I am very impressed with the clarity of presentation here. I usually link to The Matrix Cookbook[1] when I need to cite a reference for matrix calculus theorems

I am very impressed with the clarity of presentation here. I usually link to The Matrix Cookbook[1] when I need to cite a reference for matrix calculus theorems but I might reference this instead in the future. I particularly like the section on the vector chain rule (which is very clear) and the section on element-wise operations (which uses novel notation to present many results in a compact form.) [1]: https://www.math.uwaterloo.ca/~hwolkowi/matrixcookbook.pdf https://www.math.uwaterloo.ca/~hwolkowi/matrixcookbook.pdf