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The Theorems of Asgeirsson and Howard

  • Fritz John

Abstract

For the derivation of the theorems in this chapter it is convenient to introduce the integrals of a function f(x) in n-space over a general ellipsoid
$$F(x) = \sum\limits_{i,k = 1}^n {{a_{ik}}} {X_i}{X_k} = {r^2}$$
(5.1)
.

Keywords

Wave Equation Plane Wave Order Differential Equation Chapter Versus Spherical Average 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • Fritz John
    • 1
  1. 1.Courant Institute of Mathematical SciencesNew York UniversityNew YorkUSA

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