On congruence lattices of regular semigroups with Q-inverse transversals.
On congruence permutable -sets
An algebraic structure is said to be congruence permutable if its arbitrary congruences and satisfy the equation , where denotes the usual composition of binary relations. To an arbitrary -set satisfying , we assign a semigroup on the base set containing a zero element , and examine the connection between the congruence permutability of the -set and the semigroup .
On congruences of ...x-normal semigroups.
On congruences on finite semigroups.
On cross semigroup varieties and related questions.
On c-semigroups
On dedekind monoids.
On delta sets and their realizable subsets in Krull monoids with cyclic class groups
Let M be a commutative cancellative monoid. The set Δ(M), which consists of all positive integers which are distances between consecutive factorization lengths of elements in M, is a widely studied object in the theory of nonunique factorizations. If M is a Krull monoid with cyclic class group of order n ≥ 3, then it is well-known that Δ(M) ⊆ {1,..., n-2}. Moreover, equality holds for this containment when each class contains a prime divisor from M. In this note, we consider the question of determining...
On determinacies of monoids.
On dual semigroups
On Dual Semigroups
On Ek-semigroups.
On E-m semigroups which are bands of t-archimedean semigroups.
On endomorphisms and partial transformations.
On epics and dominions of bands.
On equalizer-flat and pullback-flat acts.
On equationally compact semigroups.
On exactness of long sequences of homology semimodules.
On exclusive semigroups.
On exposed semigroup homomorphisms.