Complex numbers, Wirtinger derivatives and 2D inverse kinematics - eviltoast
Recently, I’ve been thinking about inverse kinematics for a certain project which I might be doing somewhere in the future. Around the same time, a friend of mine asked me something about complex derivatives. In the end I decided to write this post to clear my own thoughts and to hopefully explain something useful :)

lisyarus explains the complex derivatives so well, it also becomes clear why conformal mapping interesting in complex analysis.