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Approximate fixed point sequences and convergence theorems for Lipschitz pseudocontractive maps
Authors:C E Chidume  H Zegeye
Institution: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 $F(T):=\{x\in K:Tx=x\}\neq \emptyset$. An iterative sequence $\{x_n\}$ is constructed for which $\vert\vert x_n-Tx_n\vert\vert\rightarrow 0$ as $n\rightarrow \infty$. 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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