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Approximate fixed point sequences and convergence theorems for Lipschitz pseudocontractive maps
Authors:C. E. Chidume   H. Zegeye
Affiliation:The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy ; The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
Abstract:Let $K$ be a nonempty closed convex subset of a real Banach space $E$ and $T$ be a Lipschitz pseudocontractive self-map of $K$ with $F(T):={xin K:Tx=x}neq emptyset$. An iterative sequence ${x_n}$ is constructed for which $vertvert x_n-Tx_nvertvertrightarrow 0$ as $nrightarrow infty$. If, in addition, $K$ is assumed to be bounded, this conclusion still holds without the requirement that $F(T)neq emptyset.$ Moreover, if, in addition, $E$ has a uniformly Gâteaux differentiable norm and is such that every closed bounded convex subset of $K$ has the fixed point property for nonexpansive self-mappings, then the sequence ${x_n}$ converges strongly to a fixed point of $T$. Our iteration method is of independent interest.

Keywords:Normalized duality maps   uniformly G^{a}teaux differentiable norm   pseudocontractive maps
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