这些讲义是一个开创性的研究。 基于Riemann, Kirchhoff和Volterra的研究,运用其关于所有正常的双曲型方程组的球面和柱面波的相关理论,阿达马扩展和改进了Volterra的工作。主题包括柯西问题的一般性质,基本公式和基本解,具有奇数独立变量的方程和具有偶数独立变量的方程。
- Front Matter
- BOOK I. GENERAL PROPERTIES OF CAUCHY’S PROBLEM
- I. CAUCHY’S FUNDAMENTAL THEOREM CHARACTERISTICS
- II. DISCUSSION OF CAUCHY’S RESULT
- BOOK II. THE FUNDAMENTAL FORMULA AND THE ELEMENTARY SOLUTION
- I. CLASSIC CASES AND RESULTS
- II. THE FUNDAMENTAL FORMULA
- III. THE ELEMENTARY SOLUTION
- 1. General Remarks
- 2. Solutions with an Algebroid Singularity
- 3. The Case of the Characteristic Conoid.The Elementary Solution
- Additional Note on the Equations of Geodesics
- BOOK III. THE EQUATIONS WITH AN ODD NUMBER OF INDEPENDENT VARIABLES
- I. INTRODUCTION OF A NEW KIND OF IMPROPER INTEGRAL
- 1. Discussion of Preceding Results
- 2. The Finite Part of an Infinite Simple Integral
- 3. The Case of Multiple Integrals
- 4. Some Important Examples
- II. THE INTEGRATION FOR AN ODD NUMBER OF INDEPENDENT VARIABLES
- III. SYNTHESIS OF THE SOLUTION OBTAINED
- IV. APPLICATIONS TO FAMILIAR EQUATIONS
- BOOK IV. THE EQUATIONS WITH AN EVEN NUMBER OF INDEPENDENT VARIABLES AND THE METHOD OF DESCENT
- I. INTEGRATION OF THE EQUATION IN 2m1 VARIABLES
- 1. General Formulæ
- 2. Familiar Examples
- 3. Application to a Discussion of Cauchy’s Problem
- II. OTHER APPLICATIONS OF THE PRINCIPLE OF DESCENT
- 1. Descent from m Even to m Odd
- 2. Properties of the Coefficients in the Elementary Solution
- 3. Treatment of Non-Analytic Equations
- INDEX