The problem reads: "the function e^[(z/2)(z-1/z)] is the generating function for the bessel functions of the first kind of order n, Jn(s). a) clarify the singluarities of the function." I am wondering what is meant by clarifiying the singluarities. This is a term that I do not know, nor can find anywhere on the internet. He might have made this up. Any help would be greatly appreciated.