The lambda function defined by Jahnke and Emden (1945) is

(1) | |||

(2) |

where is a Bessel Function of the First Kind and is the Jinc Function.

A two-variable lambda function defined by Gradshteyn and Ryzhik (1979) is

(3) |

**References**

Gradshteyn, I. S. and Ryzhik, I. M.
*Tables of Integrals, Series, and Products, 5th ed.* San Diego, CA: Academic Press, p. 1079, 1979.

Jahnke, E. and Emde, F. *Tables of Functions with Formulae and Curves, 4th ed.* New York: Dover, 1945.

© 1996-9

1999-05-26