Inverse semirings and their lattice of congruences
Displaying 161 – 180 of 416
Joins and meets of congruences on a regular semigroup.
P.R. Jones (1984)
Semigroup forum
Joins of congruences in -groups
František Šik (1981)
Časopis pro pěstování matematiky
Kernels of tolerance relations.
Chajda, I., Czédli, G., Rosenberg, I.G. (1996)
Acta Mathematica Universitatis Comenianae. New Series
Lattice isomorphisms of commutative relatively free semigroups.
A.J. Ovsyannikov (1980)
Semigroup forum
Lattice valued algebras.
Antonio Di Nola, Giangiacomo Gerla (1987)
Stochastica
In this paper we propose a general approach to the theory of fuzzy algebras, while the early existing papers deal with a particular type of fuzzy structures as fuzzy groups, fuzzy ideals, fuzzy vector spaces and so on.
LC-commutative permutable semigroups.
Z. Jiang (1996)
Semigroup forum
Local versions of some congruence properties in single algebras
Ivan Chajda, Gerhard Dorfer, Helmut Länger (2004)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
We investigate some local versions of congruence permutability, regularity, uniformity and modularity. The results are applied to several examples including implication algebras, orthomodular lattices and relative pseudocomplemented lattices.
Locally coherent algebras
Ivan Chajda (1999)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
Mal'cev conditions for congruence-regular and congruence-permutable varieties
Jaromír Duda (1979)
Commentationes Mathematicae Universitatis Carolinae
Mal'cev conditions for directly decomposable compatible relations
Jaromír Duda (1989)
Czechoslovak Mathematical Journal
Mal'cev-type theorems for partial congruences
Jaromír Duda (1990)
Časopis pro pěstování matematiky
Metrics and tolerances
Ivan Chajda, Bohdan Zelinka (1978)
Archivum Mathematicum
Minimal conditions on Clifford semigroup congruences.
Abdallah, M.El-Ghali M., Gab-Alla, L.N., Elagan, Sayed K.M. (2006)
International Journal of Mathematics and Mathematical Sciences
Modular elements in congruence lattices of -sets.
Vernikov, Boris M. (2000)
Beiträge zur Algebra und Geometrie
Modularity and distributivity of tolerance lattices of commutative inverse semigroups
Bedřich Pondělíček (1985)
Czechoslovak Mathematical Journal
Modularity and distributivity of tolerance lattices of commutative separative semigroups
Bedřich Pondělíček (1985)
Czechoslovak Mathematical Journal
Note on algebraic interior systems
Ivan Chajda (2005)
Discussiones Mathematicae - General Algebra and Applications
We get an interrelation between an algebraic closure system and its conjugated interior system. We introduce the concept of algebraic interior system and we get its representation.
Note on compatible binary relations on algebras
Jan Chvalina (1981)
Archivum Mathematicum
Notes on left distributive groupoids
Tomáš Kepka (1981)
Acta Universitatis Carolinae. Mathematica et Physica