STRONG CONVERGENCE OF MONOTONE CQ ITERATIVE PROCESS FOR ASYMPTOTICALLY STRICT PSEUDO-CONTRACTIVE MAPPINGS

  • Zhang, Hong (Department of Mathematics, Tianjin Polytechnic university) ;
  • Su, Yongfu (Department of Mathematics, Tianjin Polytechnic university) ;
  • Li, Mengqin (Department of Mathematics, Tianjin Polytechnic university)
  • Published : 2009.05.31

Abstract

T.H. Kim, H.K. Xu, [Convergence of the modified Mann's iteration method for asymptotically strict pseudo-contractions, Nonlinear Anal.(2007),doi:l0.l016/j.na.2007.02.029.] proved the strong convergence for asymptotically strict pseudo-contractions by the classical CQ iterative method. In this paper, we apply the monotone CQ iterative method to modify the classical CQ iterative method of T.H. Kim, H.K. Xu, and to obtain the strong convergence theorems for asymptotically strict pseudo-contractions. In the proved process of this paper, Cauchy sequences method is used, so we complete the proof without using the demi-closedness principle, Opial's condition or others about weak topological technologies. In addition, we use a ingenious technology to avoid defining that F(T) is bounded. On the other hand, we relax the restriction on the control sequence of iterative scheme.

Keywords

References

  1. G. L. Acedo, H.K. Xu,Iterative methods for strict pseudo-contractions in Hilbert spaces, Nonlinear Anal. 67 (2007) 2258-2271. https://doi.org/10.1016/j.na.2006.08.036
  2. F. E Brower, W.V.Petryshyn, Construction of fixed points of nonlinear mappings in Hilbert spaces, J. Math. Anal.Appl. 20 (1967) 197-228. https://doi.org/10.1016/0022-247X(67)90085-6
  3. C. Byme,A unified treatment of some iterative algorithm in signal processing and image reconstruction.Inverse Problems, 20(2004) 103-120. https://doi.org/10.1088/0266-5611/20/1/006
  4. A. Genel, J. Lindenstrauss,An example concerning fixed points, Israel J. Math. 22 (1975) 81-86. https://doi.org/10.1007/BF02757276
  5. K. Goebel, W.A. Kirk,A fixed point theorem for asymptotically nonexpansive mappings, Proc. Am. Math. Soc. 35(1972) 171-174. https://doi.org/10.1090/S0002-9939-1972-0298500-3
  6. B. Halpern, Fixed points of nonexpanding maps, Bull. Am. Math. Soc. 73(1967) 957-961. https://doi.org/10.1090/S0002-9904-1967-11864-0
  7. T. C. Lim, H.K. Xu, Fixed point theorem for asympototically nonexpansive mapping, Nonlinear Anal. 22(1994) 1345-1355. https://doi.org/10.1016/0362-546X(94)90116-3
  8. T. H. Kim, H.K. Xu,Strong convergence of modified mann iterations,Nonlinear Anal. 61(2005) 51-60. https://doi.org/10.1016/j.na.2004.11.011
  9. T. H. Kim, H.K. Xu, Strong convergence of modified mann iterations for asymptotically nonexpansive mappings and semigroups, Nonlinear Anal. 64(2006) 1140-1152. https://doi.org/10.1016/j.na.2005.05.059
  10. T. H. Kim, H.K. Xu,Convergence of the modified Mann's iteration method for asympototically strict pseudo-contractions, Nonlinear Anal. (2007),doi:10.1016/j.na.2007.02.029.
  11. W. R. Mann,Mean value methods in iteration, Proc. Amer. Math. Soc. 4(1953) 506-510. https://doi.org/10.1090/S0002-9939-1953-0054846-3
  12. C. Matinez, H.K. Xu,Strong convergence of the CQ method for fixed point processes., Nonlinear Anal. 64(2006) 2400-2411. https://doi.org/10.1016/j.na.2005.08.018
  13. G. Marino, H.K. Xu, Weak and strong convergence theorems for strict pseudo-contractions in Hilbert spaces, J. Math. Anal. Appl. 329 (2007) 336-346 https://doi.org/10.1016/j.jmaa.2006.06.055
  14. K. Nakajo, W. Takahashi, Strong convergence theorems for nonexpansive mappings and nonexpansive semigroups, J. Math. Anal. Appl. 279(2003) 372-379. https://doi.org/10.1016/S0022-247X(02)00458-4
  15. S. Reich, Weak convergence theorems for nonexpansive mappings in Banach spaces, J. Math. Anal. Appl. 67(1979) 274-276. https://doi.org/10.1016/0022-247X(79)90024-6
  16. O. Scherzer,Convergence criteria of iterative methods based on Landweber iteration for solving nonlinear problems, J. Math. Anal. Appl. 194 (1991) 911-933. https://doi.org/10.1006/jmaa.1995.1335
  17. J. Schu,Iterative constraction of Fixed points of asympototically nonexpansive mapping,J. Math. Anal. Appl. 158(1991) 407-413. https://doi.org/10.1016/0022-247X(91)90245-U
  18. J. Schu,Approximation of Fixed points of asympototically nonexpansive mapping,Proc. Amer. Math. Soc. 112(1991) 143-451. https://doi.org/10.1090/S0002-9939-1991-1039264-7