About 2018 Q18
exercises · 50 · 1 · 8 Jul
The conclusion from Q19 is the same as our lecture. However, in Q18, I notice the "strongly convex"…
Q19 2020
exercises · 132 · 4 · 7 Jul
Hi, I am confused by the fact that this question is True, standard GD is a first order optimizatio…
Some questions on 2020 exam
exercises · 221 · 5 · 7 Jul
-Q4: How come x^4 is not strongly convex? -Q11: I agree that it satisfies the PL inequality, but…
Some questions on 2018 exam
exercises · 157 · 5 · 7 Jul
-Q3: What is the idea behind this? I fully understand the previous sub questions but I really don't…
Question for Q34 in exam 2020
exercises · 102 · 5 · 7 Jul
Hi, I have a question for the Q34 in exam 2020. I checked out the solution and found that a chan…
Exam 2020 Q26
exercises · 106 · 5 · 7 Jul
Hello, I don't understand how we obtain the second solution. What I did was to add and remove \(…
Q4 2020
exercises · 33 · 1 · 7 Jul
Hello! I was wondering why x^{4} was not strongly convex. My understanding of strongly convex is th…
Q10 2018
exercises · 106 · 7 · 7 Jul
Hey, how can the bound for the L_i=\norm(a_i)^2 be obtained? I tried to apply triangle inequality.…
Q29 2020
exercises · 72 · 2 · 7 Jul
Hi, could you give some approximative steps on how to solve this question? Thank you.
Q24 2019
exercises · 69 · 4 · 7 Jul
Hi, in the second step when calculating the p* shouldn't the norm of grad(f) be squared? Thank yo…
how to determine a function is strongly convex or not
exercises · 66 · 2 · 7 Jul
is there any intuitive understanding about whether a function is strongly convex or not? In exam 20…
Exam 2020: Q2
exercises · 95 · 3 · 7 Jul
Why isn't sin(x) with x between pi and 2pi strongly convex?
Q16 2019
exercises · 91 · 3 · 6 Jul
Hi, why this statement is TRUE? Isn't the bounded set A can be non-convex? Thanks.
2018 Q24
exercises · 67 · 3 · 6 Jul
Hello, I don't understand why the function is convex. The distance is a minimum of a L2 norm, but t…
Q21 exam 2019 and Q21 exam 2020
exercises · 74 · 2 · 6 Jul
Hi, I am having trouble understanding the difference between Q21 in exam 2020 and Q21 in 2019. F…
Q28 2019
exercises · 35 · 1 · 6 Jul
Hi, how can I prove that the norm-2 of A is eps+d? Thank you.
Q16 2018
exercises · 51 · 2 · 6 Jul
Hi, I understand the reason behind the relative ordering of the algorithms, although why is the ca…
Using pencil for open questions
exercises · 37 · 1 · 6 Jul
Hi, apart from the MCQ part, can we use pencil to answer the open questions?
Question for Q22 in the exam 2020
exercises · 43 · 1 · 6 Jul
Hi, I have a question for question 22 in the exam 2020. Why it is true? In my understanding, Sig…
Question for exam 2020 Q4
exercises · 45 · 2 · 6 Jul
Hi, I have a question for Q4 in the exam 2020. How to prove that function D is strictly convex? …