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Questions on group theory which concern finite groups.

3 votes
1 answer
306 views

Intersection of maximal subgroups of PSL(2,q)

Let $G := PSL(2,2^r)$, and let $M$ be a maximal subgroup of $G$ isomorphic to $PSL(2,2^s)$. I need to compute $H := M \cap M^g$ for $g \in G-M$. It seems to me that $|H|$ must be $2^r, 2^r\pm 1$ or …
Amin's user avatar
  • 307
0 votes
0 answers
46 views

Generalizing CIT-groups to odd case

A CIT-group is a group such that the centralizer of any involution is a 2-subgroup. The structure of these groups is known from the works of Suzuki and others. Here is my question: has the odd case …
Amin's user avatar
  • 307
7 votes
1 answer
943 views

Groups whose normal subgroups form a chain with respect to inclusion

Let G be a finite group. In general, given two normal subgroups N and K of G, we need not have N < K or K < N. The easiest example is the Klein 4-group V4 and its subgroups of order 2. So assume that …
Amin's user avatar
  • 307