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Displaying 601 – 620 of 738

Subspaces in abstract Stone duality.

Taylor, Paul (2002)

Theory and Applications of Categories [electronic only]

Super-De Morgan functions and free De Morgan quasilattices

Yuri Movsisyan, Vahagn Aslanyan (2014)

Open Mathematics

A De Morgan quasilattice is an algebra satisfying hyperidentities of the variety of De Morgan algebras (lattices). In this paper we give a functional representation of the free n-generated De Morgan quasilattice with two binary and one unary operations. Namely, we define the concept of super-De Morgan function and prove that the free De Morgan quasilattice with two binary and one unary operations on nfree generators is isomorphic to the De Morgan quasilattice of super-De Morgan functions of nvariables....

Sur la construction de certaines MS-algèbres

Blyth, T.S., Varlet, J.C. (1980)

Portugaliae mathematica

Sur l'axiome d'Ivo Thomas

Denise Becchio (1978)

Publications du Département de mathématiques (Lyon)

Sur les algèbres de Heyting symétriques

Monteiro, António (1980)

Portugaliae mathematica

Sur les treillis de Coxeter finis

C. Le Conte de Poly-Barbut (1994)

Mathématiques et Sciences Humaines

Björner (1984) a montré que l’ordre faible de Bruhat défini sur un groupe de Coxeter fini (Bourbaki 1969) est un treillis. Dans le cas du groupe symétrique $S n$ ce résultat (treillis permutoèdre) a été prouvé par Guilbaud-Rosenstiehl (1963). Dans ce papier nous montrons que des propriétés connues des treillis permutoèdres peuvent s’étendre à tous les treillis de Coxeter finis et qu’inversement des propriétés démontrées sur tous les Coxeter finis ont des retombées intéressantes sur les permutoèdres....

S-verklebte Summen von Verbänden.

Christan Herrmann (1973)

Mathematische Zeitschrift

Système déterminant de l'algèbre de Morgan libre sur un ensemble ordonné fini

Figallo, Aldo, Monteiro, Luiz (1981)

Portugaliae mathematica

$T_{2}$ -frames and almost compact frames

Jan Paseka, Bohumil Šmarda (1992)

Czechoslovak Mathematical Journal

$T_{2}$ -separation axioms on frames

Jan Paseka (1987)

Acta Universitatis Carolinae. Mathematica et Physica

$T$ -algebras of the monad $L$ -Fuzz

Joachim Machner (1985)

Czechoslovak Mathematical Journal

$T o p^{o p}$ is a quasi-variety

Michael Barr, M. Cristina Pedicchio (1995)

Cahiers de Topologie et Géométrie Différentielle Catégoriques

Tensor products of semilattices and distributive lattices.

G.A. Fraser (1976/1977)

Semigroup forum

The 0-distributivity in the class of subalgebra lattices of Heyting algebras and closure algebras

Luc Vrancken-Mawet (1987)

Commentationes Mathematicae Universitatis Carolinae

The algebra of first-order fuzzy logic

Esko Turunen (1992)

Kybernetika

The Chinese remainder theorem and sheaf representations

William Cornish (1977)

Fundamenta Mathematicae

The clean elements of the ring $ℛ (L)$

Ali Akbar Estaji, Maryam Taha (2024)

Czechoslovak Mathematical Journal

We characterize clean elements of $ℛ (L)$ and show that $α \in ℛ (L)$ is clean if and only if there exists a clopen sublocale $U$ in $L$ such that $𝔠_{L} (coz (α - 1)) \subseteq U \subseteq 𝔬_{L} (coz (α))$ . Also, we prove that $ℛ (L)$ is clean if and only if $ℛ (L)$ has a clean prime ideal. Then, according to the results about $ℛ (L),$ we immediately get results about $𝒞_{c} (L) .$

The coherent algebras in the varieties $K_{n, m}$ of Ockham algebras

Ramalho, Margarita (1993)

Portugaliae mathematica

The completely distributive lattice of machine invariant sets of infinite words

Aleksandrs Belovs, Jānis Buls (2007)

Discussiones Mathematicae - General Algebra and Applications

We investigate the lattice of machine invariant classes. This is an infinite completely distributive lattice but it is not a Boolean lattice. The length and width of it is c. We show the subword complexity and the growth function create machine invariant classes.

The distributivity property of valuation rings

Ján Mináč (1981)

Mathematica Slovaca

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