Plane Waves and Spherical Means Applied to Partial Differential Equations

Courier Corporation, 1 juil. 2004 - 172 pages
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Elementary and self-contained, this heterogeneous collection of results on partial differential equations employs certain elementary identities for plane and spherical integrals of an arbitrary function, showing how a variety of results on fairly general differential equations follow from those identities. The first chapter deals with the decomposition of arbitrary functions into functions of the type of plane waves. Succeeding chapters introduce the first application of the Radon transformation and examine the solution of the initial value problem for homogeneous hyperbolic equations with constant coefficients and the problem of determining a function from its integrals over spheres of radius 1. 1955 edition.

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Decomposition of an Arbitrary Function into Plane Waves
The Initial Value Problem for Hyperbolic Homogeneous Equations with Constant Coefficients
The Fundamental Solution of a Linear Elliptic Differential Equation with Analytic Coefficients
Identities for Spherical Means
The Theorems of Asgeirsson and Howard
Determination of a Function from Its Integrals over Spheres of a Fixed Radius
Differentiability Properties of Solutions of Elliptic Systems
Regularity Properties for Integrals of Solutions over Timelike Lines
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