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verret

Auckland, New Zealand

Researcher in Graph and Group Theory

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26
Pair of short exact sequences of groups
mathoverflow.net

19
Is there anything significant about GAP's SmallGroup(512,2045)?
mathoverflow.net

17
Are there infinitely many insipid numbers?
mathoverflow.net

13
Is there a neat way to see that $C_3$ is not a quotient of $S_n$?
math.stackexchange.com

11
On automorphisms of groups which extend as automorphisms to every larger group
math.stackexchange.com

10
Highly symmetric 6-regular graph with 20 vertices
mathoverflow.net

10
Fantastic properties of Z/2Z
mathoverflow.net

10
Permuting products of subgroups
mathoverflow.net

10
Permuting products of subgroups
math.stackexchange.com

10
Groups of derangements: what is known about subgroups of a symmetric group $S_{n}$ that contain only derangements (plus the identity)?
math.stackexchange.com

9
Let $G$ be a group of order $16$ with an element $g$ of order $4$. Prove that the subgroup of $G$ generated by $g^2$ is normal in $G$.
math.stackexchange.com

9
Subgroup ranks of the symmetric group
mathoverflow.net

9
Groups with "unique" elements of high order
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9
Characteristic subgroups of $p$-groups
mathoverflow.net

8
When Cayley graphs of the symmetric group wrt generating sets of transpositions are isomorphic?
mathoverflow.net

8
Which pairs of groups are quotients of some group by isomorphic subgroups?
math.stackexchange.com

8
Are there only finitely many distinct cubic walk-regular graphs that are neither vertex-transitive nor distance-regular?
mathoverflow.net

8
Population of P people, where each person knows K others, how many people mutually know each other
mathoverflow.net

7
Regular graph of order 50, degree 7 and Automorphism group of order 288000. How to check if it is Cayley
mathoverflow.net

7
Condition(s) for the full autormophism group $\operatorname{Aut}(C(G, S))$ of the Cayley graph of $G$ to be isomorphic to $G$
mathoverflow.net

7
Index of subgroups in a finite solvable group, with trivial Frattini subgroup (Exercise 3B.12 from Finite Group Theory, by M. Isaacs)
math.stackexchange.com

7
Lower frattini subgroup
mathoverflow.net

7
Group which can be written as a union of proper normal subgroups
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6
Cubic Cayley (undirected) graphs
mathoverflow.net

6
For a subgroup $H$ of a finite group $G$ , when does $\lvert \operatorname{Aut}(H)\rvert$ divide $\lvert \operatorname{Aut}(G)\rvert$?
math.stackexchange.com

6
Generator sets of a subgroup of $S_n$ with $O(n)$ total support - do they always exist ?
mathoverflow.net

6
Can $1\ne H\cap H^g\lhd H$ happen if $G$ is a primitive permutation group with stabiliser $H$?
mathoverflow.net

6
Sylow Subgroups and Conjugation
math.stackexchange.com

6
Centralizer sizes in groups and subgroups
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5
Reference request: a list of (small) finite simple groups
math.stackexchange.com

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