On the weak regularity of semigroup rings.
On the word problem for free bands of groups and for free objects in some other varieties of completely regular semigroups.
On the word problem for free completely regular semigroups.
On Thévenaz' parametrization of interior G-algebras.
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.