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Jul
7
answered Arguing a stationary distribution exists
Jun
15
asked Optimising a piecewise convex function
Jun
11
comment Example of periodic $f\left(x\right)+xg\left(x\right)$, where f is even function and g is periodic
$f(x)=cos(x)$ and $g(x)=sin(x)/x$.
Jun
1
accepted Which of two quantities is greater?
May
30
comment Which of two quantities is greater?
Thanks @Michael. For the comparison of these functions, (say $f$ and $g$), I can simply show $f(0)=g(0)$, the slope of $g$ is more negative than that of $f$ and that $g$ is decreasing throughout $(0,1)$. Is that right or is there a more compact way of doing this?
May
30
comment Which of two quantities is greater?
Hi. I have a follow-up question: I need to show $(x-y)^{((x-y)/(2x-y))}\times (x+y)^{((x)/(2x-y))}>x$. I am not sure how the AM-GM inequality leads to this, as the GM is on the LHS?
May
29
asked Which of two quantities is greater?
May
21
comment Computing expectation of a function of two random variables
@zoli: Yes, there are $N-1$ independent draws and the $N^{th} $ is dependent on the previous draws. Your understanding is right.
May
21
comment Computing expectation of a function of two random variables
@zoli: Why not? I never said within array $X$, the draws are independent. $x_n(\omega)=S_x-\sum_{i=1}^{N-1}x_i$ for all $\omega$.
May
21
comment Computing expectation of a function of two random variables
@zoli: One number in the array. Distribution with finite support on the real line.
May
21
asked Computing expectation of a function of two random variables
May
13
asked Scale-free property of random graphs
Apr
24
comment Continuity of optimisation problem
@calculus: I have solved $F(z)$, the issue is about the continuity of $F(z)$. The solution exhibits a discontinuity at $z=0$. My question is for what classes of optimisation problems will such a discontinuity not be there?
Apr
24
asked Continuity of optimisation problem
Apr
17
awarded  Popular Question
Apr
7
revised Bounding $x^\top Ay/x^\top y$
added 15 characters in body
Apr
7
comment Bounding $x^\top Ay/x^\top y$
@Tryss: By assumption, they are not orthogonal. Clarified.
Apr
7
revised Bounding $x^\top Ay/x^\top y$
edited body
Apr
7
asked Bounding $x^\top Ay/x^\top y$
Apr
5
accepted Is the optimum of this problem unique?