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On a paper by Copson and Ferrar

Published online by Cambridge University Press:  20 January 2009

A. Erdélyi
A. Erdélyi
Affiliation:
BruennMay 5th, 1938.
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Concerning your paper written in collaboration with Professor Copson, I found the expansion of

for small values of λ in the following manner: The elementary substitution tan ½φ = sin θ/(et + cos θ)yields

i.e. your equation (5.11).

Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 6 , Issue 1 , May 1939 , pp. 11
Copyright
Copyright © Edinburgh Mathematical Society 1939

References

1 Proc. Edinburgh Math. Soc. (2), 6 (1938), 159–168.Google Scholar