The amalgamation basis of the category of compact groups.
The Embedding of Some Lattices into Lattices of All Subgroups of Free Groups
The Lattice automorphisms of simple algebraic groups over F2.
The lattice of solid -subgroups of a retractable group
The Lower Central Series of a Join of Subnormal Subgroups.
The lower garland of subgroup lattices in linear groups.
The nilpotency of some groups with all subgroups subnormal.
Let G be a group with all subgroups subnormal. A normal subgroup N of G is said to be G-minimax if it has a finite G-invariant series whose factors are abelian and satisfy either max-G or min- G. It is proved that if the normal closure of every element of G is G-minimax then G is nilpotent and the normal closure of every element is minimax. Further results of this type are also obtained.
The structure of subnormal subgroups of symplectic groups over local rings.
The theorem of Borevich for the hyperbolic unitary group over a noncommutative field.
Torsionsfreie Gruppen, deren Untergruppen alle subnormal sind.
Transitivité pour une certaine normalité faible dans un groupe.