On the converse of a theorem of Harte and Mbekhta: Erratum to "On generalized inverses in C*-algebras"
We prove that the converse of Theorem 9 in "On generalized inverses in C*-algebras" by Harte and Mbekhta (Studia Math. 103 (1992)) is indeed true.
On the decomposition of RL-semigroups into groups.
On the embedding of ordered semigroups into ordered group
It was shown in [7] that any right reversible, cancellative ordered semigroup can be embedded into an ordered group and as a consequence, it was shown that a commutative ordered semigroup can be embedded into an ordered group if and only if it is cancellative. In this paper we introduce the concept of -maher and -maher semigroups and use a technique similar to that used in [7] to show that any left reversible cancellative ordered or -maher semigroup can be embedded into an ordered group.
On the Embedding of Semigroups into 2-Engel Groups
On the Embedding of Semigroups into Nilpotent Groups
On the finiteness of the semigroup of conjugacy classes of left ideals for algebras with radical square zero
Let A be a finite-dimensional algebra over an algebraically closed field with radical square zero, and such that all simple A-modules have dimension at most two. We give a characterization of those A that have finitely many conjugacy classes of left ideals.
On the K-theory of the -algebra generated by the left regular representation of an Ore semigroup
We compute the -theory of -algebras generated by the left regular representation of left Ore semigroups satisfying certain regularity conditions. Our result describes the -theory of these semigroup -algebras in terms of the -theory for the reduced group -algebras of certain groups which are typically easier to handle. Then we apply our result to specific semigroups from algebraic number theory.
On the maximal order in and
On the semigroup of binary relations on a finite set
On tolerances on periodic semigroups
On translations in quasidistributive semilattices
Ordres maximaux
Orthodox -semigroups.
-hypergoupes
Partial Abelian H_u-Monoids
Partial groupoids with some associativity conditions
Products OF IDEMPOTENT ORDER-PRESERVING TRANSFORMATIONS OF ARBITRARY CHAINS.
Projectivity of acts and Morita equivalence of monoids.
Průměr grafu pologrupy
Průměr grafu systému vlastních podpologrup komutativní pologrupy