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###### Exercise Problem Set 12

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158
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6
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18 Jan '22

Hello,
For Problem Set 12, Question 2:
![week12q2.JPG](https://oknoname-crm1.s3.amazonaws.com/spi…

###### Lab 12 Problem 1

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90
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1
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18 Jan '22

Hi,
1) Could you please give me more details on how we obtain this result : (edit : figured it o…

###### Lab 9 Problem 3

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58
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1
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18 Jan '22

Hello,
in the solutions it says that inserting H = QLQ^T into w = (H + muI)^-1 H w* leads to the a…

###### Problem set 3, compute the gradient for a cost function

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55
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1
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18 Jan '22

Hello,
I don’t see that the provided solution gives us the behavior that we would expect. When w…

###### Lab 10 Problem 1 point 3 : theory FSGM and gradient

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122
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5
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17 Jan '22

In lab 10 (problem 1, point 3) I don't understand how the solution of of FSGM problem was derived, …

###### lab 13 gradients of Loss wrt to w and u

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77
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2
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17 Jan '22

Hello I can't figure out how to find the same gradients derived in lab 13, So i figured it would be…

###### Lab 12 Problem 1 Compute U, S efficiently

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54
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1
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14 Jan '22

1) possible typo In the solution
"Let \( v_i \), i = 1, ..., N, denote the columns of V" instead …

###### Lab 12, theory questions - problem 2

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67
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10 Jan '22

Let X be symmetric matrix and X=USV^T its SVD decomposition. If X is positive semi-definite, SVD is…

###### Few generalities about SVD

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138
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2
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10 Jan '22

Hi ! Sorry if I am asking questions with obvious answers, but I went through some linear algebra co…

###### Lab10_Pb1_Minimizer Solution

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119
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5
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10 Jan '22

Hello,
I don't really get how do we find delta* (cf picture) from the equality of the loss we der…

###### Lab07 Coordinate Descent (Ascent) for SVM

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80
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1
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9 Jan '22

Hi,
After checking the solution of Lab07 and the lecture slide, I still feel puzzled about Coord…

###### Lab 7 problem 2

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114
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7 Jan '22

Hello,
For the first question of problem 2, would it be possible to have detailed passage from …

###### SGD Lab 7

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60
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1
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7 Jan '22

Hello,
I do not understand why for the update of the weights, gamma is divided by #iters +1?
…

###### Lab 9 Problem 3

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166
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3
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5 Jan '22

Hello,
I can't seem to understand the calculation done in the first question of the exercise. I …

###### Lab 3 relative error plot

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59
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5 Jan '22

Hello,
I am a bit confused for the problem set 3, for the theory exercices part 2) cost function…

###### Lab 3 small typo

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45
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3 Jan '22

Hello, for the solution of the lab 3 shouldn't be the x_n^T be a vector so in bold?
![Screenshot 2…

###### Lab 13 Solution possible typo

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60
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30 Dec '21

Hi,
In lab 13, when defining class MatrixFactorizationPredictor(Predictor), we have :
self.m…

###### Lab 13 solutions

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30 Dec '21

Hi,
I just realized that the solutions to lab 13 have not been published yet. Thanks for making …

###### lab 10

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13 Dec '21

Hello, I have a question regarding Problem 1. It is a simple question but I don't see how the Cauch…

###### Ex7 Question 1.2

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50
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2 Dec '21

In the solution for this question, why do we multiply the gradient with *num_examples* since we jus…