University Sultan Moulay Soulayman, Beni-Mellal
Abstract: We first show that if $Y$ is a nonempty AR space and $F\colon Y \rightarrow Y$ is a compact $n$-valued multifunction, then $F$ has at least $n$ fixed point. We also prove that if $C$ is a nonempty closed convex subset of a topological vector space $E$ and $F \colon C \rightarrow C$ is a continuous $\Phi$-condensing $n$-valued multifunction, then $F$ has at least $n$ fixed points.
Keywords: AR spaces, $n$-valued multifunction, convex set, fixed point, $\Phi$-condensing multifunction
Classification (MSC2000): 46A55; 52A07, 54H25
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