The Theorems of Asgeirsson and Howard

Fritz John
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Fritz John: New York University, Courant Institute of Mathematical Sciences

Chapter Chapter V in Plane Waves and Spherical Means, 1981, pp 91-108 from Springer

Abstract: 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 (5.1) F ( x ) = ∑ i , k = 1 n a i k X i X k = r 2 $$F(x) = \sum\limits_{i,k = 1}^n {{a_{ik}}} {X_i}{X_k} = {r^2}$$ .

Keywords: Wave Equation; Plane Wave; Order Differential Equation; Chapter Versus; Spherical Average (search for similar items in EconPapers)
Date: 1981
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DOI: 10.1007/978-1-4613-9453-2_6

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