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Expansions of the Poiseuille and the irregular Coulomb functions

Published online by Cambridge University Press:  24 October 2008

A. S. Meligy
A. S. Meligy
Affiliation:
Institute for Theoretical PhysicsUniversity of Copenhagen, Denmark
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Abstract

An expansion of the Whittaker function Mk, m(z) in terms of functions of the same kind is obtained. It generalizes previous results and is used to derive expansions of the second Whittaker function Wk,m (z) in terms of the M functions for the cases m = 0 and ½. The case m = 0 provides expansions for the Poiseuille and the exponential integral functions. The case m = ½ provides an expansion for the irregular Coulomb wave function having angular momentum zero in terms of the regular Coulomb functions.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 57 , Issue 4 , October 1961 , pp. 782 - 789
Copyright
Copyright © Cambridge Philosophical Society 1961

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References

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