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Zim
  • Member for 2 years, 2 months
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4 votes
Accepted

Translation of a set: a set plus a vector $\{0,2\}+1=\{1,3\}$?

4 votes
Accepted

Prove a series of a subsequence converges.

4 votes

Is $ \arctan(f(x))\leq f(x)$ whenever $|f(x)|<1\ \ \forall x\in\mathbb{R} $?

4 votes
Accepted

Explaining the stability of a numerical scheme through functional analysis

3 votes

Applications of SGD outside learning tasks

3 votes
Accepted

Why do we need the notion of a compact set to define a game?

3 votes
Accepted

Solutions of two minimisation problems

3 votes

On a coupled fixed point

3 votes

How is the subgradient method different from gradient descent in practice?

3 votes
Accepted

Nelder Mead Search Vs conjugae gradient decent

2 votes
Accepted

convex function of n convex function

2 votes

How to choose an initial value for a multidimensional equation while using Newton-Raphson method to solve it?

2 votes

Gradient of $\mbox{dist}\left(x, D \right)^2:= \left\| x - P_{D}(x)\right\|_2^2$, where $P_{D}(x)$ is a projection operator

2 votes

Projection of closed convex sets

2 votes

What does it mean for something to be linear?

2 votes
Accepted

Normal cone of sphere

2 votes

Can the Proximal Operator Have Discontinuity?

2 votes
Accepted

Extending bounded functions to unbounded ones

2 votes

Iteratively Reweighted Least Squares: termination criterion

2 votes

How can one show that $argmin_{a,b}\:\left\{\:\sum \:\left|y-\left(a+bx\right)\right|\right\}$ can lack a unique solution

2 votes
Accepted

Rescaling a function to equalize impact of input variables

2 votes

Is the following convex: $f(x) = \frac{\|\mathbf{Ax}+\mathbf{b}\|^2}{\mathbf{m^Tx}+n}$ over a convex set

2 votes
Accepted

conditioning of the monomial basis

2 votes
Accepted

Conjugate of a function involving *inf*

1 vote
Accepted

If $x^{-} = \textrm{argmin}_x f(x) $, $x^{+} = \textrm{argmin}_x g(x) $, and $x^{-} \neq x^{+} $, then can we state the following:

1 vote

is there example that inequality $\sup\{\inf\{f(x,y) : x \in X\}: y \in Y\} \le \inf\{\sup\{f(x,y) : y \in Y\}: x \in X\}$ be strict?

1 vote
Accepted

Function $f$ with $|f|$ is Lebesgue integrable but $f$ isn't locally Lebesgue integrable

1 vote

show $B_2$ is convex

1 vote
Accepted

How do abstract convexity spaces generalise convex sets?

1 vote

Why the error using backward Euler is less than using Crank--Nicolson?