drhab

Amsterdam, Netherlands

Wiskundeliefhebber (=Dutch for 'mathlover').

Next to that I am fond of compliments (aren't you?), so have reasons enough to like this place.

The ultimate one is:

'...Well done, good and faithful servant!...' (Matt. 25:21)

I hope to hear that once.

My hardest opponent is 'vanitas' in all its meanings. The fact that I used a Latin word allready indicates that.

top accounts reputation activity subscriptions

Is it possible that a left coset of $H$ contains more than one right coset of $H$?

group-theory infinite-groups asked Sep 2, 2014 at 9:31

math.stackexchange.com

23 votes

How to construct the coproduct of two (non-commutative) rings

ring-theory category-theory asked Jan 3, 2014 at 14:05

math.stackexchange.com

18 votes

What is the definition of a commutative diagram?

category-theory asked Jan 10, 2014 at 9:14

math.stackexchange.com

17 votes

Is function $f:\mathbb C-\{0\}\rightarrow\mathbb C$ prescribed by $z\rightarrow \large \frac{1}{z}$ by definition discontinuous at $0$?

functions soft-question definition asked Jan 1, 2015 at 15:39

math.stackexchange.com

16 votes

In a deck of cards, do a queen and a non-queen have equal chances of being the card that follows the first queen?

probability combinatorics card-games asked Mar 8 at 9:48

math.stackexchange.com

15 votes

Is there a suitable definition in categories for a closed continuous function in topology?

general-topology category-theory asked Jul 23, 2013 at 10:45

math.stackexchange.com

12 votes

Can a verbum deponens go along with an accusativus?

classical-latin verbs accusativus deponent-verbs plinius-minor asked Feb 24, 2016 at 11:00

latin.stackexchange.com

11 votes

Did it ever happen that a Christian died simply because he had no food at his disposal?

exegesis asked Oct 2, 2013 at 10:55

christianity.stackexchange.com

11 votes

Has by well-foundedness every non-empty class an $R$-minimal element? Also if axiom REG is not assumed?

set-theory asked Aug 14, 2015 at 12:19

mathoverflow.net

11 votes

What is necessary and/or sufficient for polynomials to provide isomorphic quotient rings?

abstract-algebra polynomials ring-theory commutative-algebra asked Jul 16, 2014 at 20:29

math.stackexchange.com

Top Answers

We roll a six-sided die ten times. What is the probability that the total of all ten rolls is divisible by 6?

math.stackexchange.com

Sum of two independent binomial variables

math.stackexchange.com

A normal subgroup is the union of conjugacy classes.

math.stackexchange.com

Probability that 3 points in a plane form a triangle

math.stackexchange.com

Inverse image of composite function

math.stackexchange.com

How to compute the sum of random variables of geometric distribution

math.stackexchange.com

Why is infinity multiplied by zero considered zero here?

math.stackexchange.com

What does "identically distributed" mean?

math.stackexchange.com

How does $-\sqrt {\frac{{2 - \sqrt 2 }}{{2 + \sqrt 2 }}} $ simplify to $1 - \sqrt 2 $?

math.stackexchange.com

4-digit password with unique digits not in ascending or descending order

math.stackexchange.com

Is diameter of a set a measure?

math.stackexchange.com

The real line, and finite complement topology is not a hausdorff

math.stackexchange.com

Integer solutions using PIE

math.stackexchange.com

Combinatorics: number of ways to seat 5 children in a line with rules

math.stackexchange.com

Is the measure of the sum equal to the sum of the measures?

math.stackexchange.com

Is the empty set Lebesgue measurable?

math.stackexchange.com

$A \in B$ vs. $A \subset B$ for proofs

math.stackexchange.com

What's the probability that a given permutation has exactly $k$ fixed points.

math.stackexchange.com

Examples of a concept that is dual to itself

math.stackexchange.com

Confusing probability question

math.stackexchange.com

Why is ring addition commutative?

math.stackexchange.com

Count the possible ways to seat people at a round table

math.stackexchange.com

Collection of all finite sets

math.stackexchange.com

Why is there a preference to use the cumulative distribution function to characterise a random variable instead of the probability density function?

math.stackexchange.com

$f$ a real, continuous function, is it measurable?

math.stackexchange.com

An unbiased coin is tossed six times in a row. Which statement describing the last two coin tosses has the highest probability of being correct?

math.stackexchange.com

Product of measurable functions is measurable

math.stackexchange.com

Calculating the number of possible paths through some squares

math.stackexchange.com

I was asked to prove the Principle of Cauchy Induction

math.stackexchange.com

Three white and one red ball probability

math.stackexchange.com