Parabolic subgroups with Abelian unipotent radical.
Periodic groups saturated with the groups .
Plongements d'espaces symétriques algébriques : une classification
Polarization in the Classical Groups.
Prescribed Gauss decompositions for Kac-Moody groups over fields
Principe de Hasse pour les espaces principaux homogènes sous les groupes classiques sur un corps de dimension cohomologique virtuelle au plus 1.
Products of conjugacy classes in perfect linear groups. Extended covering number.
Pseudo-abelian varieties
Chevalley’s theorem states that every smooth connected algebraic group over a perfect field is an extension of an abelian variety by a smooth connected affine group. That fails when the base field is not perfect. We define a pseudo-abelian variety over an arbitrary field to be a smooth connected -group in which every smooth connected affine normal -subgroup is trivial. This gives a new point of view on the classification of algebraic groups: every smooth connected group over a field is an extension...