Results 1 to 10 of about 523 (235)

The B-topology on S∗-doubly quasicontinuous posets [PDF]

open access: goldOpen Mathematics, 2021
The notions of os{o}_{s}-convergence and S∗{S}^{\ast }-doubly quasicontinuous posets are introduced, which can be viewed as common generalizations of Birkhoff’s order-convergence and S∗{S}^{\ast }-doubly continuous posets, respectively. We first consider
Sun Tao, Li Qingguo, Zou Zhiwei
doaj   +2 more sources

A study on strongly convex hyper S-subposets in hyper S-posets [PDF]

open access: goldOpen Mathematics, 2020
In this paper, we study various strongly convex hyper S-subposets of hyper S-posets in detail. To begin with, we consider the decomposition of hyper S-posets.
Tang Jian, Xie Xiang-Yun, Davvaz Bijan
doaj   +2 more sources

NETS AND SEPARATED S-POSETS [PDF]

open access: yesJournal of Algebraic Systems, 2013
Nets, useful topological tools, used to generalize certainconcepts that may only be general enough in the context of metricspaces. In this work we introduce this concept in an $S$-poset, aposet with an action of a posemigroup $S$ on it whichis a very ...
Mahdieh Haddadi
doaj   +3 more sources

An investigation on hyper S-posets over ordered semihypergroups

open access: goldOpen Mathematics, 2017
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.
Tang Jian, Davvaz Bijan, Xie Xiang-Yun
doaj   +3 more sources

A complete theoretical framework for inferring horizontal gene transfers using partial order sets. [PDF]

open access: yesPLoS ONE, 2023
We present a method for detecting horizontal gene transfer (HGT) using partial orders (posets). The method requires a poset for each species/gene pair, where we have a set of species S, and a set of genes G.
Nahla A Belal, Lenwood S Heath
doaj   +2 more sources

Axiomatisability problems for S-posets [PDF]

open access: closed, 2010
Let C be a class of algebras of a given fixed type t. Associated with the type is a first order language L_t. One can then ask the question, when is the class C axiomatisable by sentences of L_t.
Victoria Gould, Lubna Shaheen
openalex   +5 more sources

On homological classification of pomonoids by GP-po-flatness of S-posets

open access: goldOpen Mathematics, 2016
In this paper, we introduce GP-po-flatness property of S-posets over a pomonoid S, which lies strictly between principal weak po-flatness and po-torsion freeness.
Liang Xingliang   +2 more
doaj   +3 more sources

On (po-)torsion free and principally weakly (po-)flat $S$-posets [PDF]

open access: diamondCategories and General Algebraic Structures with Applications, 2018
In this paper, we first consider (po-)torsion free and principally weakly (po-)flat $S$-posets, specifically  we discuss when (po-)torsion freeness implies principal weak (po-)flatness.
Roghaieh Khosravi, Xingliang Liang
doaj   +3 more sources

Directed colimits of some flatness properties and purity of epimorphisms in S-posets

open access: goldOpen Mathematics, 2018
Let S be a pomonoid. In this paper, we introduce some new types of epimorphisms with certain purity conditions, and obtain equivalent descriptions of various flatness properties of S-posets, such as strong flatness, Conditions (E), (E′), (P), (Pw), (WP),
Liang Xingliang, Khosravi Roghaieh
doaj   +3 more sources

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