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Some fixed point theorems on non-convex sets

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In this paper, we prove that if $K$ is a nonempty weakly compact set in a Banach space $X$ , $T:K\to K$ is a nonexpansive map satisfying $\frac{x+Tx}{2}\in K$ for… Click to show full abstract

In this paper, we prove that if $K$ is a nonempty weakly compact set in a Banach space $X$ , $T:K\to K$ is a nonexpansive map satisfying $\frac{x+Tx}{2}\in K$ for all $x\in K$ and if $X$ is $3-$ uniformly convex or $X$ has the Opial property, then $T$ has a fixed point in $K.$

Keywords: theorems non; point; non convex; point theorems; convex sets; fixed point

Journal Title: Applied general topology
Year Published: 2017

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