Mathematics
Bjørn Kjos-Hanssen's user avatar
Bjørn Kjos-Hanssen's user avatar
Bjørn Kjos-Hanssen's user avatar
Bjørn Kjos-Hanssen
  • Member for 10 years, 10 months
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98 Answers

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45 votes

Intuition for random variable being $\sigma$-algebra measurable?

10 votes

Is $\ln(\ln(n))$ irrational for any integer $n>1$?

9 votes
Accepted

If $\log_35=a$ and $\log_54=b$, what is $\log_{60}70$?

8 votes

Derivation for hypergeometric distribution formula and comparsion with Bernoulli formula

7 votes

What mathematics cannot be reduced to pigeonhole?

6 votes
Accepted

How Can The Following Language Possibly Be Regular?

5 votes
Accepted

Infinite partition of $\mathbb N$ by infinite subsets

4 votes

Could someone explain rough path theory? More specifically, what is the higher ordered "area process" and what information is it giving us?

4 votes

Where to go for groups after Fraleigh

3 votes
Accepted

Optimization: show that $\min \sum_{i \in I}\min f_i(y_i) = \min \sum_{i \in I}f_i(y_i)$

3 votes
Accepted

Proving nonexistence of membership loops using Foundation only

3 votes

Bizarre question given to student at learning center

3 votes

What is the intution behind the ping-pong lemma?

3 votes

Definition of fixed points?

3 votes

On differentiating $F(x)=\ln(2x)$

3 votes

Sufficient Evidence that a Process is a Poisson Process

3 votes
Accepted

Question about the XOR function on two binary strings

3 votes

Does every irrational number contain "$666$" in its decimal expansion?

2 votes

Why are we using combination in probability question when the objects are identical?

2 votes
Accepted

Does $\mathbb P [ Y = 1 | X = x] \ge 1/2 \iff f_{X|Y} (x,1) \ge f_{X|Y} (x,-1)$ hold?

2 votes

Ito-Doeblin Formula (a step involved in the derivation)

2 votes
Accepted

How to compute the Laplace transform of a normally distributed density function?

2 votes
Accepted

What is a minimal set of rules that determine the usual order on $\Bbb{N}$ given that $1 \lt p_1 \lt p_2 \lt \dots$?

2 votes

Distribution of $\sin(X) *\cos(Y)$ where $X,Y$ are iid r.v., uniformly distributed on $[0, 2 \pi]$

2 votes

Moving from one Coupling to another

2 votes

for any Banach space $X,$ $C(L \times Q, X) $ is isometric to $C(L \times K, X)$ and so $C(Q,C(L,X))$ is isometric with $C(K,C(L,X))$.

2 votes
Accepted

Does the relation algebra have a sole sufficient operator?

2 votes

PDF and CDF of $\min\{X_1,X_2,X_3,X_4\}$ for $(X_k)$ i.i.d. with PDF $f(x)=3(1-x)^2$ on $(0,1)$

2 votes
Accepted

Conditional probability combining discrete and continuous variables

2 votes

Converting boolean expressions to polynomials in $\mathbb{Z}_2$: Does it yield a simple way to simplify boolean expressions?

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