Projektivitätstypen torsionsfreier abelscher Gruppen vom Rang 1
Pronormal and subnormal subgroups and permutability
We describe the finite groups satisfying one of the following conditions: all maximal subgroups permute with all subnormal subgroups, (2) all maximal subgroups and all Sylow -subgroups for permute with all subnormal subgroups.
Pronormality, contranormality and generalized nilpotency in infinite groups.
This article is dedicated to some criteria of generalized nilpotency involving pronormality and abnormality. Also new results on groups, in which abnormality is a transitive relation, have been obtained.
Radical subgroups of lattice ordered groups
Rational Lie Algebras and p-Isomorphisms of Nilpotent Groups and Homotopy Types.
Recognizability in the lattice of convex -subgroups of a lattice-ordered group
RECOGNIZABLE LANGUAGES AND FINITE SEMILATTICES OF GROUPS.
Representing lattices by homotopy groups of graphs
In this paper we represent every lattice by subgroups of free groups using the concept of the homotopy group of a graph.
Residually finite groups with nontrivial intersections of pairs of subgroups.
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.