Ben Derrett's user avatar
Ben Derrett's user avatar
Ben Derrett's user avatar
Ben Derrett
  • Member for 13 years, 5 months
  • Last seen more than a month ago
13 votes
Accepted

What happens when the order of two finite subgroups are relatively prime?

13 votes
Accepted

If $f:\mathbb{R}\to\mathbb{R}$ is a left continuous function can the set of discontinuous points of $f$ have positive Lebesgue measure?

10 votes

Tail sum for expectation

10 votes
Accepted

What is a rigorous way to prove that this graph is non-planar?

10 votes

Maximum of *Absolute Value* of a Random Walk

9 votes

What is the distribution of the position of the maximum of a Brownian bridge?

8 votes

Find all integers $k>2$ such that $5\equiv k \bmod k^2$

7 votes
Accepted

An inequality about binomial distribution

7 votes

Trigonometric equality: $\frac{1 + \sin A - \cos A}{1 + \sin A + \cos A} = \tan \frac{A}{2}$

5 votes

Proving that a graph of a certain size is Hamiltonian

5 votes

If the sequence $(a_n b_n)$ converges and $a_n \to 0$, when does $(b_n)$ converge too?

5 votes

Convergence of a kind of difference quotient

5 votes
Accepted

How do we justify certain steps in the solution to gambler's ruin?

5 votes
Accepted

Finding an example of a discrete-time strict local martingale.

5 votes

Continuity of a function that maps a point to the closest point on a compact convex set

5 votes
Accepted

When are stable continuous time Markov chains Feller? Always?

4 votes
Accepted

Distribution of stochastic integral in small time

4 votes
Accepted

Brownian motion interesting question

4 votes

Set of measure zero

4 votes
Accepted

Question on proof of Hoeffding identity

4 votes
Accepted

Uniform convergence of a sequence of functions defined by an integral

3 votes
Accepted

Integral of the positive part of a Brownian motion

3 votes
Accepted

Two martingales whose distributions agree for each time have the same overall distribution

2 votes

Two different ways of constructing a continuous time Markov chain from discrete time one

2 votes
Accepted

Law of Large numbers using Brownian limit

2 votes
Accepted

Decomposing $Y=U_1+U_2$ so that $\operatorname{Cov}(U_1,X\mid Z)=0$ and $\operatorname{Cov}(U_2,X\mid Z)=\operatorname{Cov}(U_2,X)$

2 votes

Independent increments M-W

2 votes
Accepted

How to evaluate the integral $\int_a^b{\int_0^{2\pi}{\sqrt{y^2(\cos^2{\theta}-1)+1}}\mathrm{d}\theta}\mathrm{d}y$

2 votes
Accepted

Convergence of empirical distribution

2 votes

How to show that $f=0$ a.e. on $[0,1]\times [0,1]$.