Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9518665 | Annales Scientifiques de l'École Normale Supérieure | 2005 | 40 Pages |
Abstract
Let Î0 be a group of finite type and FÎ0âHom(Î0,PGL(Rm)) be the subset of faithful representations for which there exists a properly convex Î0-invariant open subset Ω in P(Rm) such that the quotient Î0\Ω is compact. Koszul has proved in [J.L. Koszul, Déformation des connexions localement plates, Ann. Inst. Fourier 18 (1968) 103-114] that this subset FÎ0 is open. We describe the closure of FÎ0. As a consequence, we show that this subset FÎ0 is closed if and only if the virtual center of Î0 is trivial. This condition is satisfied if and only if FÎ0 contains a strongly1 irreducible representation.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematics (General)
Authors
Yves Benoist,