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23 votes
2 answers
967 views

Solvable groups that are linear over $\mathbb{C}$ but not over $\mathbb{Q}$?

Let $\Gamma$ be a finitely generated finitely presented virtually solvable group. Assume that there exists an injective representation $\Gamma \to \operatorname{GL}_n(\mathbb{C})$. Is it true that ...
 V. Rogov's user avatar
  • 1,170
3 votes
1 answer
176 views

Example of a supersolvable Lie group/algebra whose nilradical does not have a complement

What is an example of a real solvable simply-connected Lie group $G$ whose nilradical does not have a complement (that is, $G$ is not a semidirect product of the nilradical and another subgroup)? Is ...
Guest7819's user avatar
1 vote
0 answers
172 views

Is every connected solvable group Borel?

Is every connected solvable algebraic group a Borel subgroup of a reductive group? If a counterexample exists, I would ideally like it to be over $\Bbb C$.
Avi Steiner's user avatar
  • 3,079