Mikko Korhonen
  • Member for 11 years, 3 months
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7 answers
162 votes
14k views
65 bookmarks
Does $\mathrm{Aut}(\mathrm{Aut}(...\mathrm{Aut}(G)...))$ stabilize?
18 answers
113 votes
12k views
97 bookmarks
How do you decide whether a question in abstract algebra is worth studying?
2 answers
109 votes
10k views
89 bookmarks
How would you solve this tantalizing Halmos problem?
2 answers
106 votes
13k views
67 bookmarks
Does every non-empty set admit a group structure (in ZF)?
16 answers
74 votes
4k views
27 bookmarks
Important open problems that have already been reduced to a finite but infeasible amount of computation
4 answers
65 votes
8k views
53 bookmarks
explicit big linearly independent sets
10 answers
65 votes
5k views
47 bookmarks
Why are characters so well-behaved?
1 answers
57 votes
13k views
32 bookmarks
Is the Green-Tao theorem true for primes within a given arithmetic progression?
1 answers
53 votes
4k views
29 bookmarks
A condition that implies commutativity
0 answers
49 votes
895 views
17 bookmarks
Class function counting solutions of equation in finite group: when is it a virtual character?
1 answers
48 votes
8k views
21 bookmarks
Order of an automorphism of a finite group
9 answers
47 votes
7k views
46 bookmarks
Nice proofs of the Poincaré–Birkhoff–Witt theorem
4 answers
43 votes
7k views
18 bookmarks
Verifying the correctness of a Sudoku solution
10 answers
41 votes
9k views
44 bookmarks
The finite subgroups of SL(2,C)
7 answers
40 votes
14k views
23 bookmarks
How might M.C. Escher have designed his patterns?
7 answers
35 votes
4k views
19 bookmarks
Applications of Frobenius theorem and conjecture
2 answers
33 votes
4k views
20 bookmarks
Smallest permutation representation of a finite group?
2 answers
32 votes
1k views
13 bookmarks
Is every finite group the outer automorphism group of a finite group?
4 answers
32 votes
3k views
8 bookmarks
Computer calculations in a paper
3 answers
30 votes
3k views
15 bookmarks
Order of products of elements in symmetric groups
0 answers
29 votes
942 views
6 bookmarks
Follow-up to Steinberg's problem (12) in his 1966 ICM talk?
5 answers
28 votes
4k views
13 bookmarks
Generating a finite group from elements in each conjugacy class
2 answers
27 votes
3k views
8 bookmarks
Number of finite simple groups of given order is at most 2 - is a classification-free proof possible?
2 answers
27 votes
6k views
16 bookmarks
Elementary proof of Nakayama's lemma?
2 answers
24 votes
1k views
8 bookmarks
Subgroups of finite solvable groups with paradoxical properties
2 answers
23 votes
2k views
8 bookmarks
Realizing groups as commutator subgroups
10 answers
23 votes
4k views
16 bookmarks
Pair of curves joining opposite corners of a square must intersect---proof?
0 answers
22 votes
961 views
8 bookmarks
Given a lattice L with n elements, are there finite groups H < G such that L $\cong$ the lattice of subgroups between H and G?
5 answers
22 votes
3k views
8 bookmarks
Is Cauchy induction used for proofs other than for AM–GM?
3 answers
20 votes
850 views
3 bookmarks
What did Frobenius prove about $M_{12}$?