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Kei

The Imaginary Part of

\begin{displaymath}
e^{-\nu\pi i/2}K_\nu(xe^{\pi i/4})=\mathop{\rm ker}\nolimits _\nu(x)+i\mathop{\rm kei}\nolimits _\nu(x).
\end{displaymath}

See also Bei, Ber, Ker, Kelvin Functions


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 Eric W. Weisstein
1999-05-26