The a-bicyclic semigroup as a topological semigroup.
The bicommutator of the injective hull of a nonsingular semigroup.
The Bohr compactification of a dense ideal in a topological semigroup.
The centralizing theorem for left normal groups of units in compact monoids.
The classification of global Lie wedges in sl(2).
The combinatorial derivation and its inverse mapping
Let G be a group and P G be the Boolean algebra of all subsets of G. A mapping Δ: P G → P G defined by Δ(A) = {g ∈ G: gA ∩ A is infinite} is called the combinatorial derivation. The mapping Δ can be considered as an analogue of the topological derivation d: P X→ P X, A ↦ A d, where X is a topological space and A d is the set of all limit points of A. We study the behaviour of subsets of G under action of Δ and its inverse mapping ∇. For example, we show that if G is infinite and I is an ideal in...
The compact open topology for semigroups of continuous selfmaps.
The earliest semigroup paper?
The equivalence of uniquely divisible semigroups and uniquely representable semigroups on the two-cell.
The existence and structure of IRR(X).
The existence of Irr X.
The fixed-point conjecture and monoids on a manifold with boundary.
The Foliation of Semigroups by Congruence Classes.
The free compact lattice generated by a topological semilattice.
The groups of the semigroup of compact subsets of a topological group.
The ideal structure of XX.
The kernel of the determining endomorphism of a bisimple ...-semigroup.
The -compactification of a topologized semigroup
The local theory of semigroups in nilpotent Lie groups.
The Maak compactification of a dense subsemigroup.