User Tom De Medts

37 votes

2 answers

2k views

Order-increasing bijection from arbitrary groups to cyclic groups

asked Aug 7, 2012 at 9:03

24 votes

2 answers

1k views

Nilpotency of a group by looking at orders of elements

asked Feb 10, 2011 at 20:02

18 votes

4 answers

2k views

For which rings $R$ is $\mathrm{SL}_n(R)$ generated by transvections?

asked Mar 28, 2011 at 19:18

15 votes

3 answers

4k views

Connectedness of the linear algebraic group SO_n

asked Jun 5, 2012 at 15:07

13 votes

2 answers

794 views

Groups with triple system of self-normalizing subgroups

asked Jun 24, 2011 at 8:41

12 votes

1 answer

920 views

Non-isomorphic two-transitive permutation groups with isomorphic point stabilizers

asked Feb 16, 2011 at 10:16

12 votes

1 answer

1k views

Divisibility and factorization in rings that are not integral domains

asked Jul 11, 2012 at 20:12

9 votes

2 answers

448 views

Embedding $\mathrm{PGL}(n,q^h)$ in $\mathrm{PGL}(nh,q)$

asked Apr 28, 2015 at 14:30

7 votes

2 answers

1k views

Recovering n from sigma(n)/n

asked Feb 23, 2011 at 9:56

6 votes

0 answers

236 views

Group homomorphism from $\mathrm{GL}_p$ to $\mathrm{SL}_p$ in characteristic $p$

asked Jun 23, 2023 at 13:59

5 votes

1 answer

479 views

Unipotent radical of minimal parabolic subgroup of a unitary group over an arbitrary field

asked Nov 3, 2015 at 15:29

5 votes

3 answers

1k views

adjoint of multiplication operator in a commutative algebra

asked Aug 25, 2011 at 12:05

4 votes

1 answer

446 views

Finding groups of odd order without non-cyclic nilpotent quotients

asked Mar 10, 2011 at 11:32

3 votes

1 answer

303 views

ABA-product of matrices and length of chains of principal inner ideals

asked Apr 27, 2011 at 11:15

3 votes

0 answers

94 views

Projective limit of copies of same group w.r.t. some fixed endomorphism

asked May 25, 2021 at 16:09

3 votes

2 answers

927 views

Skew fields inside quaternion division algebras

asked Feb 4, 2013 at 15:49

1 vote

2 answers

229 views

Invertibility of all left multiplication maps in non-unital rings

asked Apr 28, 2016 at 10:47

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17 Questions

Order-increasing bijection from arbitrary groups to cyclic groups

Nilpotency of a group by looking at orders of elements

For which rings $R$ is $\mathrm{SL}_n(R)$ generated by transvections?

Connectedness of the linear algebraic group SO_n

Groups with triple system of self-normalizing subgroups

Non-isomorphic two-transitive permutation groups with isomorphic point stabilizers

Divisibility and factorization in rings that are not integral domains

Embedding $\mathrm{PGL}(n,q^h)$ in $\mathrm{PGL}(nh,q)$

Recovering n from sigma(n)/n

Group homomorphism from $\mathrm{GL}_p$ to $\mathrm{SL}_p$ in characteristic $p$

Unipotent radical of minimal parabolic subgroup of a unitary group over an arbitrary field

adjoint of multiplication operator in a commutative algebra

Finding groups of odd order without non-cyclic nilpotent quotients

ABA-product of matrices and length of chains of principal inner ideals

Projective limit of copies of same group w.r.t. some fixed endomorphism

Skew fields inside quaternion division algebras

Invertibility of all left multiplication maps in non-unital rings