User ndkrempel

ndkrempel

Member for 13 years, 4 months
Last seen this week

nick.kun.org.uk
London, UK

20 Answers

Score Activity Newest

29 votes

Accepted

Hard Cube Puzzle

answered Jan 19, 2011 at 21:03

16 votes

Non-split extensions of $GL_n(F_q)$ by $F_q^n$ ?

answered Jan 13, 2011 at 15:35

15 votes

Signatures on the infinite symmetric group

answered Feb 4, 2011 at 23:22

11 votes

Accepted

Irreducible representation flipping two elements

answered Mar 8, 2011 at 13:34

11 votes

Integers in a triangle, and differences

answered Dec 1, 2010 at 21:10

11 votes

Is there any way to check whether a group is residually solvable?

answered Dec 8, 2010 at 13:09

11 votes

Why are this operator's primes the Sophie Germain primes?

answered Dec 8, 2010 at 13:37

11 votes

How many finite simple groups of order $p+1$?

answered Dec 8, 2010 at 13:58

10 votes

Does any research mathematics involve solving functional equations?

answered Jan 27, 2011 at 14:23

9 votes

Superfluous definitions

answered Feb 13, 2011 at 23:28

5 votes

How many elements does it take to normally generate a group?

answered Feb 14, 2011 at 0:41

5 votes

Can a problem be simultaneously polynomial time and undecidable?

answered Dec 2, 2010 at 9:21

4 votes

does this group have a name?

answered Dec 3, 2010 at 1:38

4 votes

A set for which it is hard to determine whether or not it is countable.

answered Mar 22, 2011 at 3:06

3 votes

Isomorphism of semidirect products

answered Feb 5, 2011 at 13:31

2 votes

Semi-simple matrices over fields of finite characteristic

answered Jan 13, 2011 at 15:48

2 votes

Accepted

Sphere packing in a sphere

answered Jan 18, 2011 at 18:16

1 vote

Accepted

Rank of sum of Galois conjugates of a matrix

answered Feb 25, 2011 at 20:33

0 votes

Can the I-fold direct product be free?

answered Dec 10, 2010 at 11:03

Stack Exchange Network

20 Answers

Hard Cube Puzzle

Non-split extensions of $GL_n(F_q)$ by $F_q^n$ ?

Signatures on the infinite symmetric group

Irreducible representation flipping two elements

Integers in a triangle, and differences

Is there any way to check whether a group is residually solvable?

Why are this operator's primes the Sophie Germain primes?

How many finite simple groups of order $p+1$?

Does any research mathematics involve solving functional equations?

More open problems

Superfluous definitions

How many elements does it take to normally generate a group?

Can a problem be simultaneously polynomial time and undecidable?

does this group have a name?

A set for which it is hard to determine whether or not it is countable.

Isomorphism of semidirect products

Semi-simple matrices over fields of finite characteristic

Sphere packing in a sphere

Rank of sum of Galois conjugates of a matrix

Can the I-fold direct product be free?