Lectures on Cauchy's Problem in Linear Partial Differential Equations

Lectures on Cauchy's Problem in Linear Partial Differential Equations PDF Author: Jacques Hadamard
Publisher:
ISBN:
Category : Cauchy problem
Languages : en
Pages : 336

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Book Description

Lectures on Cauchy's Problem in Linear Partial Differential Equations

Lectures on Cauchy's Problem in Linear Partial Differential Equations PDF Author: Jacques Hadamard
Publisher:
ISBN:
Category : Cauchy problem
Languages : en
Pages : 336

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Book Description


The Cauchy Problem

The Cauchy Problem PDF Author: Hector O. Fattorini
Publisher: Cambridge University Press
ISBN: 0521302382
Category : Mathematics
Languages : en
Pages : 664

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Book Description
This volume deals with the Cauchy or initial value problem for linear differential equations. It treats in detail some of the applications of linear space methods to partial differential equations, especially the equations of mathematical physics such as the Maxwell, Schrödinger and Dirac equations. Background material presented in the first chapter makes the book accessible to mathematicians and physicists who are not specialists in this area as well as to graduate students.

Cauchy Problem for Differential Operators with Double Characteristics

Cauchy Problem for Differential Operators with Double Characteristics PDF Author: Tatsuo Nishitani
Publisher: Springer
ISBN: 3319676121
Category : Mathematics
Languages : en
Pages : 215

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Book Description
Combining geometrical and microlocal tools, this monograph gives detailed proofs of many well/ill-posed results related to the Cauchy problem for differential operators with non-effectively hyperbolic double characteristics. Previously scattered over numerous different publications, the results are presented from the viewpoint that the Hamilton map and the geometry of bicharacteristics completely characterizes the well/ill-posedness of the Cauchy problem. A doubly characteristic point of a differential operator P of order m (i.e. one where Pm = dPm = 0) is effectively hyperbolic if the Hamilton map FPm has real non-zero eigen values. When the characteristics are at most double and every double characteristic is effectively hyperbolic, the Cauchy problem for P can be solved for arbitrary lower order terms. If there is a non-effectively hyperbolic characteristic, solvability requires the subprincipal symbol of P to lie between −Pμj and Pμj , where iμj are the positive imaginary eigenvalues of FPm . Moreover, if 0 is an eigenvalue of FPm with corresponding 4 × 4 Jordan block, the spectral structure of FPm is insufficient to determine whether the Cauchy problem is well-posed and the behavior of bicharacteristics near the doubly characteristic manifold plays a crucial role.

Partial Differential Equations

Partial Differential Equations PDF Author: Walter A. Strauss
Publisher: John Wiley & Sons
ISBN: 0470054565
Category : Mathematics
Languages : en
Pages : 467

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Book Description
Our understanding of the fundamental processes of the natural world is based to a large extent on partial differential equations (PDEs). The second edition of Partial Differential Equations provides an introduction to the basic properties of PDEs and the ideas and techniques that have proven useful in analyzing them. It provides the student a broad perspective on the subject, illustrates the incredibly rich variety of phenomena encompassed by it, and imparts a working knowledge of the most important techniques of analysis of the solutions of the equations. In this book mathematical jargon is minimized. Our focus is on the three most classical PDEs: the wave, heat and Laplace equations. Advanced concepts are introduced frequently but with the least possible technicalities. The book is flexibly designed for juniors, seniors or beginning graduate students in science, engineering or mathematics.

Linear Multivariable Control: a Geometric Approach

Linear Multivariable Control: a Geometric Approach PDF Author: W. M. Wonham
Publisher: Springer Science & Business Media
ISBN: 1468400681
Category : Science
Languages : en
Pages : 340

