Geoff Robinson's user avatar
Geoff Robinson's user avatar
Geoff Robinson's user avatar
Geoff Robinson
  • Member for 12 years, 11 months
  • Last seen this week
  • United Kingdom
66 votes
Accepted

Why can't a nonabelian group be 75% abelian?

44 votes
Accepted

How large can the smallest generating set of a group $G$ of order $n$ be?

36 votes

Determinant of sum of positive definite matrices

36 votes
Accepted

Properties to have matrices that commute in $\mathrm{GL}_n(\mathbb C)$

30 votes

Groups that do not exist

27 votes

Eigenvalues of nonnegative integer matrices

27 votes
Accepted

Is each squared finite group trivial?

26 votes
Accepted

In what sense is SL(2,q) "very far from abelian"?

26 votes
Accepted

Why is this character expression an integer?

26 votes
Accepted

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

25 votes

On permanents and determinants of finite groups

24 votes

Prominent non-mathematical work of mathematicians

24 votes
Accepted

Number of 2-dimensional irreducible representations of a finite group ?

24 votes
Accepted

How much of character theory can be done without Schur's lemma or the Artin-Wedderburn theorem?

24 votes
Accepted

General bound for the number of subgroups of a finite group

24 votes

Number of involutions in a finite group

24 votes
Accepted

Is applying Feit–Thompson’s theorem for the nonexistence of a simple group of order $1004913$ really a circular argument?

23 votes
Accepted

Atypical use of Sylow?

22 votes

What is the standard 2-generating set of the symmetric group good for?

22 votes
Accepted

Subgroups of GL(2,q)

22 votes

Failure of a basic fact from Representation Theory

22 votes

Proof of CFSG assuming every simple group is two-generated

21 votes

What are the connections between pi and prime numbers?

21 votes
Accepted

On the finite simple groups with an irreducible complex representation of a given dimension

20 votes
Accepted

Does the symmetric group $S_{10}$ factor as a knit product of symmetric subgroups $S_6$ and $S_7$?

20 votes
Accepted

When does $G\times G\times G$ admit a faithful group action on a set of size $|G|$?

20 votes
Accepted

What is prime power of this equation of p?

20 votes

5/8 bound in group theory

19 votes

Characterization of the transfer map in group theory

19 votes
Accepted

For which kinds of group $G$, can we identify a square element efficiently?

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