Matrix Derivatives: What's up with all those transposes ?

Sometimes you meet a function with vector parameters on the street and you need to take its derivative. This video will help you figure out how!

[@johnyou9039]

The only practical resource I was able to find on the internet that could explain why the derivative of a matrix matrix product AB wrt A is B^T. Thanks very much!

[@mohamadadhikasuryahaidar7652]

How? can i see your work?

[@osamahasan3288]

excellent content and presentation, well done Mr. David, thanks.

[@AJ-et3vf]

great video. thank you

[@diodin8587]

It seems easy to get mistake when computing these derivatives.

[@Pepegrillomates]

Last matrix index multiplication should be Ctj not Cjt

[@stem5737]

It doesnt matter, its symmetric, so Ctj = Cjt, it doesnt matter in which order you take the derivatives