Results 11 to 20 of about 140 (131)

(τ 1,τ 2)δ-semicontinuous multifunctions. [PDF]

open access: yesHeliyon, 2020
The purpose of the present article is to introduce the concepts of upper and lower (τ1,τ2)δ-semicontinuous multifunctions. Some characterizations of upper and lower (τ1,τ2)δ-semicontinuous multifunctions are investigated.
Boonpok C.
europepmc   +2 more sources

Some Results of τ1τ2-δ Semiconnectedness and Compactness in Bitopological Spaces

open access: yesJournal of Mathematics, 2018
We are going to establish some results of τ1τ2-δ semiconnectedness and compactness in a bitopological space. Besides, we will investigate several results in τ1τ2-δ semiconnectedness for subsets in bitopological spaces.
M. Arunmaran, K. Kannan
doaj   +2 more sources

On r-Compactness in Topological and Bitopological Spaces

open access: yesAxioms, 2023
This paper defines the so-called pairwise r-compactness in topological and bitopological spaces. In particular, several inferred properties of the r-compact spaces and their connections with other topological and bitopological spaces are studied ...
Jamal Oudetallah   +2 more
doaj   +2 more sources

A Note on Neutrosophic Bitopological Spaces [PDF]

open access: yesNeutrosophic Sets and Systems, 2020
In this paper, we have introduced the idea on neutrosophic bitopological space and studied its properties with examples. We have defined several definitions of neutrosophic interior, closure and boundary also we have studied all of its ...
Dimacha Dwibrang Mwchahary   +1 more
doaj   +3 more sources

Neutrosophic Bitopological Spaces [PDF]

open access: yesNeutrosophic Sets and Systems, 2019
In this study, bitopological structure which is a more general structure than topological spaces is built on neutrosophic sets. The necessary arguments which are pairwise neutrosophic open set, pairwise neutrosophic closed set, pairwise neutrosophic ...
Taha Yasin Ozturk, Alkan Ozkan
doaj   +3 more sources

On Cℵ-fibrations in bitopological semigroups. [PDF]

open access: yesScientificWorldJournal, 2014
We extend the path lifting property in homotopy theory for topological spaces to bitopological semigroups and we show and prove its role in the Cℵ‐fibration property. We give and prove the relationship between the Cℵ‐fibration property and an approximate fibration property. Furthermore, we study the pullback maps for Cℵ‐fibrations.
Dawood S, Kılıçman A.
europepmc   +2 more sources

Neutrosophic Fuzzy Pairwise Local Function and Its Application [PDF]

open access: yesNeutrosophic Sets and Systems, 2022
In this paper we introduce the notion of neutrosophic fuzzy bitopological ideals. The concept of neutrosophic fuzzy pairwise local function is also introduced here by utilizing the neutrosophic quasi-coincident neighbourhood structure in a neutrosophic ...
A. A. Salam   +2 more
doaj   +1 more source

Introduction to anti-bitopological spaces [PDF]

open access: yesNeutrosophic Sets and Systems, 2023
The main aim of this study is to introduce the notion of anti-bitopological space and to reintroduce some basic concepts of topology in this novel framework.
Jeevan Krishna Khaklary, Tomasz Witczak
doaj   +1 more source

[Retracted] Neutrosophic Soft Quad Structures Concerning Neutrosophic Soft Points

open access: yesMathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
In this article, a new concept of neutrosophic soft quad‐topological structures is introduced. Generalised neutrosophic soft ∗b open sets in neutrosophic soft quad‐topological structures concerning soft points of the space are introduced. Different results are addressed in neutrosophic soft quad‐topological structure on the basis of these new ...
Arif Mehmood   +5 more
wiley   +1 more source

Preopenness Degree in RL‐Fuzzy Bitopological Spaces

open access: yesAbstract and Applied Analysis, Volume 2022, Issue 1, 2022., 2022
Based on the concept of pseudocomplement, we introduce a new representation of preopenness of L‐fuzzy sets in RL‐fuzzy bitopological spaces. The concepts of pairwise RL‐fuzzy precontinuous and pairwise RL‐fuzzy preirresolute functions are extended and discussed based on the (i, j)‐RL‐preopen gradation.
O. H. Khalil   +3 more
wiley   +1 more source

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