Richard Lyons's user avatar
Richard Lyons's user avatar
Richard Lyons's user avatar
Richard Lyons
  • Member for 7 years, 5 months
  • Last seen this week
44 votes
Accepted

Has anyone catalogued the "first generation" proof of the classification of finite simple groups?

40 votes
Accepted

Known and fixed gaps in the proof of the CFSG

17 votes

Groups that do not exist

16 votes
Accepted

Group with fewer than $p^2$ Sylow p-subgroups

13 votes

Classification of finite subgroups of $\mathrm{SL}_5(\mathbb{C})$

12 votes
Accepted

A finite p-group question: can this happen?

10 votes
Accepted

Symmetric subgroups of simple algebraic groups over finite fields

10 votes

Low-dimensional irreducible 2-modular representations of the symmetric group

9 votes

$S_3 \times 2^2 \cdot PSU_6 (2) \overset ? \subset 2^2 \cdot {}^2 E_6 (2)$

7 votes
Accepted

Condition on $q$ for inclusion $p^{1+2r}\cdot\operatorname{Sp}(2r,p)\leqslant \operatorname{GU}(p^r,q)$

7 votes

A possible characterization of the category of finite $p$-groups

6 votes

Can $1\ne H\cap H^g\lhd H$ happen if $G$ is a primitive permutation group with stabiliser $H$?

6 votes

Non-split Aut(G) $\to$ Out(G)?

6 votes
Accepted

first group cohomology for the standard representation of $S_n$ over $\mathbb{F}_2$

6 votes

Inner wreath product

6 votes

The property of conjugate subgroup

6 votes
Accepted

Does a non-simple perfect group always have a maximal subgroup whose derived subgroup has nontrivial core?

5 votes
Accepted

On the number of involutions in some groups

5 votes
Accepted

Subgroups of finite simple groups $L(q^f)$ of Lie type normalized by $L(q)$

4 votes
Accepted

A lower bound on the number of fixed points of an inner diagonal automorphism of ${^2}{\operatorname{E}_6(q^2)}$

4 votes
Accepted

Element that is in $\phi^{-1}(Z(F (G/F(G)))$

3 votes

Quotient of Pauli group isomorphism

2 votes
Accepted

Twisted root subgroups in twisted Chevalley groups (reference request)

2 votes
Accepted

The property of self-normalizing subgroup

1 vote

Notable mathematics during World War II

1 vote

Automorphism groups of simple groups of Lie type