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Solutions of the Differential Equation u‴+λ2zu+(α−1)λ2u=0

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This paper deals with the solutions of the differential equation u‴+λ2 zu+(α−1)λ2 u=0, in which λ is a complex parameter of large absolute value and α is an arbitrary constant, real or complex. After a discussion of the structure of the solutions of the differential equation, an integral representation of the solution is given, from which the series solutions and their asymptotic representations are derived. A third independent solution is needed for the special case when α−1 is a positive integer, and two derivations for this are given. Finally, a comparison is made with the results obtained by R. E. Langer.
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Document Type: Research Article

Affiliations: Queens College, CUNY

Publication date: December 1, 1976

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