Several years ago as an exercise, I was able to work through the derivation of thethe Teukolsky equation but have since lost my notes. Has anyone else gone through the derivation, and if so, could you give me a sort of complete idiot's guide to going through the steps? It's been quite some time since I worked through the details. At some point I'd like to do the seperation of variables and look at some of the papers on perturbation theory. Many thanks in advance.