Ein fast-Jordan-Hölder Satz für Fastideale.
Embedding inverse semigroups in coset semigroups.
Embedding semigroups into semigroups with countability index two.
Endomorphism monoids of free acts and 0-wreath products of monoids III.
Endomorphism monoids of free acts and 0-wreath products of monoids, I. Annihilator properties.
Endomorphism monoids of free acts and 0-wreath products of monoids, II. Regularity.
Endomorphisms of complete Heyting algebras.
Erratum to “On homological classification of pomonoids by regular weak injectivity properties of S-posets”
The original version of the article was published in Central European Journal of Mathematics, 2007, 5(1), 181–200, DOI: 10.2478/s11533-006-0036-3. Unfortunately, the original version of this article contains a mistake: in Theorem 5.2 only conditions (i) and (ii) (and not (iii)) are equivalent. We correct the theorem and its proof.
Extension of additive functionals and semicharacters on commutative semigroups.
Extension of Characters on *-Semigroups.
Extensions normales de demi-groupes inverses