Results 21 to 30 of about 1,220 (267)
Compact elements in the lattice of varieties [PDF]
Mathematica Bohemica, 2005 Summary: We prove that the lattice of varieties contains almost no compact elements.
Ježek, J., Slavík, V.
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Congruence lattices in varieties with compact intersection property [PDF]
, 2014 summary:We say that a variety ${\mathcal V}$ of algebras has the Compact Intersection Property (CIP), if the family of compact congruences of every $A\in {\mathcal V}$ is closed under intersection.
Ploščica, Miroslav, Krajník, Filip
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The Order of Hypersubstitutions of Type (2,1)
International Journal of Mathematics and Mathematical Sciences, 2011 Hypersubstitutions are mappings which map operation symbols to terms of the corresponding arities. They were introduced as a way of making precise the concept of a hyperidentity and generalizations to 𝑀-hyperidentities.
Tawhat Changphas, Wonlop Hemvong
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Quasi-Varieties, Congruences, and Generalized Dowling Lattices [PDF]
, 1995 Dowling lattices and their generalizations introduced by Hanlon are interpreted as lattices of congruences associated to certain quasi-varieties of sets with group actions.
Blass, Andreas
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On the lattice of varieties of bands of groups [PDF]
Pacific Journal of Mathematics, 1980 1* Introduction* When considered as semigroups with an additional unary operation x —> x~\ where x~ denotes the (unique) inverse of x in the subgroup to which it belongs, the class CR of completely regular semigroups (often called unions of groups) forms a variety of universal algebras, containing as a subvariety thevariety BG of bands of groups (those
Hall, T. E., Jones, P. R.
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Varieties of unary-determined distributive $\ell$-magmas and bunched implication algebras [PDF]
Logical Methods in Computer ScienceA distributive lattice-ordered magma ($d\ell$-magma) $(A,\wedge,\vee,\cdot)$ is a distributive lattice with a binary operation $\cdot$ that preserves joins in both arguments, and when $\cdot$ is associative then $(A,\vee,\cdot)$ is an idempotent semiring.
Natanael Alpay +2 more
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Complete congruences on lattices of varieties and of pseudovarieties
International Journal of Algebra and Computation, 1998 Three methods for the construction of all complete congruences on the lattice Lv(V) of subvarieties of a variety V are introduced. It is shown that there exists an order preserving embedding of the lattice of complete congruences on the lattice Lp(P) of ...
Pastijn, F (15483074) +1 more
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International Journal of Mathematics and Mathematical Sciences, 1992 We show that there are varieties of somewhat different loop soliton lattices when we specify an integration path in No Integrability Aesthetic Field Theory. These are illustrated using two dimensional computer maps.
M. Muraskin
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Principal and syntactic congruences in congruence-distributive and congruence-permutable varieties
, 2008 We give a new proof that a finitely generated congruence-distributive variety has finitely determined syntactic congruences (or, equivalently, term finite principal congruences), and show that the same does not hold for finitely generated congruence ...
McKenzie, Ralph +3 more
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Special elements in lattices of semigroup varieties [PDF]
, 2015 We survey results concerning special elements of eight types (modular, lower-modular, upper-modular, distributive, codistributive, standard, costandard and neutral elements) in the lattice of all semigroup varieties and three of its sublattices, namely ...
Vernikov, B. M. +2 more
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