A Dimension Theorem for Vectors Fixed by Unipotent Groups.
Sia una varietà abeliana complessa di tipo Mumford. In queste note daremo una descrizione esplicita delle classi eccezionali in trovate da Hazama in [Ha] e le descriveremo geometricamente usando la grassmaniana delle rette di .
The purpose of this paper is to prove the existence of a free subgroup of the group of all affine transformations on the plane with determinant 1 such that the action of the subgroup is locally commutative.
The purpose of this paper is to give a general and a simple approach to describe the Sylow r-subgroups of classical groups.