part of modern physics and mathematics, comparable in its significance with calculus. Created in the 18th and 19th centuries as a distinct mathematical discipline it continued to develop, conquering new unexpected areas and producing impressive applications to a multitude of problems. It is widely understood that the explanation of this miraculous power stems from group theoretic ideas underlying practically everything in harmonic analysis. This book is an unusual combination of the general and abstract group theoretic approach with a wealth of very concrete topics attractive to everybody interested in mathematics. Mathematical literature on harmonic analysis abounds in books of more or less abstract or concrete kind, but the lucky combination as in this volume can hardly be found.

Recent Advances in Matrix and Operator Theory

Recent Advances in Matrix and Operator Theory PDF Author: Joseph A. Ball
Publisher: Springer Science & Business Media
ISBN: 3764385391
Category : Mathematics
Languages : en
Pages : 340

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Book Description
This volume comprises the proceedings of the International Workshop on Operator Theory and Its Applications held at the University of Connecticut in July 2005.

Harmonic Analysis

Harmonic Analysis PDF Author: Palle E.T. Jorgensen
Publisher: American Mathematical Soc.
ISBN: 1470448807
Category : Mathematics
Languages : en
Pages : 281

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Book Description
There is a recent and increasing interest in harmonic analysis of non-smooth geometries. Real-world examples where these types of geometry appear include large computer networks, relationships in datasets, and fractal structures such as those found in crystalline substances, light scattering, and other natural phenomena where dynamical systems are present. Notions of harmonic analysis focus on transforms and expansions and involve dual variables. In this book on smooth and non-smooth harmonic analysis, the notion of dual variables will be adapted to fractals. In addition to harmonic analysis via Fourier duality, the author also covers multiresolution wavelet approaches as well as a third tool, namely, L2 spaces derived from appropriate Gaussian processes. The book is based on a series of ten lectures delivered in June 2018 at a CBMS conference held at Iowa State University.

Harmonic Analysis of Operators on Hilbert Space

Harmonic Analysis of Operators on Hilbert Space PDF Author: Béla Sz Nagy
Publisher: Springer Science & Business Media
ISBN: 1441960937
Category : Mathematics
Languages : en
Pages : 481

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Book Description
The existence of unitary dilations makes it possible to study arbitrary contractions on a Hilbert space using the tools of harmonic analysis. The first edition of this book was an account of the progress done in this direction in 1950-70. Since then, this work has influenced many other areas of mathematics, most notably interpolation theory and control theory. This second edition, in addition to revising and amending the original text, focuses on further developments of the theory, including the study of two operator classes: operators whose powers do not converge strongly to zero, and operators whose functional calculus (as introduced in Chapter III) is not injective. For both of these classes, a wealth of material on structure, classification and invariant subspaces is included in Chapters IX and X. Several chapters conclude with a sketch of other developments related with (and developing) the material of the first edition.

Expansions in Eigenfunctions of Selfadjoint Operators

Expansions in Eigenfunctions of Selfadjoint Operators PDF Author: I͡Uriĭ Makarovich Berezanskiĭ
Publisher: American Mathematical Soc.
ISBN: 9780821886496
Category : Boundary value problems
Languages : en
Pages : 824

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Book Description


Positive Definite and Definitizable Functions

Positive Definite and Definitizable Functions PDF Author: Zoltán Sasvári
Publisher: Wiley-VCH
ISBN:
Category : Mathematics
Languages : en
Pages : 216

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Book Description