Results 21 to 30 of about 3,846,080 (206)
The Hausdorff–Pompeiu Distance in Gn-Menger Fractal Spaces
Mathematics, 2022 This paper introduces a complete Gn-Menger space and defines the Hausdorff–Pompeiu distance in the space. Furthermore, we show a novel fixed-point theorem for Gn-Menger-θ-contractions in fractal spaces.
Donal O’Regan +3 more
doaj +1 more source
Fixed point theorem by using ψ–contraction and (ϕ,φ)–contraction in probabilistic 2–metric spaces
Alexandria Engineering Journal, 2020 This research paper investigates and proves some theorems of the fixed point for self–mapping [T:X→X] under (ϕ,ψ)–contractive mappings and (ϕ,φ)–contractive mappings in Menger probabilistic 2–metric space.
H.M. Abu-Donia +2 more
doaj +1 more source
On the Menger covering property and $D$-spaces [PDF]
Proceedings of the American Mathematical Society, 2012 7 pages, to appear in Proc. Amer.
Repovs, Dusan, Zdomskyy, Lyubomyr
openaire +3 more sources
Common Fixed Point Theorems in Menger Probabilistic Quasimetric Spaces
Fixed Point Theory and Applications, 2009 We consider complete Menger probabilistic quasimetric space and prove common fixed point theorems for weakly compatible maps in this space.
Shaban Sedghi +2 more
doaj +2 more sources
[Letter from Max Menger to Carl Menger]
, 1908 Place of sender: Vienna1 leafHandwritten letter（カール・メンガー文庫の手沢本および関連資料のデジタル化公開）は公益財団法人図書館振興財団の2024年度の助成を受けて実施しています。Location of original: Center for Historical Social Science Literature, Hitotsubashi University44-
Menger, Max, 1838-1911
core +4 more sources
[Letter from Max Menger to Carl Menger]
, 1907 Place of sender: Vienna2 pages (1 sheet)Handwritten letter（カール・メンガー文庫の手沢本および関連資料のデジタル化公開）は公益財団法人図書館振興財団の2024年度の助成を受けて実施しています。Location of original: Center for Historical Social Science Literature, Hitotsubashi University44-
Menger, Max, 1838-1911
core +3 more sources
پژوهشهای ریاضی, 2021 In this paper, first by using the constructions of probabilistic b-metric Menger space and probabilistic metric like Menger space, we introduce probabilistic b-metric like Menger space and present some examples of it.
Mahnaz Khanehgir, Reza Allahyari
doaj
On spaces with star kernel Menger
Acta Mathematica Hungarica, 2023 Given a topological property $\mathcal{P}$, a space $X$ is called star-$\mathcal{P}$ if for any open cover $\mathcal{U}$ of the space $X$, there exists a set $Y\subseteq X$ with property $\mathcal{P}$ such that $St(Y,\mathcal{U})=X$; the set $Y$ is called a star kernel of the cover $\mathcal{U}$.
Casas-De La Rosa, J. +1 more
openaire +2 more sources
Products of general Menger spaces [PDF]
Topology and its Applications, 2019 We study products of general topological spaces with Menger's covering property, and its refinements based on filters and semifilters. To this end, we extend the projection method from the classic real line topology to the Michael topology. Among other results, we prove that, assuming \CH{}, every productively Lindelöf space is productively Menger, and
Szewczak, Piotr, Tsaban, Boaz
openaire +3 more sources
Products of Menger spaces: A combinatorial approach
Annals of Pure and Applied Logic, 2017 We construct Menger subsets of the real line whose product is not Menger in the plane. In contrast to earlier constructions, our approach is purely combinatorial. The set theoretic hypothesis used in our construction is far milder than earlier ones, and holds in all but the most exotic models of real set theory.
Piotr Szewczak, Boaz Tsaban
openaire +3 more sources