Results 31 to 40 of about 138,244,374 (198)

On Complete Representations and Minimal Completions in Algebraic Logic, Both Positive and Negative Results

open access: yesBulletin of the Section of Logic, 2021
Fix a finite ordinal \(n\geq 3\) and let \(\alpha\) be an arbitrary ordinal. Let \(\mathsf{CA}_n\) denote the class of cylindric algebras of dimension \(n\) and \(\sf RA\) denote the class of relation algebras.
Tarek Sayed Ahmed
doaj   +1 more source

Levels and sublevels of composition algebras [PDF]

open access: yes, 2007
Lewis' and Leep's bounds on the level and sublevel of quaternion algebras are extended to the class of composition algebras. Some simple constructions of composition algebras of known level values are given.
O'Shea, James
core   +1 more source

Elementary Lie Algebras and Lie A-Algebras. [PDF]

open access: yes, 2007
A finite-dimensional Lie algebra L over a field F is called elementary if each of its subalgebras has trivial Frattini ideal; it is an A-algebra if every nilpotent subalgebra is abelian. The present paper is primarily concerned with the classification of
Varea, Vicente R., Towers, David A.
core   +3 more sources

Solvable complemented Lie algebras. [PDF]

open access: yes, 2012
In this paper a characterisation is given of solvable complemented Lie algebras. They decompose as a direct sum of abelian subalgebras and their ideals relate nicely to this decomposition.
Towers, David A.
core   +2 more sources

On nilpotent filiform Lie algebras of dimension eight

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
The aim of this paper is to determine both the Zariski constructible set of characteristically nilpotent filiform Lie algebras g of dimension 8 and that of the set of nilpotent filiform Lie algebras whose group of automorphisms consists of unipotent ...
P. Barbari, A. Kobotis
doaj   +1 more source

The Subpower Membership Problem for Finite Algebras with Cube Terms [PDF]

open access: yesLogical Methods in Computer Science, 2019
The subalgebra membership problem is the problem of deciding if a given element belongs to an algebra given by a set of generators. This is one of the best established computational problems in algebra.
Andrei Bulatov   +2 more
doaj   +1 more source

Some results on pseudo MV-algebras with n-roots

open access: yesRatio Mathematica
The paper provides a study of pseudo MV-algebras with $n$-roots. We outline their main properties and establish that the class of MV-algebras with $n$-roots forms a variety.
Chen Xinrong, Hongxing Liu
doaj   +1 more source

Dually quasi-De Morgan Stone semi-Heyting algebras II. Regularity [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2014
This paper is the second of a two part series. In this Part, we prove, using the description of simples obtained in Part I, that the variety $mathbf{RDQDStSH_1}$ of regular dually quasi-De Morgan Stone semi-Heyting algebras of level 1 is the join of the ...
Hanamantagouda P. Sankappanavar
doaj  

Automated Generation of EQ-Algebras through Genetic Algorithms

open access: yesMathematics, 2021
This article introduces an approach to the automated generation of special algebras through genetic algorithms. These algorithms can be also used for a broader variety of applications in mathematics.
Hashim Habiballa   +2 more
doaj   +1 more source

On Endomorphisms of Algebraic Varieties

open access: yesInternational Mathematics Research Notices, 2021
Abstract Consider an endomorphism of an algebraic variety over an algebraically closed field of characteristic zero that is injective on the complement of a proper closed subvariety. We prove that such an endomorphism is an automorphism, provided the morphism is quasi-finite.
openaire   +2 more sources

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