Results 11 to 20 of about 19,007 (230)
Varieties of distributive rotational lattices [PDF]
, 2012 A rotational lattice is a structure (L;\vee,\wedge, g) where L=(L;\vee,\wedge) is a lattice and g is a lattice automorphism of finite order. We describe the subdirectly irreducible distributive rotational lattices. Using Jónsson's lemma, this leads to a description of all varieties of distributive rotational lattices.
Czédli, Gábor, Nagy, Ildikó V.
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On lattices of varieties of restriction semigroups [PDF]
Semigroup Forum, 2012 In the abstract of the paper the author writes: ``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 semigroups defined by a set of simple identities.''
Jones, Peter R.
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On singularities of lattice varieties [PDF]
, 2013 Toric varieties associated with distributive lattices arise as a fibre of a flat degeneration of a Schubert variety in a minuscule. The singular locus of these varieties has been studied by various authors. In this article we prove that the number of diamonds incident on a lattice point $\a$ in a product of chain lattices is more than or equal to the ...
Mukherjee, Himadri
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Binomial Difference Ideal and Toric Difference Variety [PDF]
, 2015 In this paper, the concepts of binomial difference ideals and toric difference varieties are defined and their properties are proved. Two canonical representations for Laurent binomial difference ideals are given using the reduced Groebner basis of Z[x ...
Gao, Xiao-Shan +2 more
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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
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Varieties whose tolerances are homomorphic images of their congruences [PDF]
, 2012 The homomorphic image of a congruence is always a tolerance (relation) but, within a given variety, a tolerance is not necessarily obtained this way. By a Maltsev-like condition, we characterize varieties whose tolerances are homomorphic images of their ...
Czedli, Gabor, Kiss, Emil W.
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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
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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
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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 ...
Santocanale, Luigi, Wehrung, Friedrich
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On the geometry of lattices and finiteness of Picard groups [PDF]
, 2019 Let (K, O, k) be a p-modular system with k algebraically closed and O unramified, and let Λ be an O-order in a separable K-algebra. We call a Λ-lattice L rigid if Ext1Λ(L, L) = 0, in analogy with the definition of rigid modules over a finite-dimensional ...
Eisele, F.
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