All Questions
3
questions
11
votes
2
answers
652
views
$\mathbb Z/p\mathbb Z=A\cup(A-A)$?
$\newcommand{\Z}{\mathbb Z/p\mathbb Z}$
Can one partition a group of prime order as $A\cup(A-A)$ where $A$ is a subset of the group, $A-A$ is the set of all differences $a'-a''$ with $a',a''\in A$, ...
- 22.6k
1
vote
1
answer
448
views
The Symmetry of Steiner System S(5,8,24)
The group of automorphisms of S(5,8,24), M_{24}, is 5-transitive.
Other than Symmetric groups are there any other 5-transitive groups?
If not, would it be correct to say S(5,8,24) is the most ...
- 25
0
votes
1
answer
111
views
All $2$-designs arising from the action of the affine linear group on the field of prime order
Let $p$ be a prime and $\mathbb{Z}_p$ denote as usual the field of order $p$. Let $AL(p)$ be the affine linear group $\{x\mapsto ax+b \;|\; a\in \mathbb{Z}_p\setminus \{0\}, b\in\mathbb{Z}_p\}$. For a ...
- 3,708