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Banach空间非扩张映像不动点强收敛定理(英文)

Strong Convergence Theorems for Nonexpansive Mapping in Banach Spaces

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【作者】 苏永福张芳秦小龙

【Author】 SU Yong-fu,ZHANG Fang,QIN Xiao-long Department of Mathematics,Tianjin Polytechnic University,Tianjin 300160,China

【机构】 天津工业大学理学院数学系天津工业大学理学院数学系 天津 300160天津 300160

【摘要】 设E是具弱序列连续对偶映像自反Banach空间, C是E中闭凸集, T:C→ C是具非空不动点集F(T)的非扩张映像.给定u∈ C,对任意初值x0∈ C,实数列{αn}n∞=0,{βn}∞n=0∈ (0,1),满足如下条件:(i)sum from n=α to ∞αn=∞, αn→0;(ii)βn∈[0,α) for some α∈(0,1);(iii)sun for n=α to ∞|αn-1n|<∞,sum from n=α|βn-1n|<∞设{xn}n1是由下式定义的迭代序列:{ynnxn+(1-βn)Txn xn+1nu+(1-αn)yn Then {xn}n=1则{xn}n=1强收敛于T的某不动点.

【Abstract】 Assume E is a reflexive Banach space which has a weakly continuous duality map,C is a closed convex subset of E and let T:C→C be a nonexpansive mapping such that F(T)≠φ.Given a point u∈C,the initial guess x0∈C is chosen arbitrarily and given sequences {αn}∞n=0,{βn}∞n=0 in(0,1),the following conditions are satisfied(i)sum from n=α to ∞ αn=∞, αn→0;(ii)βn∈[0,α) for some α∈(0,1);(iii)sun for n=α to ∞|αn-1n|<∞,sum from n=α|βn-1n|<∞ Let {xn}n1 be composite process defined by{ynnxn+(1-βn)Txn xn+1nu+(1-αn)yn Then {xn}n=1 converges strongly to a fixed point of T.

【基金】 the National Natural Science Foundation of China(10471033)
  • 【文献出处】 应用泛函分析学报 ,Acta Analysis Functionalis Applicata , 编辑部邮箱 ,2007年03期
  • 【分类号】O177.91
  • 【被引频次】1
  • 【下载频次】71
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