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1.
一类非线性算子的带误差的Ishikawa迭代程序及其稳定性   总被引:2,自引:0,他引:2  
建立了任意实Banach空间中带误差的Ishikawa迭代程序逼近Lipschitz强伪压缩算子的不动点的一般性定理,指出已被广泛广泛研究的Ishikawa迭代序列的稳定性问题仅是带误差的Ishikawa迭代程序的特例,作为直接的应用,用不同于通常的方法证得任意实Banach空间中的Ishikawa迭代序列关于Lipschitz强伪压缩算子是稳定的,这些推广或发展了近期许多相应的结果。  相似文献   

2.
王学武 《应用数学》2016,29(2):269-273
本文引入渐近$\phi-$半拟压缩算子, 研究此类算子的Mann型隐式迭代和 Ishikawa型混合迭代的收敛性, 改进、推广和完善了目前相关文献的主要结果.  相似文献   

3.
该文引入算子对的稳定性概念,在φ(x)/x非减的条件下,利用与以往文献不同的方法,研究了φ-半伪压缩算子对的Ishikawa型迭代序列的收敛性和稳定性.这些结果推广,改进和完善了迭代逼近理论的相关结果.  相似文献   

4.
本文引入渐近-半拟压缩算子,研究此类算子的Mann型隐式迭代和Ishikawa型混合迭代的收敛性,改进、推广和完善了目前相关文献的主要结果.  相似文献   

5.
关于渐近拟非扩张算子不动点迭代逼近的注记   总被引:5,自引:1,他引:4  
研究Banach空间中渐近拟非扩张算子及渐近φ-半压缩算子不动点的迭代逼近问题,给出带误差Ishikawa型迭代序列收敛的充要条件,所得结果修正与改进了[1]的主要结果,且推广了[2]及其他一些文献的相关结果。  相似文献   

6.
王学武  孙喜东 《应用数学》2015,28(2):275-279
在任意实Banach空间框架下,利用渐近Ф-半压缩映象概念,研究一类双算子的Ishikawa型迭代程序的稳定性,这些结果完善了迭代程序稳定性理论.  相似文献   

7.
在一致光滑Banach空间中,证明了广义LipschitzΦ-增生算子的带误差项的Ishikawa迭代序列强收敛于方程Tx=f的解,其结果改进和扩展了近期许多相关结果.并由此得出了Ishikawa迭代序列稳定性的一些结果.  相似文献   

8.
在迭代参数仅满足(?) supβ_n(k/L(L+1)),(?)α_n=0和(?)α_n=+∞的条件下,用不同与于已有的方法证明了任意实Banach空间中的Lipschitz强伪压缩算子的Mann迭代和具误差的Ishikawa迭代收敛是等价的.这推广和改进了目前需假设limβ_n=0和两迭代程序的初始点的取值需相同条件下的已知结果.  相似文献   

9.
本文结果表征了用于构造强增生算子方程解,m-增生算子方程解及强伪压缩算子不动点的(带误差的)Ishikawa型迭代序列的收敛性,推广与改进了Chidume与Osilike的定理1,定理2及定理3(Nonlinear Anal.TMA,1999,36(7):863-872)。  相似文献   

10.
本文引入Φ- 增生型算子———一类比重要的 φ- 强增生算子更一般的算子 ,并研究了Φ- 增生型算子方程解的存在性和带误差的Ishikawa迭代序列的收敛问题 .  相似文献   

11.
本文的目的是研究Lipschitz映射公共不动点问题.基于传统的Ishikawa迭代和Noor迭代方法,我们引入多步Ishikawa迭代算法,并且分别给出了该算法强收敛于有限族拟-Lipschitz映射和伪压缩映射公共不动点的充分必要条件.此外,我们证明了该算法强收敛到非扩张映射的公共不动点.作为应用,我们给出数值试验证实所得的结论.  相似文献   

