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...Matrix derivatives cheat sheet kirsty mcnaught october vector manipulation you should be comfortable with these rules they will come in handy when want to simplify an expression before dierentiating all bold capitals are matrices lowercase vectors rule comments ab t btat order is reversed everything transposed a bc c b as above the result scalar and transpose of itself ac multiplication distributive ba not commutative common know by heart presented alongside similar looking help memory this doesn mean always look just like ones examples constant derivative f x df dx bx xtb foramorecomprehensivereference seehttps www math uwaterloo ca hwolkowi matrixcookbook pdf...