Results 11 to 20 of about 81 (74)
Finite Lattices Generating Not Finitely–Based and Nonstandard Quasivarieties
Journal of MathematicsThere are two well-known and closely related problems in lattice theory: Which finite lattices generate finitely-based quasivarieties? and Which finite lattices generate standard quasivarieties?
M. A. Arapbay +2 more
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Discrimination in a General Algebraic Setting. [PDF]
ScientificWorldJournal, 2015 Discriminating groups were introduced by G. Baumslag, A. Myasnikov, and V. Remeslennikov as an outgrowth of their theory of algebraic geometry over groups. Algebraic geometry over groups became the main method of attack on the solution of the celebrated Tarski conjectures.
Fine B +3 more
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Journal of Mathematics, Volume 2022, Issue 1, 2022., 2022 The main goal of this paper is to introduce and investigate the related theory on monadic effect algebras. First, we design the axiomatic system of existential quantifiers on effect algebras and then use it to give the definition of the universal quantifier and monadic effect algebras.
Yuxi Zou, Xiaolong Xin, Li Guo
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Admissibility in Finitely Generated Quasivarieties [PDF]
Logical Methods in Computer Science, 2013 Checking the admissibility of quasiequations in a finitely generated (i.e., generated by a finite set of finite algebras) quasivariety Q amounts to checking validity in a suitable finite free algebra of the quasivariety, and is therefore decidable ...
George Metcalfe +1 more
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The Relatively Free Groups F(Nc∧A2) Satisfy Noncentral Commutative Transitivity
Algebra, Volume 2014, Issue 1, 2014., 2014 We prove that a free group, F(Nc∧A2), relative to the variety, Nc∧A2, of all groups simultaneously nilpotent of class at most c and metabelian is such that the centralizer of every noncentral element is abelian. We relate that result to the model theory of such groups as well as a quest to find a relative analog in Nc∧A2 of a classical theorem of ...
Anthony M. Gaglione +3 more
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Algebraic Theories of Quasivarieties
Journal of Algebra, 1998 By the theory of a locally finitely presentable category \(\mathcal K\) is meant the dual \(\text{Th}(\mathcal K)\) of the subcategory of finitely presentable objects. The authors characterize the theories of (many-sorted, finitary) (a) quasivarieties and (b) Horn classes.
Adámek, Jiřı́, Porst, Hans-E
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Generalized Derivations of BCC‐Algebras
International Journal of Mathematics and Mathematical Sciences, Volume 2013, Issue 1, 2013., 2013 The notion of generalized derivations of BCC‐algebras is introduced, and some related properties are investigated. Also, we consider regular generalized derivations and the D‐invariant on ideals of BCC‐algebras. We also characterized KerD by generalized derivations.
S. M. Bawazeer +3 more
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On Cubic KU‐Ideals of KU‐Algebras
International Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013 We introduce the notion of cubic KU‐ideals of KU‐algebras and several results are presented in this regard. The image, preimage, and cartesian product of cubic KU‐ideals of KU‐algebras are defined.
Naveed Yaqoob +4 more
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A notion of functional completeness for first‐order structure
International Journal of Mathematics and Mathematical Sciences, Volume 2005, Issue 14, Page 2207-2215, 2005., 2005 Using ☆‐congruences and implications, Weaver (1993) introduced the concepts of prevariety and quasivariety of first‐order structures as generalizations of the corresponding concepts for algebras. The notion of functional completeness on algebras has been defined and characterized by Burris and Sankappanavar (1981), Kaarli and Pixley (2001), Pixley ...
Etienne R. Alomo Temgoua, Marcel Tonga
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The inconsistency predicate on De Morgan lattices
Acta Universitatis Carolinae: Philosophica et Historica, 2017 We consider expansions of De Morgan lattices by an additional unary predicate interpreted in each De Morgan lattice by the ideal generated by all elements of the form a ∧ −a, and describe the finite lattice of strict universal Horn classes of such ...
Adam Přenosil
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