###### pca empirical covariance
Lectures · 124 · 2 · 24 Jan '21
hello, I was wondering why in the empirical formula we don't have 1/N-1 instead of 1/N for covar…
###### Is GAN a zero-sum game?
Lectures · 260 · 5 · 15 Jan '21
There's no doubt that GAN is a two-player game, but is it zero-sum? Based on the definition of a z…
###### Computational cost for projected gradient descent
Lectures · 125 · 2 · 13 Jan '21
What is the Computational cost for projected gradient descent?
###### Mistake SVD annotated lecture
Lectures · 94 · 1 · 12 Jan '21
I believe the annotation at the end of the lecture is wrong. I believe it says U <--- EVD(X) wherea…
###### Convexity and NN
Lectures · 72 · 2 · 12 Jan '21
Hello, I was wondering why we don't use a convex activation (whose compositions would also be co…
###### Regulatization and over-parametrized problem
Lectures · 74 · 1 · 12 Jan '21
Hi! How does regularization solve this over-parametrized problem? With regularization, the number …
###### K-means
Lectures · 119 · 2 · 12 Jan '21
what is the complexity of k means? Is it N-P hard or O(N.K.D) ?
###### Truncated SVD
Lectures · 103 · 2 · 12 Jan '21
Hi! I'm a little confused about the dimensions of the matrices. 1) The Uk matrix has size D*K, t…
###### Proof of the SVD lemma
Lectures · 109 · 2 · 12 Jan '21
Hello ! I have some troubles understanding the following statement in the proof: ![ML.jpg](https:…
###### Convexity and unique minimum when matrices are the parameter
Lectures · 78 · 1 · 12 Jan '21
Hi, How does the concept of convexity and conditions unique minimum extend to functions that dep…
###### randomized smoothing
Lectures · 67 · 1 · 12 Jan '21
Hello, I don't understand this explanation. So we have a point x that has expected value of clas…
###### MAP and maximum likelihood criterion
Lectures · 213 · 7 · 12 Jan '21
Hello everyone, When reading the lecture note of 5a classification, I found it says that "To …
###### Linear separability for linear regression.
Lectures · 326 · 7 · 12 Jan '21
Dear TAs, I am struggling to understand why linear separability matters for linear regression. I…
###### how do we know link function
Lectures · 93 · 3 · 12 Jan '21
Hi, In parameter estimation since we don't know eta, how do we know the link function g needed to…
###### Computaional cost for grid search
Lectures · 79 · 2 · 11 Jan '21
I am having trouble computing the computational cost for grid search. Can someone please help with …
###### gan objective vs individual losses
Lectures · 59 · 1 · 11 Jan '21
hello, I don't understand the link between the objective function and the individual losses. We …
###### GAN algorithm
Lectures · 212 · 4 · 11 Jan '21
Hello, For the GAN algorithm, there are two different versions, one in the original slides and on…
###### GAN NE and algorithm
Lectures · 164 · 4 · 11 Jan '21
Hi, I was looking at the GANS lecture for the NE definition and was wondering if it is local sho…
###### Duality: when is dual better than primal? (unclear)
Lectures · 61 · 1 · 11 Jan '21
Hi! I'm still confused as to which cases are better with dual or with primal. The formulation o…
###### K means
Lectures · 85 · 3 · 11 Jan '21
In lecture 10B, it was mentioned that K means clustering is NP-hard. Can you please explain what do…