Analytic Methods for Partial Differential Equations

G. Evans

ISBN 10: 3540761241 / ISBN 13: 9783540761242

Editore: Springer London Nov 1999, 1999

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This item is printed on demand - it takes 3-4 days longer - Neuware -The subject of partial differential equations holds an exciting place in mathematics. At one extreme the interest lies in the existence and uniqueness of solutions, and the functional analysis of the proofs of these properties. At the other extreme lies the applied mathematical and engineering quest to find useful solutions, either analytically or numerically, to these important equations which can be used in design and construction. The objective of this book is to actually solve equations rather than discuss the theoretical properties of their solutions. The topics are approached practically, without losing track of the underlying mathematical foundations of the subject. The topics covered include the separation of variables, the characteristic method, D'Alembert's method, integral transforms and Green's functions. Numerous exercises are provided as an integral part of the learning process, with solutions provided in a substantial appendix. 316 pp. Englisch. Codice articolo 9783540761242

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Titolo: Analytic Methods for Partial Differential ...

Casa editrice: Springer London Nov 1999

Data di pubblicazione: 1999

Legatura: Taschenbuch

Condizione: Neu

Descrizione articolo

Riassunto:

This is the practical introduction to the analytical approach taken in Volume 2. Based upon courses in partial differential equations over the last two decades, the text covers the classic canonical equations, with the method of separation of variables introduced at an early stage. The characteristic method for first order equations acts as an introduction to the classification of second order quasi-linear problems by characteristics. Attention then moves to different co-ordinate systems, primarily those with cylindrical or spherical symmetry. Hence a discussion of special functions arises quite naturally, and in each case the major properties are derived. The next section deals with the use of integral transforms and extensive methods for inverting them, and concludes with links to the use of Fourier series.

Contenuti:

1. Mathematical Preliminaries.- 1.1 Introduction.- 1.2 Characteristics and Classification.- 1.3 Orthogonal Functions.- 1.4 Sturm-Liouville Boundary Value Problems.- 1.5 Legendre Polynomials.- 1.6 Bessel Functions.- 1.7 Results from Complex Analysis.- 1.8 Generalised Functions and the Delta Function.- 1.8.1 Definition and Properties of a Generalised Function.- 1.8.2 Differentiation Across Discontinuities.- 1.8.3 The Fourier Transform of Generalised Functions.- 1.8.4 Convolution of Generalised Functions.- 1.8.5 The Discrete Representation of the Delta Function.- 2. Separation of the Variables.- 2.1 Introduction.- 2.2 The Wave Equation.- 2.3 The Heat Equation.- 2.4 Laplace’s Equation.- 2.5 Homogeneous and Non-homogeneous Boundary Conditions.- 2.6 Separation of variables in other coordinate systems.- 3. First-order Equations and Hyperbolic Second-order Equations.- 3.1 Introduction.- 3.2 First-order equations.- 3.3 Introduction to d’Alembert’s Method.- 3.4 d’Alembert’s General Solution.- 3.5 Characteristics.- 3.6 Semi-infinite Strings.- 4. Integral Transforms.- 4.1 Introduction.- 4.2 Fourier Integrals.- 4.3 Application to the Heat Equation.- 4.4 Fourier Sine and Cosine Transforms.- 4.5 General Fourier Transforms.- 4.6 Laplace transform.- 4.7 Inverting Laplace Transforms.- 4.8 Standard Transforms.- 4.9 Use of Laplace Transforms to Solve Partial Differential Equations.- 5. Green’s Functions.- 5.1 Introduction.- 5.2 Green’s Functions for the Time-independent Wave Equation.- 5.3 Green’s Function Solution to the Three-dimensional Inhomogeneous Wave Equation.- 5.4 Green’s Function Solutions to the Inhomogeneous Helmholtz and Schrödinger Equations: An Introduction to Scattering Theory.- 5.5 Green’s Function Solution to Maxwell’s Equations and Time-dependent Problems.- 5.6 Green’s Functions and Optics: Kirchhoff Diffraction Theory.- 5.7 Approximation Methods and the Born Series.- 5.8 Green’s Function Solution to the Diffusion Equation.- 5.9 Green’s Function Solution to the Laplace and Poisson Equations.- 5.10 Discussion.- A. Solutions of Exercises.