PD Dr. Jörg Koppitz

2017 | On a Semigroup of n-ary Operations | Susanti, Y., Koppitz, J.Zeitschrift: Far East Journal of Mathematical Sciences (FJMS)Band: 102 no.4

2017 | Regular Semigroups of Partial Transformations Preserving a Fence | Lohapan, L., Koppitz, J.Zeitschrift: Novi Sad Journal of Mathematics (NSJOM)Band: 47 no. 2

2017 | Generating Sets of Semigroups of Partial Transformations Preserving a Zig-Zag Order on N | Dimitrova, I, Koppitz, J, Lohapan, L.Zeitschrift: International Journal of Pure and Applied MathematicsBand: 12 no. 2

2017 | Relations on a Semigroup of Sets of Transformations with Restricted Range. | Anantayasethi, A., Koppitz, J.Zeitschrift: Comptes rendus de l’Acad´emie bulgare des SciencesBand: 70 n0. 12

2017 | A Note on Generators of the endomorphism Semigroup of an infinite countable chain, | Dimitrova, I., Fernandes, V.H. and Koppitz,Zeitschrift: J. Algebra Appl.Band: 16

2016 | Generating sets of infinite full transformation semigroups with restricted range | Tinpun, K. and Koppitz JZeitschrift: Acta Sci. Math. (Szeged)Band: 82

2016 | Stable varieties of semigroups and groupoids | Koppitz, J. and Shtrakov, Sl.Zeitschrift: Algebra UniversalisBand: 75 no. 1

2016 | Relative Rank of the Finite Full Transformation Semigroup with Restricted Range | Tinpun, K. and Koppitz, J.Zeitschrift: Acta Math. Univ. ComenianaeBand: Vol. LXXXV, No. 2

2016 | Maximal subsemigroups of some semigroups of order-preserving mappings on a countably infinite set | Koppitz, J. and Musunthia, T.Zeitschrift: Forum MathematicumLink zur Publikation

2016 | On a Semigroup of Sets of Transformations with Restricted Range | Anantayasthi, A, and Koppitz, J.Zeitschrift: Thai Journal of MathematicsBand: 14, no. 3

2015 | Gröbner-Shirshov bases and embedding of a semigroup in a group | Karpuz, E.G., Cevik, A.S., Firat, A. and Koppitz, J.Zeitschrift: Adv. Stud. Contemp. Math. (Kyugshang)Band: 25 n0. 4

2015 | Separation of On from its proper subsemigroups by a single identity | Koppitz, J.Zeitschrift: Semigroup ForumBand: 91, No. 1

2015 | A Note on finite generated subsemigroups of T(X,Y), | Lekkoksung, N. and Koppitz, J.Zeitschrift: Math. ApplBand: 4

2014 | he subsemigroups of the full transformation semigroup T_n in the ideal K(n,2) satisfying x^k=x | Jende, A., Koppitz, J. and Musunthia, T.Zeitschrift: Southeast Asian Bulletin of MathematicsBand: 34

2014 | Maximal Subsemigroups containing a particular semigroup | Koppitz, J. and Musunthia, T.Zeitschrift: Mathematica SlovacaBand: 64

2013 | Category Equivalences of Clones of Operations Preserving Unary Operations | Koppitz, J. and Supaporn, W.Zeitschrift: Comptes rendus de l´Acadèmie bulgare des SciencesBand: 66 no. 2

2013 | Some fixed-point results on (generalized) Bruck-Reilly *-extensions of monoids | Karpuz, E.G., Cevik, A.S., Koppitz, J. and Cangul, I.N.Zeitschrift: Fixed Point Theory Appl.Link zur Publikation

2012 | On the Monoid of All Partial Order-preserving Extensive Transformations | Dimitrova, I. and Koppitz, J.Zeitschrift: Communications in AlgebraBand: 40

