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渐近非扩张型映象不动点具误差的迭代逼近 总被引:4,自引:0,他引:4
本文在一致凸Banach空间中给出几个具误差的渐近非扩张型映象的不动点的迭代逼近定理,这些定理改进和扩展了最近一些文献的相关结果,所用的证明方法也不同。 相似文献
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Banach空间中渐近非扩张型映象的Ishikawa迭代序列的收敛问题 总被引:3,自引:0,他引:3
文章研究了Banach空间中渐近非扩张型映象的具误差的修正Ishikawa迭代序列的收敛问题,所得结果改进和发展了文献[1-6]的相关结果。 相似文献
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Banach空间中带误差的修改的Ishikawa迭代程序 总被引:12,自引:1,他引:11
本文研究在任意的实Banach空间中用带误差的修改的Ishikawa迭代序列来逼近一致Lipschitz的渐近伪压缩映象的不动点的问题.在去掉限制limn→∞βn=0之下,证明了张石生教授的结果(见文[1])仍真.另一方面,也把他的结果推广到了带误差的修改的Ishikawa迭代序列的情形. 相似文献
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在一般的实Banach空间中,研究Lipschitz渐近伪压缩映象和渐近非扩张映象不动点的迭代逼近问题.给出Ishikawa迭代序列强收敛的充要条件,所得结果改进和推广了张石生,肖建中等人的主要结果,修正和推广了朱玲娣等人的相应结果. 相似文献
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研究了Banach空间中几乎渐近非扩张型映象不动点的迭代逼近问题,所得结果发展和改进了张石生教授,曾六川教授等人的一些最新成果. 相似文献
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本文研究了一类涉及渐近拟非扩张型映象的带误改进Mann迭代序列,利用Tan和Xu的不等式,得到了该带误差Mann迭代序列的稳定性,推广了其他人的结果. 相似文献
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在Banach空间中引入渐近非扩张映象和非扩张映象某些类型的具误差的迭代序列,并研究了这些迭代序列的收敛性问题.本文的结果改进、推广和完善了最新的一些结果. 相似文献
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Iterative sequences with mixed errors for asymptotically quasi-nonexpansive type mappings in Banach spaces 总被引:1,自引:0,他引:1
The purpose of this paper is to study necessary and sufficient conditions for the Ishikawa iterative sequence with mixed errors
of asymptotically quasi-nonexpansive type mappings in Banach spaces to converge to a fixed point in Banach spaces. The results
presented in this paper complememt, improve and prefect the corresponding results of [1]–[4] and [7]–[9].
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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Ljubomir B. Ćirić 《Czechoslovak Mathematical Journal》1999,49(4):891-899
In this paper a new class of self-mappings on metric spaces, which satisfy the nonexpensive type condition (3) below is introduced and investigated. The main result is that such mappings have a unique fixed point. Also, a remetrization theorem, which is converse to Banach contraction principle is given.27. march 80 相似文献
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渐近伪压缩和渐近非扩张映像不动点的迭代逼近问题 总被引:1,自引:0,他引:1
研究了Banach空间中渐近伪压缩和渐近非扩张映像不动点的迭代逼近问题,改进和发展了张石生教授等人的相应结果. 相似文献
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Let C be a nonempty closed convex subset of a real Banach space E. Let S : C→ C be a quasi-nonexpansive mapping, let T : C→C be an asymptotically demicontractive and uniformly Lipschitzian mapping, and let F := {x ∈C : Sx = x and Tx = x}≠Ф Let {xn}n≥0 be the sequence generated irom an arbitrary x0∈Cby xn+i=(1-cn)Sxn+cnT^nxn, n≥0.We prove the necessary and sufficient conditions for the strong convergence of the iterative sequence {xn} to an element of F. These extend and improve the recent results of Moore and Nnoli. 相似文献
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首先给出了渐近伪压缩映射的黏滞近似不动点序列的新定义,继而证明了如下逼近定理:令K为实Banach空间E的非空闭凸有界子集,T:K→K为一致L-Lipschitz、具数列{εn}的一致渐近正则、具数列{kn}的渐近伪压缩映射.假设迭代序列{xn}定义为:x1∈K,对n≥1,xn+1:=λnθnf(xn)+[1-λn(1+θn)]xn+λnTnxn,其中{λn},{θn}(0,1)且满足一定条件,则:当n→∞时,‖xn-Txn‖→0. 相似文献
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The purpose of this paper is to study a new two-step iterative scheme with mean errors of mixed type for two asymptotically nonexpansive self-mappings and two asymptotically nonexpansive nonself-mappin... 相似文献
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本文研究了一致凸Banach空间中渐近拟非扩展型映象和渐近非扩展型映象T的不动点的迭代逼近问题.利用范数不等式,在去掉[3]中一个较强条件的情况下,证明了T的具误差的Ishikawa迭代序列中收敛于T的某个不动点.所得定理推广和改进了已有的部分结果。 相似文献
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Strong convergence theorems for strictly asymptotically pseudocontractive mappings in Hilbert spaces
Shi Sheng Zhang 《数学学报(英文版)》2011,27(7):1367-1378
The purpose of this paper is by using CSQ method to study the strong convergence problem of iterative sequences for a pair of strictly asymptotically pseudocontractive mappings to approximate a common fixed point in a Hilbert space. Under suitable conditions some strong convergence theorems are proved. The results presented in the paper are new which extend and improve some recent results of Acedo and Xu [Iterative methods for strict pseudo-contractions in Hilbert spaces. Nonlinear Anal., 67(7), 2258??271 (2007)], Kim and Xu [Strong convergence of modified Mann iterations for asymptotically nonexpansive mappings and semigroups. Nonlinear Anal., 64, 1140??152 (2006)], Martinez-Yanes and Xu [Strong convergence of the CQ method for fixed point iteration processes. Nonlinear Anal., 64, 2400??411 (2006)], Nakajo and Takahashi [Strong convergence theorems for nonexpansive mappings and nonexpansive semigroups. J. Math. Anal. Appl., 279, 372??79 (2003)], Marino and Xu [Weak and strong convergence theorems for strict pseudocontractions in Hilbert spaces. J. Math. Anal. Appl., 329(1), 336??46 (2007)], Osilike et al. [Demiclosedness principle and convergence theorems for k-strictly asymptotically pseudocontractive maps. J. Math. Anal. Appl., 326, 1334??345 (2007)], Liu [Convergence theorems of the sequence of iterates for asymptotically demicontractive and hemicontractive mappings. Nonlinear Anal., 26(11), 1835??842 (1996)], Osilike et al. [Fixed points of demi-contractive mappings in arbitrary Banach spaces. Panamer Math. J., 12 (2), 77??8 (2002)], Gu [The new composite implicit iteration process with errors for common fixed points of a finite family of strictly pseudocontractive mappings. J. Math. Anal. Appl., 329, 766??76 (2007)]. 相似文献
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研究了Banach空间中有限个渐近伪压缩映射近迫点序列的收敛性问题,此结果推广了以前的结论. 相似文献