Higher order terms in the saddle point approximation
- 1 January 1967
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE
- Vol. 55 (8) , 1496-1497
- https://doi.org/10.1109/PROC.1967.5863
Abstract
An integral of the type which commonly occurs in radiation theory is evaluated by the method of steepest descent to optain a well-known asymptotic expansion. The coefficients of the first three terms of this expansion are given in terms of functions and derivatives of functions which appear in the integrand; the coefficient of the third term does not appear to have been given previously.Keywords
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