On Common Fixed Points of Two Non-self Nonexpansive Mappings in Banach Spaces
Hukmi Kiziltun, Murat zdemir and Sezgin Akbulut* Author for corresponding; e-mail address: hukmu@atauni.edu.tr
Volume: Vol.34 No.3 (SEPTEMBER 2007)
Research Article
DOI:
Received: 25 April 2007, Revised: -, Accepted: 30 September 2007, Published: -
Citation: Kiziltun H., Zdemir M. and Akbulut S., On Common Fixed Points of Two Non-self Nonexpansive Mappings in Banach Spaces, Chiang Mai Journal of Science, 2007; 34(3): 281-288.
Abstract
Suppose that K is a nonempty closed convex subset of a real uniformly convex Banach space E with P as a nonexpansive retraction. Let T , S : K → E be two nonexpansive non-self maps, with F(T) ∩ F(S) :={x ∈K : Sx =Tx= x} ≠∅ . Suppose {Xn} is generated iteratively by Xn+1 = P((1-αnSP[(1-βn)Xn + βnTxn]),X1 ∈ K , n ≥ 1, where {αn} and {βn} are real sequences in [ε, 1-ε ] for some ε ∈(0,1) . It is proved that (a) If the dual E* of E has the Kadec-Klee property, then {Xn} weak convergesto some x* ∈ F(T) ∩ F(S). (b) If T and S satisfies condition (A), then {Xn} strong converges to some X* ∈ F(T) ∩ F(S)