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A Few Notes on Formal Balls [PDF]

open access: yesLogical Methods in Computer Science, 2017
Using the notion of formal ball, we present a few new results in the theory of quasi-metric spaces. With no specific order: every continuous Yoneda-complete quasi-metric space is sober and convergence Choquet-complete hence Baire in its $d$-Scott ...
Jean Goubault-Larrecq, Kok Min Ng
doaj   +3 more sources

A Universal Separable Diversity

open access: yesAnalysis and Geometry in Metric Spaces, 2017
The Urysohn space is a separable complete metric space with two fundamental properties: (a) universality: every separable metric space can be isometrically embedded in it; (b) ultrahomogeneity: every finite isometry between two finite subspaces can be ...
Bryant David, Nies André, Tupper Paul
doaj   +2 more sources

NONSTANDARD COMPLETION OF NON-COMPLETE METRIC SPACE

open access: yesZanco Journal of Pure and Applied Sciences, 2021
Our aim in this study is to establishing nonstandard foundations, definitions and theorems for completion a noncomplete metric spaces. We have a lot of space or sets X which agree with all usual properties of complete, except at a small size subset of it.
Ala Omer Hassan, Ibrahim Othman Hamad
doaj   +3 more sources

Rational Geraghty Contractive Mappings and Fixed Point Theorems in Ordered $b_2$-metric Spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2019
In 2014, Zead Mustafa introduced $b_2$-metric spaces, as a generalization of both $2$-metric and $b$-metric spaces. Then new fixed point results for the classes of  rational Geraghty contractive mappings of type I,II and III in the setup of $b_2$-metric ...
Roghaye Jalal Shahkoohi, Zohreh Bagheri
doaj   +1 more source

The Hausdorff Algebra Fuzzy Distance and its Basic Properties [PDF]

open access: yesEngineering and Technology Journal, 2021
In this article we recall the definition of algebra fuzzy metric space and its basic properties. In order to introduced the Hausdorff algebra fuzzy metric from fuzzy compact set to another fuzzy compact set we define the algebra fuzzy distance between ...
Zainab Khudhair, Jehad Kider
doaj   +1 more source

Interpolative Ćirić-Reich-Rus-type best proximity point results with applications

open access: yesAIMS Mathematics, 2022
In this paper, we introduce the notion of ω-interpolative Ćirić-Reich-Rus-type proximal contraction. We obtain some best proximity point results for these mappings using the concept of ω-admissibility in complete metric spaces.
Naeem Saleem   +3 more
doaj   +1 more source

The Completion of Generalized 2-Inner Product Spaces

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2023
A complete metric space is a well-known concept. Kreyszig shows that every non-complete metric space  can be developed into a complete metric space , referred to as completion of . We use the b-Cauchy sequence to form  which “is the set of all b-Cauchy
Safa L. Hamad, Zeana Z. Jamil
doaj   +1 more source

STATISTICAL CONVERGENCE IN A BICOMPLEX VALUED METRIC SPACE

open access: yesUral Mathematical Journal, 2023
In this paper, we study some basic properties of bicomplex numbers. We introduce two different types of partial order relations on bicomplex numbers, discuss bicomplex valued metric spaces with respect to two different partial orders, and compare them ...
Subhajit Bera, Binod Chandra Tripathy
doaj   +1 more source

Complete metric in the space of discontinuous functions

open access: yesLietuvos Matematikos Rinkinys, 2000
Complete metrics in the subspaces Dα, α > 0 of D[0, 1] which were introduced in [2] are given. These metrics are equivalent to the metrics dα defined in [2] and are stronger than the well­known metric d in D[0,1] given in [1].
Rimas Banys
doaj   +3 more sources

Ordered Sp $S_{p}$-metric spaces and some fixed point theorems for contractive mappings with application to periodic boundary value problems

open access: yesFixed Point Theory and Applications, 2019
In this paper, we introduce the structure of Sp $S_{p}$-metric spaces as a generalization of both S-metric and Sb $S_{b}$-metric spaces. Also, we present the notions of S̃-contractive mappings in the setup of ordered Sp $S_{p}$-metric spaces and ...
Z. Mustafa   +4 more
doaj   +1 more source

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