نتایج جستجو برای: almost contraction mappings

تعداد نتایج: 278088  

Journal: :sahand communications in mathematical analysis 2015
hossein piri samira rahrovi

in this paper,  we introduce the notion of  generalized multivalued  $f$- weak contraction and we prove some fixed point theorems related to introduced  contraction for multivalued mapping in complete metric spaces.  our results extend and improve the results announced by many others with less hypothesis. also, we give some illustrative examples.

Journal: :Archiv der Mathematik 2004

Journal: :Symmetry 2023

The purpose of this paper is to present some new contraction mappings via control functions. In addition, fixed point results for Θ,α,θ,Ψ contraction, rational and almost are obtained. Moreover, under types (I), (II), (III) Θ,θ,Ψυ0, several circle solutions provided in the setting a G-Metric space. Our extend, unify, generalize many previously published papers direction. examples show reliabili...

Journal: :international journal of nonlinear analysis and applications 2015
masoud hadian dehkordi masoud ghods

in this paper, we introduce the (g-$psi$) contraction in a metric space by using a graph.let $f,t$ be two multivalued mappings on $x.$ among other things, we obtain a common fixedpoint of the mappings $f,t$ in the metric space $x$ endowed with a graph $g.$

Journal: :Colloquium Mathematicum 1978

Journal: :iranian journal of fuzzy systems 2014
h vosoughi s. j hosseini ghoncheh

in a fuzzy metric space (x;m; *), where * is a continuous t-norm,a locally fuzzy contraction mapping is de ned. it is proved that any locally fuzzy contraction mapping is a global fuzzy contractive. also, if f satis es the locally fuzzy contractivity condition then it satis es the global fuzzy contrac-tivity condition.

We discuss about the generalized $F$-contraction mappings in partially ordered metric spaces. For this, we first introduce the notion of ordered weakly $F$-contraction mapping. We also present some fixed point results about this type of mapping in partially ordered metric spaces. Next, we introduce the notion of $acute{mathrm{C}}$iri$acute{mathrm{c}}$ type generalized ordered weakly $F$-contrac...

Journal: :Communications in Mathematics and Applications 2022

In this paper, we established a new class of almost \((\alpha/\eta)\)-\(\psi_\Gamma\)-contraction mapping in induced fuzzy metric space (FMS) and then proved the results for existence fixed point theorem (FPT) multi-valued mappings (MVMs) on collection non-empty closed subsets. application, prove Fredholm integral inclusion (FII). An illustrative example also introduced support our main result.

Journal: :sahand communications in mathematical analysis 0
hamid faraji department of mathematics, science and research branch, islamic azad university, tehran, iran. kourosh nourouzi faculty of mathematics, k. n. toosi university of technology, p.o. box 16315-1618, tehran, iran.

in this paper, we give some results on the common fixed point of self-mappings defined on complete $b$-metric spaces. our results generalize kannan and chatterjea fixed point theorems on complete $b$-metric spaces. in particular, we show that two self-mappings satisfying a contraction type inequality have a unique common fixed point. we also give some examples to illustrate the given results.

2013
VASILE BERINDE MĂDĂLINA PĂCURAR Ioan A. Rus

Let X be a Banach space, K a non-empty closed subset of X and let T : K → X be a non-self almost contraction. The main result of this paper shows that if T has the so called property (M) and satisfies Rothe’s boundary condition, i.e., maps ∂K (the boundary of K) into K, then T has a fixed point in K. This theorem generalizes several fixed point theorems for non-self mappings and also extends se...

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