2012 | The maximal subsemigroups of semigroups of transformations preserving or reversing the orientation on a finite chain | Dimitrova, I., Fernandes, V.H. and Koppitz, J.Zeitschrift: Publications Mathematicae DebrecenBand: 81 no. 1

2012 | Finite Symmetric functions with non-trivial arity gap | Shtrakov, Sl. and Koppitz, J.Zeitschrift: Serdica J. ComputingBand: 6

2011 | On the maximal regular subsemigroups of ideals of order-preserving or order-reversing transformations | Dimitrova, I. and Koppitz, J.Zeitschrift: Semigroup ForumBand: 82

2011 | Coregular Semigroups of full Transformations | Dimitrova, I. and Koppitz, J.Zeitschrift: Demonstratio MathematicaBand: Vol. XLIV, No. 4

2010 | On Finite Functions with Non-trivial Arity Gap | Shtrakov, Sl. and Koppitz, J.Zeitschrift: Discussiones Mathematicae General Algebra and ApplicationsBand: 30

2010 | On some Anti-inverse Transformation Semigroups | Dimitrova, I. and Koppitz, J.Zeitschrift: Comptes redndus de I`Académie bulgare des SciencesBand: 63 no. 6

2010 | he relationship between proper and inner hypersubstitutions for varieties of rings | Koppitz, J. and Musunthia, T.Zeitschrift: Novi Sad J. MathBand: 40 n0. 3

2009 | All Reg-solid varieties of commutative semigroups | Koppitz, J.Zeitschrift: Semigroup ForumBand: 78 no.1

2009 | The maximal subsemigroupoups of the ideals of some semigroups of partial injections | Dimitrova, I. and Koppitz, J.Zeitschrift: Discussiones Mathematicae General Algebra and ApplicationsBand: 29 no. 2

2008 | The Greatest Regular-solid Variety of Semigroups | Denecke, K., Koppitz J. and Pabhapote, N.Zeitschrift: Discussiones Mathematicae General Algebra and ApplicationsBand: 28

2008 | Power Clones and Non-Deterministic Hypersubstitutions, | Denecke, K., Glubudom, P. and Koppitz, J.Zeitschrift: Asian-European Journal of MathematicsBand: 1 no. 2

2008 | On the Maximal Subsemigroups of Some Transformation Semigroups | Dimitrova, I. and Koppitz, J.Zeitschrift: Asian-European Journal of MathematicsBand: 1 no. 2

2007 | Maximal Submonoids of Monoids of Hypersubstitutions | Dimitrova, I. and Koppitz, J.Zeitschrift: Discussiones Mathematicae General Algebra and ApplicationsBand: 27

2007 | he degree of proper hypersubstitutions | Denecke, K., Koppitz, J. and Srithus, R.Zeitschrift: Sci. Math. Jpn.Band: 66 no. 2

2007 | N-fluid Varieties | Denecke, K., Koppitz, J. and Srithus, R.Zeitschrift: Sci. Math. Jpn.Band: 65 no. 1

2006 | Multi-Hypersubstitutions and Colored Solid Varieties | Denecke, K., Koppitz, J. and Shtrakov, Sl.,Zeitschrift: International Journal of Algebra and ComputationBand: 16 no. 4

2006 | Free Systems of Algebras and Ultraclosed Classes | hron, R. and Koppitz, J.Zeitschrift: Acta Math. Univ. ComenianaeBand: Vol. LXXV no. 1

2005 | Presolid Varieties of n-semigroups | Chantasartrassmee, A. and Koppitz, J.Zeitschrift: Discussiones Mathematicae General Algebra and ApplicationsBand: 25

2005 | On mappings of terms determined by hypersubstituions | Koppitz, J. and Shtrakov, Sl.Zeitschrift: Journal of Algebra and Discrete MathematicsBand: 3

2004 | Hypersubstitutions and Groups | Koppitz, J.Zeitschrift: Novi Sad Math.Band: 34 no.2

