Hankel Transform

http://en.wikipedia.org/wiki/Hankel_transform

In mathematics, the Hankel transform expresses any given function f(r) as the weighted sum of an infinite number of Bessel functions of the first kind Jν(kr). The Bessel functions in the sum are all of the same order ν, but differ in a scaling factor k along the r-axis. The necessary coefficient Fν of each Bessel function in the sum, as a function of the scaling factor k constitutes the transformed function.

Layered media에서  analytic solution을 구하려니 자꾸 Hankel transform 이 나와서.. 빡침.

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