Proper noun
Hankel (plural Hankels)
A surname from German.
The Bessel function of the second kind then can be thought to naturally appear as the imaginary part of the Hankel functions. Source: Internet
Hankel doesn't mention the author of the theorem. Source: Internet
See also the subsection on Hankel functions below. Source: Internet
Stokes set the theorem as a question on the 1854 Smith's Prize exam, which led to the result bearing his name, even though it was actually first published by Hermann Hankel in 1861. Source: Internet
The Hankel functions are used to express outward- and inward-propagating cylindrical wave solutions of the cylindrical wave equation, respectively (or vice versa, depending on the sign convention for the frequency ). Source: Internet
The importance of Hankel functions of the first and second kind lies more in theoretical development rather than in application. Source: Internet