Results 41 to 50 of about 1,225 (183)

Characterization of Modular Join-Semilattices [PDF]

, 1970
In this paper we have proved a classical characterization of modular join-semilattices. We have also given some characterizations of modular ideals of join-semilattices through congruences. Key words: Join-semilattices; modular semilattices; distributive
MHB Arif, MR Talukder
core   +1 more source

On general n-ary hyperstructure semilattices [PDF]

Journal of Hyperstructures, 2016
In this paper, the n-ary hyperstructure will be applied to some aspects of lattice theory. We introduce the concepts of general n-ary hyperstructure semilattice ( or gnh-semilattice) and Gnh-subsemilattice, ideal of gnh-semilattice, gno-order, Gnoorder ...
Akbar Dehghan Nezhad, Najmeh Khajuee
doaj   +1 more source

On Graphs of Bounded Semilattices [PDF]

Mathematical Notes, 2020
totally revised! Comments are still welcomed!
Malakooti Rad, P., Nasehpour, P.
openaire   +2 more sources

Congruences on pseudocomplemented semilattices [PDF]

, 2000
It is known that congruence lattices of pseudocomplemented semilattices are pseudocomplemented [4]. Many interesting properties of congruences on pseudocomplemented semilattices were described by Sankappanavar in [4], [5], [6].
Heleyová, Zuzana
core   +1 more source

On the Equational Base of SMB Algebras

Mathematics, 2023
The “semilattices of Mal’cev blocks”, for short SMB algebras, were defined by A. Bulatov. In a recently accepted paper by P. Đapić, P. Marković, R. McKenzie, and A.
Petar Đapić, Sara Bačević, Fedor Kovačević   +2 more
doaj   +1 more source

Infinite Atomized Semilattices [PDF]

, 2023
We extend the theory of atomized semilattices to the infinite setting. We show that it is well-defined and that every semilattice is atomizable. We also study atom redundancy, focusing on complete and finitely generated semilattices and show that for ...
Mendez, David, Ricciardo, Antonio, Martin-Maroto, Fernando, de Polavieja, Gonzalo G.   +3 more
core   +1 more source

Monotone and cone preserving mappings on posets [PDF]

Mathematica Bohemica, 2023
We define several sorts of mappings on a poset like monotone, strictly monotone, upper cone preserving and variants of these. Our aim is to study in which posets some of these mappings coincide.
Ivan Chajda, Helmut Länger
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source

Polymorphism-homogeneity and universal algebraic geometry [PDF]

Discrete Mathematics & Theoretical Computer Science, 2022
We assign a relational structure to any finite algebra in a canonical way, using solution sets of equations, and we prove that this relational structure is polymorphism-homogeneous if and only if the algebra itself is polymorphism-homogeneous.
Endre Tóth, Tamás Waldhauser
doaj   +1 more source