2003 | Lattice-theoretically characterized classes of finite bands | Koppitz, J. and Thron, R.Zeitschrift: Archivum Mathematicum (Brno)Band: 39

2002 | Equational Theories generated by Hypersubstitutions of Type (n) | Denecke, K., Koppitz, J. and Niwczyk, St.Zeitschrift: International Journal of Algebra and ComputationBand: 12 no. 6

2002 | Solid varieties of arbitrary type | Denecke, K., Koppitz, J. and Wismath, S.L.,Zeitschrift: Algebra UniversalisBand: 48

2001 | Closure Operators and Generating Sets | Thron, R. and Koppitz, J.Zeitschrift: Mathematica SlovacaBand: 51

2001 | rongly fluid and weakly unsolid varieties | Arworn, Sr., Denecke, K. and Koppitz, J.Zeitschrift: Scientiae Matematicae JaponiacaeBand: 54 no. 1

2001 | The semantical hyperunification problem | Denecke, K., Koppitz, J. and Wismath, S.LZeitschrift: Discussiones Mathematicae General Algebra and ApplicationsBand: 21

2001 | The depth of a hypersubstitution | Denecke, K., Koppitz, J. and Shtrakov Sl.,Zeitschrift: Journal of Automata, Languages and CombinatoricsBand: 6 no. 3

2001 | Essential variables in hypersubstitutions | Denecke, K. and Koppitz, J.Zeitschrift: Algebra UniversalisBand: 46

2000 | Hyperidentities for Varieties of Star bands | Koppitz, J. and Wismath, S.L.Zeitschrift: Sci. Math.Band: 3

2000 | All 2-solid varieties of semigroups | Koppitz, JZeitschrift: Semigroup ForumBand: 60

2000 | Fluid, unsolid and completely unsolid varieties | Denecke, K. and Koppitz, J.Zeitschrift: Algebra ColloquiumBand: 7 no. 4

1999 | Finite Relational Disjunctions | Thron, R. and Koppitz, J.Zeitschrift: Algebra ColloquiumBand: 6 no. 3

1998 | Derived theories and derived equational theories | Denecke, K., Koppitz, J. and Marszałek, R.Zeitschrift: International Journal of Algebra and ComputationBand: 6 no. 2

1998 | Finite monoids of hypersubstitutions of type τ = (2) | Denecke, K. and Koppitz, J.Zeitschrift: Semigroup ForumBand: 56

1998 | M-solid monoids of hypersubstitutions of type τ = (2) | Denecke, K. and Koppitz, J.Zeitschrift: Semigroup ForumBand: 57

1997 | Maps between M-solid Varieties of semigroups | Denecke, K., Koppitz, J. and Wismath, S.L.,Zeitschrift: Discussiones Mathematicae Algebra and Stochastic MethodsBand: 17

1997 | M-solid subvarieties of some varieties of commutative semigroups | Koppitz, J.Zeitschrift: Serdica Mathematical JournalBand: 23

1996 | Hyperidentities and Subvarieties of Varieties of commutative nilpotent Semigroups | Koppitz, J.Zeitschrift: Comptes rendus de l´Acadèmie bulgare des SciencesBand: 49 no. 7-8

1995 | Pre-Solid Varieties of Semigroups | Denecke, K. and Koppitz, J.Zeitschrift: Archivum Mathematicum (Brno)Band: 31

1995 | Pre-Solid Varieties of Commutative Semigroups | Denecke, K. and Koppitz, J.Zeitschrift: Tatra Mountains Math. Publ.Band: 5

1995 | M-Solid Varieties of Semigroups | Denecke, K. and Koppitz, J.Zeitschrift: Discussiones Mathematicae Algebra and Stochastic MethodsBand: 15

1994 | Hyperassociative Varieties of Semigroups | Denecke, K. and Koppitz, J.Zeitschrift: Semigroup ForumBand: 49