Preface
1 Fourier Series
Piecewise Continuous Functions
Fourier Cosine Series
Examples
Fourier Sine Series
Examples
Fourier Series
Examples
Adaptations to Other Intervals
2 Convergence of Fourier Series
One-Sided Derivatives
A Property of Fourier Coefficients
Two Lemmas
A Fourier Theorem
A Related Fourier Theorem
Examples
Convergence on Other Intervals
A Lemma
Absolute and Uniform Convergence of Fourier Series
The Gibbs Phenomenon
Differentiation of Fourier Series
Integration of Fourier Series
3 Partial Differential Equations of Physics
Linear Boundary Value Problems
One-Dimensional Heat Equation
Related Equations
Laplacian in Cylindrical and Spherical Coordinates
Derivations
Boundary Conditions
Duhamel's Principle
A Vibrating String
Vibrations of Bars and Membranes
General Solution of a Wave Equation
Types of Equations and Boundary Conditions
4 The Fourier Method
Linear Operators
Principle of Superposition
Examples
Eigenvalues and Eigenfunctions
A Temperature Problem
A Vibrating String Problem
Historical Development
5 Boundary Value Problems
A Slab with Faces at Prescribed Temperatures
Related Temperature Problems
Temperatures in a Sphere
A Slab with Internally Generated Heat
Steady Temperatures in Rectangular Coordinates
Steady Temperatures in Cylindrical Coordinates
A String with Prescribed Initial Conditions
Resonance
An Elastic Bar
Double Fourier Series
Periodic Boundary Conditions
6 Fourier Integrals and Applications
The Fourier Integral Formula
Dirichlet's Integral
Two Lemmas
A Fourier Integral Theorem
The Cosine and Sine Integrals
Some Eigenvalue Problems on Unbounded Intervals
More on Superposition of Solutions
Steady Temperatures in a Semi-Infinite Strip
Temperatures in a Semi-Infinite Solid
Temperatures in an Unlimited Medium
7 Orthonormal Sets
Inner Products and Orthonormal Sets
Examples
Generalized Fourier Series
Examples
Best Approximation in the Mean
Bessel's Inequality and Parseval's Equation
Applications to Fourier Series
8 Sturm-Liouville Problems and Applications
Regular Sturm-Liouville Problems
Modifications
Orthogonal Eigenfunctions and Real Eigenvalues
Real-Valued Eigenfunctions
Nonnegative Eigenvalues
Methods of Solution
Examples of Eigenfunction Expansions
ATemperature Problem in Rectangular Coordinates
Steady Temperatures
Other Coordinates
A Modification of the Method
Another Modification
A Vertically Hung Elastic Bar
9 Bessel Functions and Applications
The Gamma Function
Bessel Functions J,(x)
Solutions Whenv
Recurrence Relations
Bessel's Integral Form
Some Consequences of the Integral Forms
The Zeros of Jn(x)
Zeros of Related Functions
Orthogonal Sets of Bessel Functions
Proof of the Theorems
Iwo Lemmas
Fourier-Bessel Series
Examples
Temperatures in a Long Cylinder
A Temperature Problem in Shrunken Fittings
Internally Generated Heat
Temperatures in a Long Cylindrical Wedge
Vibration of a Circular Membrane
10 Legendre Polynomials and Applications
Solutions of Legendre's Equation
Legendre Polynomials
Rodrigues'Formula
Laplace's Integral Form
Some Consequences of the Integral Form
Orthogonality of Legendre Polynomials
Normalized Legendre Polynomials
Legendre Series
The Eigenfunctions Pa(cose)
Dirichlet Problems in Spherical Regions
Steady Temperatures in a Hemisphere
11 Verification of Solutions and Uniqueness
Abel's Test for Uniform Convergence
Verification of Solution of Temperature Problem
Uniqueness of Solutions of the Heat Equation
Verification of Solution of Vibrating String Problem
Uniqueness of Solutions of the Wave Equation
Appendixes
Bibliography
Some Fourier Series Expansions
Solutions of Some Regular Sturm-Liouville Problems
Some Fo

本书介绍了傅里叶级数及其在工程和物理学偏微分方程边界值问题中的应用。本书是为已经完成了常微分方程第一课的学生设计的，证明了高等微积分中偶尔需要的更微妙的结果。