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Aggregation operators on partially ordered sets and their categorical foundations

Mustafa Demirci (2006)

Kybernetika

In spite of increasing studies and investigations in the field of aggregation operators, there are two fundamental problems remaining unsolved: aggregation of L -fuzzy set-theoretic notions and their justification. In order to solve these problems, we will formulate aggregation operators and their special types on partially ordered sets with universal bounds, and introduce their categories. Furthermore, we will show that there exists a strong connection between the category of aggregation operators...

Almost orthogonality and Hausdorff interval topologies of atomic lattice effect algebras

Jan Paseka, Zdena Riečanová, Junde Wu (2010)

Kybernetika

We prove that the interval topology of an Archimedean atomic lattice effect algebra E is Hausdorff whenever the set of all atoms of E is almost orthogonal. In such a case E is order continuous. If moreover E is complete then order convergence of nets of elements of E is topological and hence it coincides with convergence in the order topology and this topology is compact Hausdorff compatible with a uniformity induced by a separating function family on E corresponding to compact and cocompact elements....

Almost π -lattices

C. Jayaram (2004)

Czechoslovak Mathematical Journal

In this paper we establish some conditions for an almost π -domain to be a π -domain. Next π -lattices satisfying the union condition on primes are characterized. Using these results, some new characterizations are given for π -rings.

An investigation on hyperS-posets over ordered semihypergroups

Jian Tang, Bijan Davvaz, Xiang-Yun Xie (2017)

Open Mathematics

In this paper, we define and study the hyper S-posets over an ordered semihypergroup in detail. We introduce the hyper version of a pseudoorder in a hyper S-poset, and give some related properties. In particular, we characterize the structure of factor hyper S-posets by pseudoorders. Furthermore, we introduce the concepts of order-congruences and strong order-congruences on a hyper S-poset A, and obtain the relationship between strong order-congruences and pseudoorders on A. We also characterize...

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