The Real Part of

where is a Modified Bessel Function of the Second Kind.

**References**

Abramowitz, M. and Stegun, C. A. (Eds.). ``Kelvin Functions.''
§9.9 in *Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.*
New York: Dover, pp. 379-381, 1972.

© 1996-9

1999-05-26