On the variety Csub
Václav Slavík (1991)
Commentationes Mathematicae Universitatis Carolinae
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The variety of lattices generated by lattices of all convex sublattices of distributive lattices is investigated.
Displaying similar documents to “An equational basis in four variables for the three-element tournament”
On the variety Csub
On the one class of hyperbolic systems.
Adler, Vsevolod E., Shabat, Alexey B. (2006)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Separation properties in congruence lattices of lattices
Miroslav Ploščica (2000)
Colloquium Mathematicae
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We investigate the congruence lattices of lattices in the varieties . Our approach is to represent congruences by open sets of suitable topological spaces. We introduce some special separation properties and show that for different n the lattices in have different congruence lattices.
Distributive multisemilattices
Arthur Knoebel, Anna Romanowska
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A distributive multisemilattice of type n is an algebra with a family of n binary semilattice operations on a common carrier that are mutually distributive. This concept for n=2 comprises the distributive bisemilattices (or quasilattices), of which distributive lattices and semilattices with duplicated operations are the best known examples. Multisemilattices need not satisfy the absorption law, which holds in all lattices.Kalman has exhibited a subdirectly irreducible distributive bisemilattice...
Characteristic vectors of unimodular lattices which represent two
Mark Gaulter (2007)
Journal de Théorie des Nombres de Bordeaux
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We improve the known upper bound of the dimension of an indecomposable unimodular lattice whose shadow has the third largest possible length, .
Finitely generated almost universal varieties of 0-lattices.
Koubek, V., Sichler, J. (2005)
Commentationes Mathematicae Universitatis Carolinae
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Turning retractions of an algebra into an algebra.
Mašulović, Dragan (2004)
Novi Sad Journal of Mathematics
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