Non-unique factorizations in orders of global fields.
Normal polytopes, triangulations, and Koszul algebras.
Note on finite commutative nil-semigroups
Note on quasi-Hamiltonian semigroups
Note on the congruence lattice of a commutative separative semigroup
Numerical semigroups with a monotonic Apéry set
We study numerical semigroups with the property that if is the multiplicity of and is the least element of congruent with modulo , then . The set of numerical semigroups with this property and fixed multiplicity is bijective with an affine semigroup and consequently it can be described by a finite set of parameters. Invariants like the gender, type, embedding dimension and Frobenius number are computed for several families of this kind of numerical semigroups.
On a class of modular numerical semigroups.
On a problem of B. Zelinka
On a problem of B. Zelinka, II
On commutative exclusive semigroups.
On commutative principal ideal semigroup rings.
On conditionally commutative semigroups.
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 expressing commutativity by finite Church-Rosser presentations : a note on commutative monoids
On finitely generated submonoids of N k
On generalized conditionally commutative semigroups
On injective and flat commutative regular semigroups.
On la-semigroup defined by a commutative inverse semigroup
On linear algebraic semigroups. III.
On numerical semigroups.