Jörg Koppitz

The Rank of the Semigroup of All Order-Preserving Transformations on a Finite Fence

Vítor H. Fernandes, Jörg Koppitz, Tiwadee Musunthia · Bulletin of the Malaysian Mathematical Sciences Society · 2018 · 18 citations · Full text

Finite Fence, Topological Semigroups, All Order-preserving Transformations +4

The maximal subsemigroups of semigroups of transformations preserving or reversing the orientation on a finite chain

Ilinka Dimitrova, Vítor H. Fernandes, Jörg Koppitz · Publicationes Mathematicae Debrecen · 2012 · 17 citations · Full text

The maximal subsemigroups of the ideals of some semigroups of partial injections

Ilinka Dimitrova, Jörg Koppitz · Discussiones Mathematicae - General Algebra and Applications · 2009 · 15 citations

Topological Semigroups, Semigroup Imn, Ring Theory +7

ON THE MAXIMAL SUBSEMIGROUPS OF SOME TRANSFORMATION SEMIGROUPS

Ilinka Dimitrova, Jörg Koppitz · Asian-European Journal of Mathematics · 2008 · 14 citations

Topological Semigroups, Monotone Singular Transformations, Semigroup M N +4

On the Monoid of All Partial Order-Preserving Extensive Transformations

Ilinka Dimitrova, Jörg Koppitz · Communications in Algebra · 2012 · 13 citations

Order Theory, Topological Semigroups, Partial Transformation α +6