Convergence of approximants to fixed points of nonexpansive nonlinear mappings in banach spaces

1967 ◽  
Vol 24 (1) ◽  
pp. 82-90 ◽  
Author(s):  
Felix E. Browder
Keyword(s):  
Fixed Points ◽  
Banach Spaces ◽  
Nonlinear Mappings

scholarly journals Nearly Contraction Mapping Principle for Fixed Points of Hemicontinuous Mappings

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Xavier Udo-utun ◽  
M. Y. Balla ◽  
Z. U. Siddiqui
Keyword(s):  
Fixed Points ◽  
Banach Spaces ◽  
Iterative Process ◽  
Contraction Mapping ◽  
Contraction Mapping Principle ◽  
Nonlinear Mappings

We extend the application of nearly contraction mapping principle introduced by Sahu (2005) for existence of fixed points of demicontinuous mappings to certain hemicontinuous nearly Lipschitzian nonlinear mappings in Banach spaces. We have applied certain results due to Sahu (2005) to obtain conditions for existence—and to introduce an asymptotic iterative process for construction—of fixed points of these hemicontractions with respect to a new auxiliary operator.

scholarly journals Approximating fixed points of enriched nonexpansive mappings in Banach spaces by using a retraction-displacement condition

2020 ◽  
Vol 36 (1) ◽  
pp. 27-34 ◽  
Author(s):  
VASILE BERINDE
Keyword(s):  
Hilbert Space ◽  
Fixed Point ◽  
Fixed Points ◽  
Banach Spaces ◽  
Iterative Algorithm ◽  
Hilbert Spaces ◽  
Nonexpansive Mappings ◽  
Convergence Theorems ◽  
Displacement Condition ◽  
Nonlinear Mappings

In this paper, we prove convergence theorems for a fixed point iterative algorithm of Krasnoselskij-Mann typeassociated to the class of enriched nonexpansive mappings in Banach spaces. The results are direct generaliza-tions of the corresponding ones in [Berinde, V.,Approximating fixed points of enriched nonexpansive mappings byKrasnoselskij iteration in Hilbert spaces, Carpathian J. Math., 35 (2019), No. 3, 293–304.], from the setting of Hilbertspaces to Banach spaces, and also of some results in [Senter, H. F. and Dotson, Jr., W. G.,Approximating fixed pointsof nonexpansive mappings, Proc. Amer. Math. Soc.,44(1974), No. 2, 375–380.], [Browder, F. E., Petryshyn, W. V., Construction of fixed points of nonlinear mappings in Hilbert space, J. Math. Anal. Appl., 20 (1967), 197–228.], byconsidering enriched nonexpansive mappings instead of nonexpansive mappings. Many other related resultsin literature can be obtained as particular instances of our results.

scholarly journals COMMON FIXED POINTS FOR SEMIGROUPS OF POINTWISE LIPSCHITZIAN MAPPINGS IN BANACH SPACES

2011 ◽  
Vol 84 (3) ◽  
pp. 353-361 ◽  
Author(s):  
W. M. KOZLOWSKI
Keyword(s):  
Banach Space ◽  
Fixed Points ◽  
Banach Spaces ◽  
Convex Subset ◽  
Common Fixed Points ◽  
Convex Banach Space ◽  
Uniformly Convex Banach Space ◽  
Uniformly Convex ◽  
Lipschitzian Mappings ◽  
Nonlinear Mappings

AbstractLet C be a bounded, closed, convex subset of a uniformly convex Banach space X. We investigate the existence of common fixed points for pointwise Lipschitzian semigroups of nonlinear mappings Tt:C→C, where each Tt is pointwise Lipschitzian. The latter means that there exists a family of functions αt:C→[0,∞) such that $\|T_t(x)-T_t(y)\| \leq \alpha _{t}(x)\|x-y\|$ for x,y∈C. We also demonstrate how the asymptotic aspect of the pointwise Lipschitzian semigroups can be expressed in terms of the respective Fréchet derivatives.

On some algorithms in Banach spaces finding fixed points of nonlinear mappings

2009 ◽  
Vol 71 (9) ◽  
pp. 3964-3972 ◽  
Author(s):  
Grzegorz Lewicki ◽  
Giuseppe Marino
Keyword(s):  
Fixed Points ◽  
Banach Spaces ◽  
Nonlinear Mappings

MONOTONE LIPSCHITZIAN SEMIGROUPS IN BANACH SPACES

2018 ◽  
Vol 105 (3) ◽  
pp. 417-428 ◽  
Author(s):  
WOJCIECH M. KOZLOWSKI
Keyword(s):  
Dynamical Systems ◽  
Differential Equations ◽  
Fixed Points ◽  
Partial Order ◽  
Banach Spaces ◽  
Common Fixed Points ◽  
Nonexpansive Semigroups ◽  
Nonlinear Mappings

We prove the existence of common fixed points for monotone contractive and monotone nonexpansive semigroups of nonlinear mappings acting in Banach spaces equipped with partial order. We also discuss some applications to differential equations and dynamical systems.

scholarly journals Existence of fixed points of weak enriched nonexpansive mappings in Banach spaces

2021 ◽  
Vol 37 (2) ◽  
pp. 287-294
Author(s):  
SUTHEP SUANTAI ◽  
DAWAN CHUMPUNGAM ◽  
PANITARN SARNMETA
Keyword(s):  
Fixed Point ◽  
Fixed Points ◽  
Banach Spaces ◽  
Hilbert Spaces ◽  
Fixed Point Theorems ◽  
Nonexpansive Mappings ◽  
New Class ◽  
Nonlinear Mappings

In this work, we introduce and study a new class of weak enriched nonexpasive mappings which is a generalization of enriched nonexpansive mappings provided by Berinde [Approximating fixed points of enriched nonexpansive mappings by Krasnoselskij iteration in Hilbert spaces], Carpathian J. Math., 35 (2019), No. 3, 293–304]. This class of mappings generalizes several important classes of nonlinear mappings. We prove some fixed point theorems regarding this kind of mappings which extend some important results in [Berinde, V., Approximating fixed points of enriched nonexpansive mappings by Krasnoselskij iteration in Hilbert spaces, Carpathian J. Math., 35 (2019), No. 3, 293–304]. Moreover, some examples, to ensure the existence of these mappings and support our main theorems, are also given.

On $\alpha$-nonexpansive mapping and fixed-points in Banach spaces

2018 ◽  
Vol 2018 (-) ◽  
Author(s):  
Prondanai Kaskasem ◽  
Chakkrid Klin-eam ◽  
Suthep Suantai
Keyword(s):  
Nonexpansive Mapping ◽  
Fixed Points ◽  
Banach Spaces
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