Fixed Point Theorems and Applications

A special issue of Mathematics (ISSN 2227-7390).

Deadline for manuscript submissions: closed (30 June 2016) | Viewed by 28334

Special Issue Editor


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Guest Editor
Department of Mathematics and Computer Science, University of Palermo, Via Archirafi 34, 90123 Palermo, Italy
Interests: fixed point theory; general topology; operator theory; real functions

Special Issue Information

Dear Colleagues,

The aim of this Special Issue is to promote research and discussion on fixed points of mappings and operators. It will reflect on the status of theoretical research on fixed point theory and their advanced applications to the solution of practical problems. A particular attention will be given to results concerning the solvability of integro-differential equations and inclusions, of which advanced applications include fluid mechanics, viscoelasticity and many other physical phenomena.

Potential topics include, but are not limited to:

  • Fixed point theorems in abstract spaces.
  • Properties of the fixed point set: data dependence, stability, well posedness.
  • Integro-differential equations and applications.
  • Operator equations and inclusions in abstract spaces.

Prof. Dr. Pasquale Vetro
Guest Editor

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Keywords

  • Differential equations
  • Fixed points
  • Integral operators
  • Metric spaces
  • Operator inclusions

Published Papers (4 papers)

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Research

263 KiB  
Article
Fixed Points of Set Valued Mappings in Terms of Start Point on a Metric Space Endowed with a Directed Graph
by Murchana Neog and Pradip Debnath
Mathematics 2017, 5(2), 24; https://doi.org/10.3390/math5020024 - 19 Apr 2017
Cited by 6 | Viewed by 3563
Abstract
In the present article, we introduce the new concept of start point in a directed graph and provide the characterizations required for a directed graph to have a start point. We also define the notion of a self path set valued map and [...] Read more.
In the present article, we introduce the new concept of start point in a directed graph and provide the characterizations required for a directed graph to have a start point. We also define the notion of a self path set valued map and establish its relation with start point in the setting of a metric space endowed with a directed graph. Further, some fixed point theorems for set valued maps have been proven in this context. A version of the Knaster–Tarski theorem has also been established using our results. Full article
(This article belongs to the Special Issue Fixed Point Theorems and Applications)
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330 KiB  
Article
On Optimal Fuzzy Best Proximity Coincidence Points of Proximal Contractions Involving Cyclic Mappings in Non-Archimedean Fuzzy Metric Spaces
by Manuel De la Sen, Mujahid Abbas and Naeem Saleem
Mathematics 2017, 5(2), 22; https://doi.org/10.3390/math5020022 - 01 Apr 2017
Cited by 14 | Viewed by 3450
Abstract
The main objective of this paper is to deal with some properties of interest in two types of fuzzy ordered proximal contractions of cyclic self-mappings T integrated in a pair ( g , T ) of mappings. In particular, g is a non-contractive [...] Read more.
The main objective of this paper is to deal with some properties of interest in two types of fuzzy ordered proximal contractions of cyclic self-mappings T integrated in a pair ( g , T ) of mappings. In particular, g is a non-contractive fuzzy self-mapping, in the framework of non-Archimedean ordered fuzzy complete metric spaces and T is a p -cyclic proximal contraction. Two types of such contractions (so called of type I and of type II) are dealt with. In particular, the existence, uniqueness and limit properties for sequences to optimal fuzzy best proximity coincidence points are investigated for such pairs of mappings. Full article
(This article belongs to the Special Issue Fixed Point Theorems and Applications)
231 KiB  
Article
A Generalization of b-Metric Space and Some Fixed Point Theorems
by Tayyab Kamran, Maria Samreen and Qurat UL Ain
Mathematics 2017, 5(2), 19; https://doi.org/10.3390/math5020019 - 23 Mar 2017
Cited by 218 | Viewed by 15739
Abstract
In this paper, inspired by the concept of b-metric space, we introduce the concept of extended b-metric space. We also establish some fixed point theorems for self-mappings defined on such spaces. Our results extend/generalize many pre-existing results in literature. Full article
(This article belongs to the Special Issue Fixed Point Theorems and Applications)
241 KiB  
Article
A New Approach to Study Fixed Point of Multivalued Mappings in Modular Metric Spaces and Applications
by Dilip Jain, Anantachai Padcharoen, Poom Kumam and Dhananjay Gopal
Mathematics 2016, 4(3), 51; https://doi.org/10.3390/math4030051 - 08 Aug 2016
Cited by 14 | Viewed by 4296
Abstract
The purpose of this paper is to present a new approach to study the existence of fixed points for multivalued F-contraction in the setting of modular metric spaces. In establishing this connection, we introduce the notion of multivalued F-contraction and prove [...] Read more.
The purpose of this paper is to present a new approach to study the existence of fixed points for multivalued F-contraction in the setting of modular metric spaces. In establishing this connection, we introduce the notion of multivalued F-contraction and prove corresponding fixed point theorems in complete modular metric space with some specific assumption on the modular. Then we apply our results to establish the existence of solutions for a certain type of non-linear integral equations. Full article
(This article belongs to the Special Issue Fixed Point Theorems and Applications)
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