12.
In this paper we prove some new equivalences between convergence of the Ishikawa and Mann iteration sequences with errors in two schemes by Xu [Y.G. Xu, Ishikawa and Mann iteration process with errors for nonlinear strongly accretive operator equations, J. Math. Anal. Appl. 224 (1998) 91-101] and Liu [L.S. Liu, Ishikawa and Mann iterative process with errors for nonlinear strongly accretive mappings in Banach spaces, J. Math. Anal. Appl. 194 (1995) 114-125], respectively, for strongly successively pseudocontractive mappings. Our main results improve and extend the corresponding results of the all references listed in this article.  相似文献   

13.
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   

14.
张丽娟  陈俊敏 《数学学报》2008,51(1):123-128
利用CQ方法修正了渐近非扩张映射的Ishikawa迭代,并证明修正迭代过程强收敛,此结果推广并改进了一些相关结论.  相似文献   

15.
Strong convergence theorems are obtained for the CQ method for an Ishikawa iteration process, a contractive-type iteration process for nonexpansive mappings, and the proximal point algorithm for maximal monotone operators in Hilbert spaces.  相似文献   

16.
In this paper, we introduce two modifications of the Ishikawa iteration, by using the hybrid methods, for asymptotically nonexpansive mappings and asymptotically nonexpansive semigroups in a Hilbert space. Then, we prove that such two sequences converge strongly to common fixed points of two symptotically nonexpansive mappings and asymptotically nonexpansive semigroups, respectively. Our main result is connected with the results of Plubtieng and Ungchittrakool [S. Plubtieng, K. Ungchittrakool, Strong convergence of modified Ishikawa iteration for two asymptotically nonexpansive mappings and semigroups, Nonlinear. Anal. 67(2007) 2306-2315], Martinez-Yanes and Xu [C. Martinez-Yanes, H.K. Xu, Strong convergence of CQ method for fixed point iteration processes, Nonlinear. Anal. 64 (2006) 2400-2411] and many others.  相似文献   

17.
In this paper, we introduce a modified Ishikawa iterative process for approximating a fixed point of nonexpansive mappings in Hilbert spaces. We establish some strong convergence theorems of the general iteration scheme under some mild conditions. The results improve and extend the corresponding results of many others.  相似文献   

18.
In this paper, we consider an Ishikawa type iteration process with errors to approximate the fixed point of two uniformly quasi-Lipschitzian mappings in convex metric spaces. Some results have been obtained which generalize and unify many important known results in recent literature.  相似文献   

19.
In this paper we establish a dual weak convergence theorem for the Ishikawa iteration process for nonexpansive mappings in a reflexive and strictly convex Banach space with a uniformly Gâteaux differentiable norm, and then apply this result to study the problem of the weak convergence of the iteration process.  相似文献   

20.
In this paper, the equivalence of the strong convergence between the modified Mann and Ishikawa iterations with errors in two different schemes by Xu [Y.G. Xu, Ishikawa and Mann iteration process with errors for nonlinear strongly accretive operator equations, J. Math. Anal. Appl. 224 (1998) 91-101] and Liu [L.S. Liu, Ishikawa and Mann iterative process with errors for nonlinear strongly accretive mappings in Banach spaces, J. Math. Anal. Appl. 194 (1995) 114-125] respectively is proven for the generalized strongly successively Φ-pseudocontractive mappings without Lipschitzian assumption. Our results generalize the recent results of the papers [Zhenyu Huang, F. Bu, The equivalence between the convergence of Ishikawa and Mann iterations with errors for strongly successively pseudocontractive mappings without Lipschitzian assumption, J. Math. Anal. Appl. 325 (1) (2007) 586-594; B.E. Rhoades, S.M. Soltuz, The equivalence between the convergences of Ishikawa and Mann iterations for an asymptotically nonexpansive in the intermediate sense and strongly successively pseudocontractive maps, J. Math. Anal. Appl. 289 (2004) 266-278; B.E. Rhoades, S.M. Soltuz, The equivalence between Mann-Ishikawa iterations and multi-step iteration, Nonlinear Anal. 58 (2004) 219-228] by extending to the most general class of the generalized strongly successively Φ-pseudocontractive mappings and hence improve the corresponding results of all the references given in this paper by providing the equivalence of convergence between all of these iteration schemes for any initial points u1, x1 in uniformly smooth Banach spaces.  相似文献   

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