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econ86
  • Member for 5 years, 8 months
  • Last seen more than a month ago
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question
3
Studying continuity of $f(x,y)=\frac{x+y}{x-y}$
Oct 10, 2019
question
3
$\sigma$-algebra generated by a stochastic process
Apr 8, 2020
question
3
Showing a simple example of uniform convergence in probability
Feb 3, 2022
question
2
Product of convergent sequences in ${\mathbb{R}}^n$
Oct 2, 2019
question
1
If $E(Xi'Xi)$ is invertible and $\Sigma>0$, is $E(Xi'\Sigma^{-1}Xi)$ invertible?
Feb 11, 2019
question
1
Why is the constraint $\mbox{rank} (X) \leq r$ non-convex?
Jun 13, 2019
question
1
Smallest eigenvalues of $(A-B)'(A-B)$ if $B$ is rank-deficient
Aug 19, 2019
question
1
How to show $f(x_1,x_2)=\begin{pmatrix} e^{x_1}+e^{x_2} \\ e^{x_1}-e^{x_2} \end{pmatrix}$ is surjective?
Oct 14, 2019
question
1
Clarification on Wikipedia's entry on Variational Bayesian methods
Oct 6, 2021
question
1
If $Z = X+Y$, when do $F_Z(z) = F_X(z)$?
Dec 1, 2022
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7
Distribution of $\frac{X}{X+Y}$ if $X,Y$ are independent Beta random variables
6
Suppose $X$ follows a normal mixture. In which cases is $X$ itself normally distributed?