Results 11 to 20 of about 26,040 (302)

Some Properties of Lebesgue Fuzzy Metric Spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2021
In this paper, we establish a sequential characterisation of Lebesgue fuzzy metric and explore the relationship between Lebesgue, weak $G$-complete and compact fuzzy metric spaces.
Sugata Adhya, Atasi Deb Ray
doaj   +1 more source

UNIQUE FIXED POINT THEOREMS FOR CONTRACTIVE MAPS TYPE IN T 0 -QUASI-METRIC SPACES [PDF]

open access: yes, 2014
In [2], Agyingi proved that every generalized contractive mapping defined in a q-spherically complete T 0 -ultra-quasi-metric space has a unique fixed point.
Yae ́ Ulrich Gaba
core   +1 more source

The metric completion of Outer Space [PDF]

open access: yesGeometriae Dedicata, 2019
We develop the theory of a metric completion of an asymmetric metric space. We characterize the points on the boundary of Outer Space that are in the metric completion of Outer Space with the Lipschitz metric. We prove that the simplicial completion, the subset of the completion consisting of simplicial tree actions, is homeomorphic to the free ...
openaire   +2 more sources

w-Distances on Fuzzy Metric Spaces and Fixed Points

open access: yesMathematics, 2020
We propose a notion of w-distance for fuzzy metric spaces, in the sense of Kramosil and Michalek, which allows us to obtain a characterization of complete fuzzy metric spaces via a suitable fixed point theorem that is proved here.
Salvador Romaguera
doaj   +1 more source

Some problems on selections for hyperspace topologies

open access: yesApplied General Topology, 2004
The theory of hyperspaces has attracted the attention of many mathematicians who have found a large variety of its applications during the last decades.
Valentin Gutev, Tsugunori Nogura
doaj   +1 more source

Formal Program Development with Approximations [PDF]

open access: yes, 2005
We describe a method for combining formal program development with a disciplined and documented way of introducing realistic compromises, for example necessitated by resource bounds.
Eerke A. Boiten   +3 more
core   +1 more source

Some ϕ-fixed point results in b-metric spaces with applications

open access: yesCumhuriyet Science Journal, 2019
The fixed point theory is the most important topic in mathematics anaysis. This topic has many applications in the different fields. It demonstrates the uniqueness of the existence of a mapping and how it can be found.
Müzeyyen Sangurlu Sezen
doaj   +1 more source

Coupled fractals in complete metric spaces

open access: yesNonlinear Analysis, 2018
The aim of this paper is to present fixed set theorems, collage type and anticollage type results for single-valued operators T : X × X → X in the framework of a complete metric space X.
Adrian Petru¸sel, Anna Soós
doaj   +1 more source

Dynamic Topological Logic of Metric Spaces [PDF]

open access: yes, 2012
Dynamic Topological Logic (DT L) is a modal framework for reasoning about dynamical systems, that is, pairs hX; fi where X is a topological space and f : X ! X a continuous function. In this paper we consider the case where X is a metric space.
Fernández Duque, David
core   +1 more source

Fixed point theorems for d-complete topological spaces I

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
Generalizations of Banach's fixed point theorem are proved for a large class of non-metric spaces. These include d-complete symmetric (semi-metric) spaces and complete quasi-metric spaces.
Troy L. Hicks
doaj   +1 more source

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