On three lattices that belong to every semigroup
On three-dimensional space groups.
On tilting modules for algebraic groups.
On TI-subgroups and QTI-subgroups of finite groups
Let be a group. A subgroup of is called a TI-subgroup if or for every and is called a QTI-subgroup if for any . In this paper, a finite group in which every nonabelian maximal is a TI-subgroup (QTI-subgroup) is characterized.
On Tits' conjecture and other questions concerning Artin and generalized Artin groups.
On tolerance relations
On tolerances on periodic semigroups
On topologies of free groups
On torsion-free periodic rings.
On totally inert simple groups
A subgroup H of a group G is inert if |H: H ∩ H g| is finite for all g ∈ G and a group G is totally inert if every subgroup H of G is inert. We investigate the structure of minimal normal subgroups of totally inert groups and show that infinite locally graded simple groups cannot be totally inert.
On totally non-commutative convergence groupoids
On totally SLA-simple semigroups
On transformation semigroups which are -semigroups.
On transitivity of pronormality
This article is dedicated to soluble groups, in which pronormality is a transitive relation. Complete description of such groups is obtained.
On translations in quasidistributive semilattices
On t-semigroups.
On tubes for blocks of wild type
We show that any block of a group algebra of some finite group which is of wild representation type has many families of stable tubes.
On twisted group algebras of OTP representation type
Assume that S is a commutative complete discrete valuation domain of characteristic p, S* is the unit group of S and is a finite group, where is a p-group and B is a p’-group. Denote by the twisted group algebra of G over S with a 2-cocycle λ ∈ Z²(G,S*). We give necessary and sufficient conditions for to be of OTP representation type, in the sense that every indecomposable -module is isomorphic to the outer tensor product V W of an indecomposable -module V and an irreducible -module...
On twisted group algebras of OTP representation type over the ring of p-adic integers
Let be the ring of p-adic integers, the unit group of and a finite group, where is a p-group and B is a p’-group. Denote by the twisted group algebra of G over with a 2-cocycle . We give necessary and sufficient conditions for to be of OTP representation type, in the sense that every indecomposable -module is isomorphic to the outer tensor product V W of an indecomposable -module V and an irreducible -module W.
On two- and three-element subsets of groups.