I noticed that there are functions for first-order, second-order, and N-order Bessel functions (Y0, Y1, Yn) defined in the standard Go library (Y0). I can't seem to determine the practical application of these mathematical functions that would make them so important as to include in the standard library.
Can someone help me out? It seems like Bessels (which I haven't heard of before) relate to describing [graduated?] shapes of quadratic curves, but I'm unsure why this is of special significance to general development.