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Book Description
In writing this monograph my aim has been to present a "geometric" approach to the structural synthesis of multivariable control systems that are linear, time-invariant and of finite dynamic order. The book is addressed to graduate students specializing in control, to engineering scientists engaged in control systems research and development, and to mathemati cians with some previous acquaintance with control problems. The present edition of this book is a revision of the preliminary version, published in 1974 as a Springer-Verlag "Lecture Notes" volume; and some of the remarks to follow are repeated from the original preface. The label "geometric" in the title is applied for several reasons. First and obviously, the setting is linear state space and the mathematics chiefly linear algebra in abstract (geometric) style. The basic ideas are the familiar system concepts of controllability and observability, thought of as geometric properties of distinguished state subspaces. Indeed, the geometry was first brought in out of revulsion against the orgy of matrix manipulation which linear control theory mainly consisted of, not so long ago. But secondly and of greater interest, the geometric setting rather quickly suggested new methods of attacking synthesis which have proved to be intuitive and econo mical; they are also easily reduced to matrix arithmetic as soon as you want to compute.

Mathematical Methods For Physicists

Mathematical Methods For Physicists PDF Author: Danilo Babusci
Publisher: World Scientific
ISBN: 9811201595
Category : Science
Languages : en
Pages : 478

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Book Description
The book covers different aspects of mathematical methods for Physics. It is designed for graduate courses but a part of it can also be used by undergraduate students. The leitmotiv of the book is the search for a common mathematical framework for a wide class of apparently disparate physical phenomena. An important role, within this respect, is provided by a nonconventional formulation of special functions and polynomials. The proposed methods simplify the understanding of the relevant technicalities and yield a unifying view to their applications in Physics as well as other branches of science.The chapters are not organized through the mathematical study of specific problems in Physics, rather they are suggested by the formalism itself. For example, it is shown how the matrix formalism is useful to treat ray Optics, atomic systems evolution, QED, QCD and Feynman diagrams. The methods presented here are simple but rigorous. They allow a fairly substantive tool of analysis for a variety of topics and are useful for beginners as well as the more experienced researchers.

Use of a Characteristic Surfaces for Unsymmetrical Supersonic Flow Problems

Use of a Characteristic Surfaces for Unsymmetrical Supersonic Flow Problems PDF Author: Wolfgang E. Moeckel
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 56

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Book Description
Application of the method of characteristics to the linearized three-dimensional equation results in a relatively simple system of difference equations that can be used to compute the supersonic flow past boundaries for which no other linearized solutions are available.

Symmetrization and Stabilization of Solutions of Nonlinear Elliptic Equations

Symmetrization and Stabilization of Solutions of Nonlinear Elliptic Equations PDF Author: Messoud Efendiev
Publisher: Springer
ISBN: 3319984071
Category : Mathematics
Languages : en
Pages : 273

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Book Description
This book deals with a systematic study of a dynamical system approach to investigate the symmetrization and stabilization properties of nonnegative solutions of nonlinear elliptic problems in asymptotically symmetric unbounded domains. The usage of infinite dimensional dynamical systems methods for elliptic problems in unbounded domains as well as finite dimensional reduction of their dynamics requires new ideas and tools. To this end, both a trajectory dynamical systems approach and new Liouville type results for the solutions of some class of elliptic equations are used. The work also uses symmetry and monotonicity results for nonnegative solutions in order to characterize an asymptotic profile of solutions and compares a pure elliptic partial differential equations approach and a dynamical systems approach. The new results obtained will be particularly useful for mathematical biologists.

Some Applications of Functional Analysis in Mathematical Physics

Some Applications of Functional Analysis in Mathematical Physics PDF Author: S. L. Sobolev
Publisher: American Mathematical Soc.
ISBN: 9780821898321
Category : Mathematics
Languages : en
Pages : 300

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Book Description
Special problems of functional analysis Variational methods in mathematical physics The theory of hyperbolic partial differential equations Comments Appendix: Methode nouvelle a resoudre le probleme de Cauchy pour les equations lineaires hyperboliques normales Comments on the appendix Bibliography Index

Introduction to Microwave Imaging

Introduction to Microwave Imaging PDF Author: Natalia K. Nikolova
Publisher: Cambridge University Press
ISBN: 110708556X
Category : Mathematics
Languages : en
Pages : 364

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Book Description
A one-stop tutorial for beginners covering the fundamentals of microwave imaging, including application examples and practical exercises.