Results 51 to 60 of about 2,648,949 (108)
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019 The aim of this paper is to introduce Ciric-Suzuki type quasi-contractive multivalued operators and to obtain the existence of fixed points of such mappings in the framework of b-metric spaces.
Alolaiyan Hanan +2 more
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Jordan-von Neumann type constant and fixed points for multivalued nonexpansive mappings
, 2016 We give some sufficient conditions for the Domı́nguez-Lorenzo condition in terms of the Jordan-von Neumann type constant, and the coefficient of weak orthogonality.
Zhanfei Zuo +3 more
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Revisiting of some outstanding metric fixed point theorems via E-contraction
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2018 In this paper, we introduce the notion of α-ψ-contractive mapping of type E, to remedy of the weakness of the existing contraction mappings. We investigate the existence and uniqueness of a fixed point of such mappings.
Fulga Andreea, Karapınar Erdal
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Common fixed points for (ψ,α,β)-weakly contractive mappings in generalized metric spaces
, 2013 We establish some common fixed point theorems for mappings satisfying a (ψ,α,β)-weakly contractive condition in generalized metric spaces. Presented theorems extend and generalize many existing results in the literature.MSC: Primary 54H25; secondary ...
H. Işık, D. Türkoglu
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KKM and KY fan theorems in modular function spaces
Fixed Point Theory and Applications, 2011 In modular function spaces, we introduce Knaster-Kuratowski-Mazurkiewicz mappings (in short KKM-mappings) and prove an analogue to Ky Fan s fixed point theorem. 2010 Mathematics Subject Classification: Primary 46B20, 47H09; Secondary 47H10.
Latif Abdul +2 more
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Orthogonal stability of the generalized quadratic functional equations in the sense of Rätz
Demonstratio Mathematica, 2019 Let (X, ⊥) be an orthogonality module in the sense of Rätz over a unital Banach algebra A and Y be a real Banach module over A. In this paper, we apply the alternative fixed point theorem for proving the Hyers-Ulam stability of the orthogonally ...
Aiemsomboon Laddawan +1 more
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The modified Ishikawa iteration process with errors in CAT(0) spaces
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2020 In this article, Δ-convergence and strong convergence of the modified Ishikawa iteration process with errors are established for continuous mappings of asymptotically nonexpansive type in CAT(0) spaces. Our results extend and improve the previous results
Ranjbar Sajad
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On the set of common fixed points of semigroups of nonlinear mappings in modular function spaces
, 2014 We prove that the set of all common fixed points for a continuous nonexpansive semigroup of nonlinear mappings acting in modular function spaces can be represented as an intersection of fixed points sets of two nonexpansive mappings.
Saud M. Alsulami, W. Kozlowski
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Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014 In this paper, we study some tripled fixed and coincidence point theorems for two mappings F : X × X × X → X and ɡ : X → X satisfying a nonlinear contraction based on ϕ-maps. Our results extend and improve many existing results in the literature.
Shatanawi Wasfi +2 more
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N-fixed point theorems for nonlinear contractions in partially ordered metric spaces
, 2013 In present paper we introduce the concept of a new g-monotone mapping and define the notions of n-fixed point and n-coincidence point and prove some related theorems for nonlinear contractive mappings in partially ordered complete metric spaces.
M. Paknazar +3 more
semanticscholar +1 more source