User Alex B.

123 votes

18 answers

14k views

How do you decide whether a question in abstract algebra is worth studying?

asked Sep 24, 2010 at 6:17

45 votes

1 answer

5k views

Square roots of elements in a finite group and representation theory

asked Oct 18, 2010 at 14:44

35 votes

6 answers

5k views

Character-free proof that Frobenius kernel is a normal subgroup?

asked Apr 27, 2011 at 9:52

21 votes

3 answers

2k views

Number of n-th roots of elements in a finite group and higher Frobenius-Schur indicators

asked Oct 18, 2010 at 15:13

17 votes

0 answers

1k views

Special values of Artin L-functions

asked Oct 7, 2010 at 3:01

16 votes

2 answers

2k views

Groups with all normal subgroups characteristic

asked Jan 1, 2011 at 15:38

14 votes

2 answers

1k views

Class groups in dihedral extensions - some sort of Spiegelungssatz?

asked Aug 17, 2011 at 5:28

12 votes

3 answers

2k views

Sylow subgroups of projective general linear groups

asked Feb 9, 2012 at 17:40

11 votes

3 answers

1k views

Congruence subgroups as abstract groups

asked Aug 3, 2011 at 6:10

8 votes

0 answers

337 views

Passing to torsion of an exact sequence

asked Mar 30, 2021 at 20:22

8 votes

1 answer

1k views

Galois descent for K-groups (or for étale cohomology groups)

asked May 5, 2011 at 3:31

6 votes

0 answers

163 views

Generalisation of the Witt–Berman induction theorem

asked May 8, 2019 at 14:12

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12 Questions

How do you decide whether a question in abstract algebra is worth studying?

Square roots of elements in a finite group and representation theory

Character-free proof that Frobenius kernel is a normal subgroup?

Number of n-th roots of elements in a finite group and higher Frobenius-Schur indicators

Special values of Artin L-functions

Groups with all normal subgroups characteristic

Class groups in dihedral extensions - some sort of Spiegelungssatz?

Sylow subgroups of projective general linear groups

Congruence subgroups as abstract groups

Passing to torsion of an exact sequence

Galois descent for K-groups (or for étale cohomology groups)

Generalisation of the Witt–Berman induction theorem