Results 31 to 40 of about 167 (147)

Some remarks on certain classes of semilattices

International Journal of Mathematics and Mathematical Sciences, 1982
In this paper the concept of a ∗-semilattice is introduced as a generalization to distributive ∗-lattice first introduced by Speed [1]. It is shown that almost all the results of Speed can be extended to a more eneral class of distributive ∗-semilattices.
P. V. Ramana Murty, M. Krishna Murty
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Strong endomorphism kernel property for finite Brouwerian semilattices and relative Stone algebras [PDF]

Mathematica Bohemica
We show that all finite Brouwerian semilattices have strong endomorphism kernel property (SEKP), give a new proof that all finite relative Stone algebras have SEKP and also fully characterize dual generalized Boolean algebras which possess SEKP.
Jaroslav Guričan, Heghine Ghumashyan
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SEMILATTICES AND K-FINITE OBJECTS

Revista de Matemática: Teoría y Aplicaciones, 2017
We prove that for X Є  ǀ E ǀ, E elementary topos, the following properties are equivalent: (a) X is K-finite, (b) for every upper semilattice B, the diagonal B → BX has a left adjoint.
OSVALDO ACUÑA ORTEGA
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Locality and Applications to Subsumption Testing in EL and Some of its Extensions [PDF]

Scientific Annals of Computer Science, 2013
In this paper we show that subsumption problems in the description logics {{mathcal|EL}} and EL+ can be expressed as uniform word problems in classes of semilattices with monotone operators.
V. Sofronie-Stokkermans
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Completely cyclic injective semilattices [PDF]

Proceedings of the American Mathematical Society, 1972
We characterize semilattices S with identity for which every cyclic S-system is injective. We note that this condition, unlike the R-module case, is not equivalent to the condition that every S-system is injective.
Johnson, C. S. jun., McMorris, F. R.
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Neutrosophic Semilattices and Their Properties [PDF]

Neutrosophic Sets and Systems, 2015
In this paper, authors study neutrosophic semilattices and their properties. Application of these concepts is also discussed in this paper..
M. Reehana Parveen, P.Sekar
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Relatively pseudocomplemented posets [PDF]

Mathematica Bohemica, 2018
We extend the notion of a relatively pseudocomplemented meet-semilattice to arbitrary posets. We show some properties of the binary operation of relative pseudocomplementation and provide some corresponding characterizations.
Ivan Chajda, Helmut Länger
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MINIMAL EXPANSIONS OF SEMILATTICES [PDF]

International Journal of Algebra and Computation, 2004
We determine the minimal extension of the sequence <0,1,1,…,1,2>. This completes and extends the work of Koh, started in 1970, and solves Problem 15 in the survey on pn-sequences and free spectra [4]. The results involve the investigation of some minimal expansions of semilattices.
Jipsen, P., Kisielewicz, A.
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Relative annihilator-preserving congruence relations and relative annihilator-preserving homomorphisms in bounded distributive semilattices

Open Mathematics, 2014
In this paper we shall study a notion of relative annihilator-preserving congruence relation and relative annihilator-preserving homomorphism in the class of bounded distributive semilattices. We shall give a topological characterization of this class of
Celani Sergio A.
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Orbital Semilattices

, 2022
Orbital semilattices are introduced as bounded semilattices that are, in addition, equipped with an outer multiplication (a semigroup action) and diagonals (a concept borrowed from cylindric algebra), where each semilattice element has a certain domain.
Kötters, Jens, Schmidt, Stefan E.
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