Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces

Let be a real reflexive Banach space with a weakly continuous duality mapping . Let be a nonempty weakly closed star-shaped (with respect to ) subset of . Let  =  be a uniformly continuous semigroup of asymptotically nonexpansive self-mappings of , which is uniformly continuous at zero. We will sh...

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Main Authors: D. R. Sahu, Ngai-Ching Wong, Jen-Chih Yao
Format: Article
Language:English
Published: Wiley 2013-01-01
Series:Abstract and Applied Analysis
Online Access:http://dx.doi.org/10.1155/2013/202095
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author D. R. Sahu
Ngai-Ching Wong
Jen-Chih Yao
author_facet D. R. Sahu
Ngai-Ching Wong
Jen-Chih Yao
author_sort D. R. Sahu
collection DOAJ
description Let be a real reflexive Banach space with a weakly continuous duality mapping . Let be a nonempty weakly closed star-shaped (with respect to ) subset of . Let  =  be a uniformly continuous semigroup of asymptotically nonexpansive self-mappings of , which is uniformly continuous at zero. We will show that the implicit iteration scheme: , for all , converges strongly to a common fixed point of the semigroup for some suitably chosen parameters and . Our results extend and improve corresponding ones of Suzuki (2002), Xu (2005), and Zegeye and Shahzad (2009).
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spelling doaj-art-fb19a1d65989446ea0b0be1c582e6f442025-08-20T03:25:56ZengWileyAbstract and Applied Analysis1085-33751687-04092013-01-01201310.1155/2013/202095202095Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach SpacesD. R. Sahu0Ngai-Ching Wong1Jen-Chih Yao2Department of Mathematics, Banaras Hindu University, Varanasi 221005, IndiaDepartment of Applied Mathematics, National Sun Yat-Sen University, Kaohsiung 804, TaiwanCenter for Fundamental Science, Kaohsiung Medical University, Kaohsiung 807, TaiwanLet be a real reflexive Banach space with a weakly continuous duality mapping . Let be a nonempty weakly closed star-shaped (with respect to ) subset of . Let  =  be a uniformly continuous semigroup of asymptotically nonexpansive self-mappings of , which is uniformly continuous at zero. We will show that the implicit iteration scheme: , for all , converges strongly to a common fixed point of the semigroup for some suitably chosen parameters and . Our results extend and improve corresponding ones of Suzuki (2002), Xu (2005), and Zegeye and Shahzad (2009).http://dx.doi.org/10.1155/2013/202095
spellingShingle D. R. Sahu
Ngai-Ching Wong
Jen-Chih Yao
Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces
Abstract and Applied Analysis
title Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces
title_full Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces
title_fullStr Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces
title_full_unstemmed Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces
title_short Strong Convergence Theorems for Semigroups of Asymptotically Nonexpansive Mappings in Banach Spaces
title_sort strong convergence theorems for semigroups of asymptotically nonexpansive mappings in banach spaces
url http://dx.doi.org/10.1155/2013/202095
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AT ngaichingwong strongconvergencetheoremsforsemigroupsofasymptoticallynonexpansivemappingsinbanachspaces
AT jenchihyao strongconvergencetheoremsforsemigroupsofasymptoticallynonexpansivemappingsinbanachspaces