Hiya. That's funny because it's exactly what caused us to write this article. Jeremy and I were working on an automatic differentiation tool and couldn't find

Hiya. That's funny because it's exactly what caused us to write this article. Jeremy and I were working on an automatic differentiation tool and couldn't find any description of the appropriate matrix calculus that explained the steps. Everything is just providing the solution without the intervening steps. We decided to write it down so we never have to figure out the notation again. haha