Abstract
We use a simple iterative algorithm for two quasi-nonexpansive mappings to approximate their common fixed point through \( \triangle \)-convergence and strong convergence of the algorithm. Our results are new in the literature of metrical fixed point theory and are also valid in CAT(0) spaces.
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References
Aoyama, K., Kohsaka, F.: Fixed point theorems for \(\alpha \)-nonexpansive mappings in Banach spaces. Nonlinear Anal. 74, 4387–4391 (2011)
Byren, C.: A unified treatment of some iterative algorithms in signal processing and image reconstruction. Inverse Probl 20, 120–130 (2004)
Das, G., Debata, J.P.: Fixed points of quasi-nonexpansive mappings. Indian J. Pure. Appl. Math. 17, 1263–1269 (1986)
Diaz, J.B., Metcalf, F.T.: On the structure of the set of subsequential limit points of successive approximations. Bull. Am. Math. Soc. 73, 516–519 (1967)
Fukhar-ud-din, H.: Existence and approximation of fixed points in convex metric spaces. Carpathian J. Math. 30, 175–185 (2014)
Fukhar-ud-din, H.: One step iterative scheme for a pair of nonexpansive mappings in a convex metric space. Hacet. J. Math. Stat. 44, 1023–1031 (2015)
Fukhar-ud-din, H.: Convergence of Ishikawa type iteration process of three quasi-nonexpansive mappings in a convex metric space. Annale Univ. Ovidius Constanta Mathematica 23(2), 83–92 (2015)
Fukhar-ud-din, H., Saleh, K.: One-step iterations for a finite family of generalized nonexpansive mappings in CAT(0) spaces. Bull. Malays. Math. Sci. Soc. 41, 597–608 (2018). https://doi.org/10.1007/s40840-016-0310-x
Ghoncheh, S.J.H., Razani, A.: Fixed point theorems for some generalized nonexpansive mappings in ptolemy spaces. Fixed Point Theory Appl. 2014, 76 (2014)
Ishikawa, S.: Fixed point by a new iteration method. Proc. Am. Math. Soc. 44, 147–150 (1974)
Khan, A.R., Khamsi, M.A., Fukhar-ud-din, H.: Strong convergence of a general iteration scheme in CAT\(\left(0\right) \) -spaces. Nonlinear Anal. 74, 783–791 (2011)
Khan, S.H., Fukhar-ud-din, H.: Weak and strong convergence of a scheme with errors for two nonexpansive mappings. Nonlinear Anal. 61, 1295–1301 (2005)
Khan, S.H., Fukhar-ud-din, H.: Convergence theorems for two finite families of some generalized nonexpansive mappings in hyperbolic spaces. J. Nonlinear Sci. Appl. 10, 734–743 (2017)
Khan, S.H., Takahashi, W.: Approximating common fixed points of two asymptotically nonexpansive mappings. Sci. Math. Jpn. 53, 143–148 (2001)
Khan, S.H., Abbas, M., Khan, A.R.: Common fixed points of two nonexpansive mappings by a new one-step iteration process. Iran. J. Sci. Tech., Trans. A 33(A3), 249–257 (2009)
Kohsaka, F., Takahashi, W.: Fixed point theorems for a class of nonlinear mappings related to maximal monotone operators in Banach spaces. Arch. Math. (Basel) 91(2), 166–177 (2008)
Kuhfittig, P.K.F.: Common fixed points of nonexpansive mappings by iteration. Pac. J. Math. 97, 137–139 (1981)
Mann, R.W.: Mean value methods in iteration. Proc. Am. Math. Soc. 4, 506–510 (1953)
Moosaei, M.: On fixed points of fundamentally nonexpansive mappings in Banach spaces. Int. J. Nonlinear Anal. Appl. 7, 219–224 (2016)
Naraghirad, E.: Approximation of common fixed points of nonlinear mappings satisfying jointly demiclosedness principle in Banach spaces. Mediterr. J. Math. 14, 162 (2017)
Senter, H.F., Dotson, W.G.: Approximating fixed points of nonexpansive mappings. Proc. Am. Math. Soc. 44, 375–380 (1974)
Shimizu, T., Takahashi, W.: Fixed points of multivalued mappings in certain convex metric spaces. Topol. Methods Nonlinear Anal. 8, 197–203 (1996)
Suzuki, T.: Fixed point theorems and convergence theorems for some generalized nonexpansive mappings. J. Math. Anal. Appl. 341, 1088–1095 (2008)
Takahashi, W.: A convexity in metric spaces and nonexpansive mappings. Kodai Math. Sem. Rep. 22, 142–149 (1970)
Takahashi, W.: Fixed point theorems for new nonlinear mappings in a Hilbert space. J. Nonlinear Convex Anal. 11, 79–88 (2010)
Takahashi, W., Tamura, T.: Convergence theorems for a pair of nonexpansive mappings. J. Nonlinear Convex Anal. 5, 45–58 (1995)
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Fukhar-ud-din, H., Khan, A.R. Approximation of Common Fixed Point of Two Quasi-nonexpansive Mappings in Convex Metric Spaces. Mediterr. J. Math. 15, 77 (2018). https://doi.org/10.1007/s00009-018-1121-0
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DOI: https://doi.org/10.1007/s00009-018-1121-0
Keywords
- Convex metric space
- quasi-nonexpansive mapping
- jointly demiclosed principle
- common fixed point
- iterative algorithm
- convergence