Skip to main content
David's user avatar
David's user avatar
David's user avatar
David
  • Member for 9 years, 1 month
  • Last seen more than a week ago
11 votes
2 answers
2k views

Proof of Leibniz formula from Laplace expansion

5 votes
2 answers
1k views

Bounding the variance of a sum of independent random variables

5 votes
1 answer
455 views

Deriving the asymptotic distribution of a two-stage estimator

5 votes
1 answer
1k views

Does the proof that the Nested Set Theorem implies the Axiom of Completeness require the Archemedean property?

5 votes
1 answer
155 views

What is the relationship between the following set functions?

5 votes
1 answer
237 views

Extend the Picard Local Existence Theorem using the Arzelà–Ascoli Theorem

4 votes
0 answers
193 views

When are conditional expectations differentiable?

4 votes
0 answers
480 views

Lebesgue measure of a parallelepiped

4 votes
1 answer
2k views

Eigenvalues of a binary matrix

3 votes
1 answer
396 views

Proving equivalent of definitions of measurability

3 votes
2 answers
222 views

Generalization of the chain rule using upper derivatives

3 votes
2 answers
57 views

Does $\lim_{\epsilon \to 0^+} \frac{\int_0^\epsilon f}{\epsilon^{1/q}} = 0$ hold for all $f\in L^p[0,1]$.

2 votes
2 answers
392 views

Imposing non-negativity constraint on a linear regression function

2 votes
5 answers
196 views

Can I prove $2^{-n}$ converges to $0$ without invoking the Axiom of Completeness or the Archimedean property of the reals?

2 votes
0 answers
1k views

Why is this countable union of closed sets closed?

2 votes
1 answer
111 views

Compute the probability of a joint event involving two independent standard normals

2 votes
1 answer
91 views

A question about matrix algebras

1 vote
0 answers
84 views

Decomposing a matrix as the product of rotations

1 vote
0 answers
588 views

Quadratic optimization problem with quadratic equality constraint

1 vote
1 answer
166 views

Almost everywhere differentiability

1 vote
1 answer
40 views

Difficulty with a differentiation of measures proof

1 vote
1 answer
442 views

Riemann integration of a power function

1 vote
1 answer
770 views

Cantor set and ternary expansions

1 vote
0 answers
344 views

Marginal convergence in distribution plus independence imply joint convergence?

1 vote
1 answer
1k views

At which points is the following function continuous?

1 vote
1 answer
366 views

Is $x^\alpha \sin(1/x^\beta)$ an anti-derivative on $[0,1]$?

0 votes
1 answer
120 views

If $\{x_n / n\} \uparrow \infty$, then there exists $\{c_n\}$ such that $\sum_{n=1}^\infty x_nc_n = \infty$ and $\sum_{n=1}^\infty n c_n < \infty$

0 votes
1 answer
165 views

Convergence of the expectation of a ratio of sample means

0 votes
0 answers
48 views

Does a continuous, bounded, lattice-valued correspondence have a continuous least upper bound?

0 votes
0 answers
248 views

The volume of an N-dimensional ball in Euclidean space with radius that grows with N