Thank you so much for bringing this wonderful course! I have a question: Regarding 3:22, what if matrix A has identical column vectors? ex: when: A = [ 1 1 3 3 ] a1 = [ 1 3 ] then: inv(A) * a1 = [ 1 1 ] ... ? I thought result here might have two flags(1) in this case, but it conflicts with the fact that the result should be an identity matrix. (I know this A doesn't have inverse A, but I'd like to ask about general case here)
@AIcia_Solid2 жыл бұрын
Thank you so much for watching and comment!🎉 As you mentioned, the matrix A in your comment doesn't have the inverse, so naive computation may lead you to some incorrect results. There are several wars to define the inverse-like matrices for the general case. For example, Moore-Penrose inverse is one example. (In the caes of our A, we use the singular value decomposition to construct the inverse.) If you are interested in, please search with the term Moore-Penrose inverse!🎉
@ikura182 жыл бұрын
@@AIcia_Solid Thank you so much for the detailed answer! Will do search with the term !
@AIcia_Solid2 жыл бұрын
Sorry, I haven't noticed that you have supported me!!! Thank you so much!!! I'll try to keep generating valuable videos!!!🔥