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3 votes
2 answers
221 views

Number of involutions in finite reductive groups

Let $G$ be a connected split reductive group over $\mathbb{Z}$. Let $n$ be a positive integer. Let $i_n(q)$ be the number of elements of $G(\mathbb{F}_q)$ satisfying $x^n=1$. Question: Is there a &...
Dr. Evil's user avatar
  • 2,751
2 votes
0 answers
154 views

Reference request - obtaining finite simple groups from algebraic groups

I'm looking for references for the following statements, which I believe are true: Let $G$ be a simply connected simple linear algebraic group over a finite field $k$ of cardinality $q\ge 4$. Let $Z\...
stupid_question_bot's user avatar
3 votes
1 answer
237 views

invariant subspaces of general linear groups for finite fields

Let $K$ be a finite field, let $n\ge 1$ be an integer and let $G=\mathrm{GL}(n,K)$ be acting linearly on a finite dimensional $K$-vector space $V$. Although $G$ is a reductive group, it is not ...
Jérémy Blanc's user avatar
0 votes
0 answers
147 views

Groups implementable by finite field

I'm interested in finding all groups for which the group operation (and inverse map) may be implemented using finite field arithmetic. I've done some searching and have come across "algebraic groups",...
user135066's user avatar