Schreier-Zassenhaus theorem for algebras. I
Schreier-Zassenhaus theorem for algebras. II
Semiaffinitäten von Gruppen.
Semigroups with A-semidistributive subsemigroup lattices.
Soluble Groups with Many Černikov Quotients
Si studiano i gruppi risolubili non di Černikov a quozienti propri di Černikov. Nel caso periodico tali gruppi sono tutti e soli i prodotti semidiretti con -gruppo abeliano elementare infinito e gruppo irriducibile di automorfismi di che sia infinito e di Černikov. Nel caso non periodico invece si riconduce tale studio a quello dei moduli a quozienti...
Soluble products of nilpotent groups
Soluble Products of Polycyclic Groups.
Soluble products of two locally finite groups with min- for every prime
Solvable groups with many BFC-subgroups.
We characterize the solvable groups without infinite properly ascending chains of non-BFC subgroups and prove that a non-BFC group with a descending chain whose factors are finite or abelian is a Cernikov group or has an infinite properly descending chain of non-BFC subgroups.
Solvable R*-groups.
Some group theoretic problems inspired by ring theoretic analogies.
Some infinite p-groups.
Some lattice properties of normal-by-finite subgroups
A subgroup of a group is said to be normal-by-finite if the core of in has finite index in . It has been proved by Buckley, Lennox, Neumann, Smith and Wiegold that if every subgroup of a group G is normal-by-finite, then is abelian-by-finite, provided that all its periodic homomorphic images are locally finite. The aim of this article is to describe the structure of groups G for which the partially ordered set consisting of all normal-by-finite subgroups satisfies certain relevant...
Su certe classi di gruppi unipotenti
Si presentano alcuni risultati che caratterizzano i gruppi algebrici unipotenti aventi come reticolo dei sottogruppi connessi una catena e si discutono alcuni risultati conseguenti.
Su una classe di gruppi con molti sottogruppi quasinormali
Subgroup Lattices for Crystallographic Groups
Subgroups normalized by the commutator subgroup of the Levi subgroup.
Subgroups of finite index in generalized -groups
Subgroups of finite index in nilpotent groups.
Subgroups of split orthogonal groups. II.