Lecture 4 - Automatic Differentiation

[@oraz.]

This is the best autodiff lesson

[@soumitrapandit3444]

This was amazing. Thank you so much!

[@jieshen3441]

Great work, Tianqi!

[@howardsmith4128]

Great lesson thanks!

[@Poti221]

Very nice explanation!

[@nitinnilesh]

17:07 Can someone please explain how the number of multiplication is n(n-2) ?

[@mohamedabdelkarimibrahimse1132]

in the slide it is n(n-1) which i think it is the true answer cuz you only remove the element you take derivative to it so remains (n-1) multiplied n times to get all n derivitives

[@nitinnilesh]

Yes, even I had calculated n(n-1) multiplications. But when the instructor also mentioned that it is n(n-2), I got confused. Thanks for the response.

[@shihaowu88]

To multiply (n-1) elements, we only need to do (n-2) multiplications 😂

[@yingqinchen9225]

@@shihaowu88 At first I also thought it was n(n-1)...it is really a brain teaser...

[@tiendungnt]

to multiple n variables we need do n -1 product opertations, so for n-1 variables we need n -2 operations.

[@edwardshi8390]

Superb

[@mananshah2140]

Beautifully explained!

[@dionysusegeriow3017]

This is the best course ever!

[@deoabhijit5935]

Super

[@alirezaolama5806]

Nice lecture! Can anyone provide some resources to read more about these materials, please? Especially, reverse mode AD by extending computational graph?

[@zhiqiqin1286]

great!

[@AnEnderNon]

omg tysm

[@sarracen1a]

太棒了，拯救了我的期末大作业😭