Results 11 to 20 of about 1,220 (267)
Varieties of Orthomodular Lattices
Canadian Journal of Mathematics, 1971 In this paper we start investigating the lattice of varieties of orthomodular lattices. The varieties studied here are those generated by orthomodular lattices which are the horizontal sum of Boolean algebras.
Günter Bruns, Gudrun Kalmbach
core +2 more sources
The amalgamation property for varieties of lattices [PDF]
Transactions of the American Mathematical Society, 1984 There are precisely three varieties of lattices that satisfy the amalgamation property: trivial lattices, distributive lattices, and all lattices.
Alan Day, Jaroslav Ježek
core +2 more sources
Pointed lattice subreducts of varieties of residuated lattices
OrderWe study the pointed lattice subreducts of varieties of residuated lattices (RLs) and commutative residuated lattices (CRLs), i.e. lattice subreducts expanded by the constant 1 denoting the multiplicative unit.
Přenosil, Adam
core +3 more sources
Complexity of hypersubstitutions and lattices of varieties
Discussiones Mathematicae - General Algebra and Applications, 2003 Hypersubstitutions are mappings which map operation symbols to terms. The set of all hypersubstitutions of a given type forms a monoid with respect to the composition of operations.
Denecke, Klaus, Changphas, Thawhat
core +4 more sources
On Lattices of Varieties of Restriction Semigroups
Semigroup Forum, 2012 The left restriction semigroups have arisen in a number of contexts, one being as the abstract characterization of semigroups of partial maps, another as the ‘weakly left E-ample’ semigroups of the ‘York school’, and, more recently as a variety of unary ...
Jones, Peter R.
core +4 more sources
The Lattice of Varieties of Implication Semigroups [PDF]
Order, 2019 Compared with the previous version, we rewrite Section 3 and add Appendixes A and ...
Sergey V. Gusev +2 more
openaire +3 more sources
Varieties of Lattices with Geometric Descriptions [PDF]
Order, 2011 A lattice L is spatial if every element of L is a join of completely join-irreducible elements of L (points), and strongly spatial if it is spatial and the minimal coverings of completely join-irreducible elements are well-behaved. Herrmann, Pickering, and Roddy proved in 1994 that every modular lattice can be embedded, within its variety, into an ...
Luigi Santocanale, Friedrich Wehrung
openaire +5 more sources
Ideals and congruences in $L$-algebras and pre-$L$-algebras [PDF]
Categories and General Algebraic Structures with ApplicationsWe link the recent theory of $L$-algebras to previous notions of Universal Algebra and Categorical Algebra concerning subtractive varieties, commutators, multiplicative lattices, and their spectra.
Marino Gran +2 more
doaj +1 more source
Moduli space singularities for 3d N = 4 $$ \mathcal{N}=4 $$ circular quiver gauge theories
Journal of High Energy Physics, 2018 The singularity structure of the Coulomb and Higgs branches of good 3d N = 4 $$ \mathcal{N}=4 $$ circular quiver gauge theories (CQGTs) with unitary gauge groups is studied. The central method employed is the Kraft-Procesi transition. CQGTs are described
Jamie Rogers, Radu Tatar
doaj +1 more source
Simple and subdirectly irreducibles bounded distributive lattices with unary operators
International Journal of Mathematics and Mathematical Sciences, 2006 We characterize the simple and subdirectly irreducible distributive algebras in some varieties of distributive lattices with unary operators, including topological and monadic positive modal algebras. Finally, for some varieties of Heyting algebras with
Sergio Arturo Celani
doaj +1 more source