Approximating fixed points of mappings satisfying condition (E) in Busemann space
Original Paper
First Online:
Received:
Accepted:
- 182 Downloads
Abstract
It is well-known that in a Banach space, using the Ishikawa iterative process, one can find fixed points of nonexpansive mappings via asymptotic center’s method. In this paper, we obtain the fixed points of mappings satisfying so-called condition (E) in a uniformly convex Busemann space. Many known results in CAT (0) spaces are improved and extended by our results.
Keywords
Asymptotic center Mappings satisfying condition (E) Ishikawa iterative process Uniformly convex Busemann spaceMathematics Subject Classification (2010)
Primary: 47H10, 54H25 Secondary: 54E40Preview
Unable to display preview. Download preview PDF.
References
- 1.Busemann, H.: Spaces with nonpositive curvature. Acta Math. 80, 259–310 (1948)MathSciNetCrossRefMATHGoogle Scholar
- 2.Dhompongsa, S., Inthakon, W., Kaewkhao, A.: Edelstein’s method and fixed point theorems for some generalized nonexpansive mappings. J. Math. Anal. Appl. 350, 12–17 (2009)MathSciNetCrossRefMATHGoogle Scholar
- 3.Dhompongsa, S., Panyanak, B.: On Δ-convergence theorems in C A T(0) spaces. Comput. Math. Appl. 56, 2572–2579 (2008)MathSciNetCrossRefMATHGoogle Scholar
- 4.Espínola, R., Fernández-León, A.: C A T(k)-spaces, weak convergence and fixed points. J. Math. Anal. Appl. 353, 410–427 (2009)MathSciNetCrossRefMATHGoogle Scholar
- 5.Espínola, R., Fernández-León, A., Piatek, B.: Fixed points of single- and set-valued mappings in uniformly convex metric spaces with no metric convexity. Fixed Point Theory Appl. (2010). Article ID 169837Google Scholar
- 6.Foertsch, T., Lytchak, A., Schroeder, V.: Non-positive curvature and the ptolemy inequality. Int. Math. Res. Not. IMRN 22 (2007). doi: 10.1093/imrn/rnm100
- 7.García-Falset, J., Llorens-Fuster, E., Suzuki, T.: Fixed point theory for a class of generalized nonexpansive mappings. J. Math. Anal. Appl. 375, 185–195 (2011)MathSciNetCrossRefMATHGoogle Scholar
- 8.Genel, A., Lindenstrass, J.: An example concerning fixed points. Israel J. Math. 22, 81–86 (1975)MathSciNetCrossRefMATHGoogle Scholar
- 9.Goebel, K., Kirk, W.A.: Topics in metric fixed point theory. Cambridge University Press, Cambridge (1990)CrossRefMATHGoogle Scholar
- 10.Khamsi, M.A., Khan, A.R.: Inequalities in metric spaces with applications. Nonlinear Anal. 74, 4036–4045 (2011)MathSciNetCrossRefMATHGoogle Scholar
- 11.Khan, S.H., Suzuki, T.: A Reich-type convergence theorem for generalized nonexpansive mappings in uniformly convex Banach spaces. Nonlinear Anal. 80, 211–215 (2013)MathSciNetCrossRefMATHGoogle Scholar
- 12.Kirk, W.A.: Geodesic geometry and fixed point theory. In: Girela, D., López, G., Villa, R. (eds.) Seminar of Mathematical Analysis, Proceedings, Universities of Malaga and Seville, Sept. 2002-Feb. 2003, pp 195–225. Universidad de Sevilla, Sevilla (2003)Google Scholar
- 13.Kirk, W.A.: Geodesic geometry and fixed point theory II. In: García-Falset, J., Llorens-Fuster, E., Sims, B. (eds.) Fixed Point Theory and its Applications, pp 113–142. Yokohama Publ., Yokohama (2004)Google Scholar
- 14.Kirk, W.A., Panyanak, B.: A concept of convergence in geodesic spaces. Nonlinear Anal. 68, 3689–3696 (2008)MathSciNetCrossRefMATHGoogle Scholar
- 15.Kohlenbach, U.: Some logical metatheorems with applications in functional analysis. Trans. Amer. Math. Soc. 357, 89–128 (2005)MathSciNetCrossRefMATHGoogle Scholar
- 16.Leuştean, L.: Nonexpansive iterations in uniformly convex W-hyperbolic spaces. In: Leizarowitz, A., Mordukhovich, B. S., Shafrir, I., Zaslavski A. (eds.) Nonlinear Analysis and Optimization I: Nonlinear Analysis, Contemporary Mathematics. AMS, vol. 513, pp 193–209 (2010)Google Scholar
- 17.Lim, T.C.: Remarks on some fixed point theorems. Proc. Amer. Math. Soc. 60, 179–182 (1976)MathSciNetCrossRefGoogle Scholar
- 18.Nanjaras, B., Panyanak, B., Phuengrattana, W.: Fixed point theorems and convergence theorems for Suzuki-generalized nonexpansive mappings in C A T(0) spaces. Nonlinear Anal. Hybrid Syst. 4, 25–31 (2010)MathSciNetCrossRefMATHGoogle Scholar
- 19.Naraghirad, E., Wong, N.C., Yao, J.C.: Approximating fixed points of α-nonexpansive mappings in uniformly convex Banach spaces and C A T(0) spaces. Fixed Point Theory Appl. (2013). Article ID 57Google Scholar
- 20.Oppenheim, I.: Fixed point theorem for reflexive Banach spaces and uniformly convex non positively curved metric spaces. Math. Z., 1–13 (2012)Google Scholar
- 21.Panyanak, B., Laokul, T.: On the Ishikawa iteration process in C A T(0) spaces. Bull. Iranian Math. Soc. 37, 185–197 (2011)MathSciNetGoogle Scholar
- 22.Papadopoulos, A.: Metric spaces, Convexity and Nonpositive Curvature. IRMA Lectures in Mathematics and Theoretical Physics 6. European Mathematical Society (2005)Google Scholar
- 23.Phuengrattana, W.: Approximating fixed points of Suzuki-generalized nonexpansive mappings. Nonlinear Anal. Hybrid Syst. 5, 583–590 (2011)MathSciNetCrossRefMATHGoogle Scholar
- 24.Reich, S.: Weak convergence theorems for nonexpansive mappings in Banach spaces. J. Math. Anal. Appl. 67, 274–276 (1979)MathSciNetCrossRefMATHGoogle Scholar
- 25.Senter, H.F., Dotson, W.G.: Approximating fixed points of nonexpansive mappings. Proc. Amer. Math. Soc. 44, 375–380 (1974)MathSciNetCrossRefMATHGoogle Scholar
- 26.Sosov, E.N.: On analogues of weak convergence in a special metric space. Izv. Vyssh. Uchebn. Zaved. Mat. 5(2004), 84–89 (Russian); English transl. Russian Math. (Iz. VUZ) 48, 79–83 (2004)MathSciNetMATHGoogle Scholar
- 27.Suzuki, T.: Fixed point theorems and convergence theorems for some generalized nonexpansive mappings. J. Math. Anal. Appl. 340, 1088–1095 (2008)MathSciNetCrossRefMATHGoogle Scholar
Copyright information
© Springer Science+Business Media New York 2015