Results 11 to 20 of about 89,240 (119)

Kernels of Residuated Maps as Complete Congruences in Lattices

open access: yesInternational Journal of Computational Intelligence Systems, 2020
In a context of lattice-valued functions (also called lattice-valued fuzzy sets), where the codomain is a complete lattice L, an equivalence relation defined on L by the equality of related cuts is investigated.
Branimir Šešelja, Andreja Tepavčević
doaj   +1 more source

On a complete lattice of retracts of a free monoid generated by three elements [PDF]

open access: yesOpuscula Mathematica, 2008
We prove that the family of retracts of a free monoid generated by three elements, partially ordered with respect to the inclusion, is a complete lattice.
Wit Foryś
doaj  

Lattice of compactifications of a topological group [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2019
We show that the lattice of compactifications of a topological group $G$ is a complete lattice which is isomorphic to the lattice of all closed normal subgroups of the Bohr compactification $bG$ of $G$.
Wei He, Zhiqiang Xiao
doaj  

Quotients and subalgebras of sup-algebras; pp. 311–322 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2015
An ordered algebra is called a sup-algebra if its underlying poset is a complete lattice and its operations are compatible with joins in each variable. In this article we study quotients and subalgebras of sup-algebras.
Xia Zhang, Valdis Laan
doaj   +1 more source

A new view of relationship between atomic posets and complete (algebraic) lattices

open access: yesOpen Mathematics, 2017
In the context of the atomic poset, we propose several new methods of constructing the complete lattice and the algebraic lattice, and the mutual decision of relationship between atomic posets and complete lattices (algebraic lattices) is studied.
Yu Bin, Li Qingguo, Wu Huanrong
doaj   +1 more source

On sublattices of the lattice of all ω-composition formations of finite groups [PDF]

open access: yesAdvances in Group Theory and Applications, 2018
It is proved that the lattice of all ω-local formations is a complete sublattice of the lattice of all ω-composition formations of finite groups.
Nikolay N. Vorob’ev
doaj   +1 more source

On categorical aspects of S -quantales

open access: yesOpen Mathematics, 2018
S-quantales are characterized as injective objects in the category of S-posets with respect to certain class of homomorphisms that are order-preserving mappings. This paper is devoted to exhibitions of categorical structures on S-quantales.
Zhang Xia, Zhou Yunyan
doaj   +1 more source

The Lattice Structures of Approximation Operators Based on L-Fuzzy Generalized Neighborhood Systems

open access: yesComplexity, 2021
Following the idea of L-fuzzy generalized neighborhood systems as introduced by Zhao et al., we will give the join-complete lattice structures of lower and upper approximation operators based on L-fuzzy generalized neighborhood systems. In particular, as
Qiao-Ling Song   +5 more
doaj   +1 more source

Lattices of fuzzy objects

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
The collection of fuzzy subsets of a set X forms a complete lattice that extends the complete lattice 𝒫(X) of crisp subsets of X. In this paper, we interpret this extension as a special case of the “fuzzification” of an arbitrary complete lattice A. We
Arturo A. L. Sangalli
doaj   +1 more source

Latent Complete-Lattice Structure of Hilbert-Space Projectors

open access: yesQuanta, 2019
To uncover the hidden complete-lattice structure of Hilbert-space projectors, which is not seen by the operator operations and relations (algebraically), resort is taken to the ranges of projectors (to subspaces—to geometry).
Fedor Herbut
doaj   +1 more source

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