Abstract
We apply a string-averaging algorithm for common fixed point problems with a countable family of quasi-nonexpansive operators in an arbitrary normed space and show its convergence. Our results are an extension of the recent results by T. Y. Kong, H. Pajoohesh and G. T. Herman obtained for operators which are projections on convex closed sets in a finite-dimensional Euclidean space.
References
- C. Bargetz, M. Dymond, E. Medjic, S. Reich: On the existence of fixed points for typical nonexpansive mappings on spaces with positive curvature, Topol. Methods Nonlinear Anal. 57 (2021) 621–634.https://doi.org/10.12775/TMNA.2020.040Google Scholar
- D. Butnariu, R. Davidi, G. T. Herman, I. G. Kazantsev: Stable convergence behavior under summable perturbations of a class of projection methods for convex feasibility and optimization problems, IEEE J. Selected Topics Signal Proc. 1 (2007) 540–547.https://doi.org/10.1109/JSTSP.2007.910263Google Scholar
- D. Butnariu, E. Resmerita: Bregman distances, totally convex functions, and a method for solving operator equations in Banach spaces, Abstr. Appl. Anal. (2006), art.no. 84919, 39p.https://doi.org/10.1155/AAA/2006/84919Google Scholar
- Y. Censor, T. Elfving, G. T. Herman: Averaging strings of sequential iterations for convex feasibility problems, in: Inherently Parallel Algorithms in Feasibility and Optimization and their Applications, D. Butnariu et al. eds., Studies in Computational Mathematics Vol. 8, North-Holland, Amsterdam (2001) 101–113.https://doi.org/10.1016/S1570-579X(01)80009-4Google Scholar
- Y. Censor, R. Davidi, G. T. Herman: Perturbation resilience and superiorization of iterative algorithms, Inverse Problems 26/6 (2010), art.no. 065008, 12p.https://doi.org/10.1088/0266-5611/26/6/065008Google Scholar
- Y. Censor, Y. Nisenbaum: String-averaging methods for best approximation to common fixed point sets of operators: the finite and infinite cases, Fixed Point Theory Alg. Sci. Eng. 2021 (2021), art.no. 9, 21p.https://doi.org/10.1186/s13663-021-00694-4Google Scholar
- Y. Censor, M. Zaknoon: Algorithms and convergence results of projection methods for inconsistent feasibility problems: a review, Pure Appl. Funct. Anal. 3 (2018) 565–586.Google Scholar
- B. Djafari-Rouhani, K. R. Kazmi, S. Moradi, R. Ali, S. A. Khan: Solving the split equality hierarchical fixed point problem, Fixed Point Theory 23 (2022) 351–369.https://doi.org/10.24193/fpt-ro.2022.1.22Google Scholar
- A. Gibali: A new split inverse problem and an application to least intensity feasible solutions, Pure Appl. Funct. Anal. 2 (2017) 243–258.Google Scholar
- A. Gibali, S. Reich, R. Zalas: Outer approximation methods for solving variational inequalities in Hilbert space, Optimization 66 (2017) 417–437.https://doi.org/10.1080/02331934.2016.1271800Google Scholar
- K. Goebel, W. A. Kirk: Topics in Metric Fixed Point Theory, Cambridge University Press, Cambridge (1990).https://doi.org/10.1017/CBO9780511526152Google Scholar
- K. Goebel, S. Reich; Uniform Convexity, Hyperbolic Geometry, and Nonexpansive Mappings, Marcel Dekker, New York (1984).Google Scholar
- L. G. Gurin, B. T. Poljak, E. V. Raik: Projection methods for finding a common point of convex sets, Zhurn. Vycisl. Mat. i Mat. Fiz. 7 (1967) 1211–1228.https://doi.org/10.1016/0041-5553(67)90113-9Google Scholar
- C. Izuchukwu, O. T. Mewomo: Iterative algorithms for a finite family of equilibrium problems and fixed point problem in an Hadamard space, Fixed Point Theory 24 (2023) 241–264.https://doi.org/10.24193/fpt-ro.2023.1.13Google Scholar
- E. Karapinar, Z. D. Mitrovic, A. Ozturk, S. Radenovic: On a theorem of Ciric in b-metric spaces, Rend. Circ. Mat. Palermo 70 (2021) 217–225.https://doi.org/10.1007/s12215-020-00491-9Google Scholar
- M. A. Khamsi, W. M. Kozlowski: Fixed Point Theory in Modular Function Spaces, Birkhäuser/Springer, Cham (2015).https://doi.org/10.1007/978-3-319-14051-3Google Scholar
- W. A. Kirk: Contraction mappings and extensions, in: Handbook of Metric Fixed Point Theory, W. A. Kirk et al. (eds.), Kluwer, Dordrecht (2001) 1–34.https://doi.org/10.1007/978-94-017-1748-9_1Google Scholar
- V. I. Kolobov, S. Reich, R. Zalas: Finitely convergent deterministic and stochastic iterative methods for solving convex feasibility problems, Math. Programming 194 (2022) 1163–1183.https://doi.org/10.1007/s10107-021-01628-zGoogle Scholar
- T. Y. Kong, H. Pajoohesh, G. T. Herman: String-averaging algorithms for convex feasibility with infinitely many sets, Inverse Problems 35 (2019), art.no. 045011, 37p.https://doi.org/10.1088/1361-6420/ab066cGoogle Scholar
- E. Kopecka, S. Reich: A note on alternating projections in Hilbert space, J. Fixed Point Theory Appl. 12 (2012) 41–47.https://doi.org/10.1007/s11784-013-0097-4Google Scholar
- R. Kubota, W. Takahashi, Y. Takeuchi: Extensions of Browder’s demiclosedness principle and Reich’s lemma and their applications, Pure Appl. Funct. Anal. 1 (2016) 63–84.Google Scholar
- F. Lenzen, F. Becker, J. Lellmann, S. Petra, Ch. Schnörr: A class of quasi-variational inequalities for adaptive image denoising and decomposition, Comput. Optim. Appl. 54 (2013) 371–398.https://doi.org/10.1007/s10589-012-9456-0Google Scholar
- S. Reich, T. M. Tuyen: Projection algorithms for solving the split feasibility problem with multiple output sets, J. Optim. Theory Appl. 190 (2021) 861–878.https://doi.org/10.1007/s10957-021-01910-2Google Scholar
- S. Reich, A. J. Zaslavski: Genericity in Nonlinear Analysis, Developments in Mathematics Vol. 34, Springer, New York (2014).https://doi.org/10.1007/978-1-4614-9533-8Google Scholar
- W. Takahashi: The split common fixed point problem and the shrinking projection method for new nonlinear mappings in two Banach spaces, Pure Appl. Funct. Anal. 2 (2017) 685–699.Google Scholar
- W. Takahashi: A general iterative method for split common fixed point problems in Hilbert spaces and applications, Pure Appl. Funct. Anal. 3 (2018) 349–369.Google Scholar
- A. J. Zaslavski: Approximate Solutions of Common Fixed Point Problems, Springer Optimization and its Applications, Springer, Cham (2016).https://doi.org/10.1007/978-3-319-33255-0Google Scholar
- A. J. Zaslavski: Algorithms for Solving Common Fixed Point Problems, Springer Optimization and its Applications, Springer, Cham (2018).https://doi.org/10.1007/978-3-319-77437-4Google Scholar
- A. J. Zaslavski: Solving feasibility problems with infinitely many sets, Axioms 12/3 (2023), art.no. 273, 12p.https://doi.org/10.3390/axioms12030273Google Scholar
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Published by Heldermann Verlag, 2025. Rights now held by Banach Press.
