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arXiv · 2007.00439

Super Asymptotically Nonexpansive Actions of Semitopological Semigroups on Frechet and Locally Convex Spaces

Bui Ngoc Muoi·Ngai-Ching Wong
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Abstract

Let LUC$(S)$ be the space of left uniformly continuous functions on a semitopological semigroup $S$. Suppose that $S$ is right reversible and $\operatorname{LUC}(S)$ has a left invariant mean. Let $(X,d)$ be a Fr\'echet space. Let $\tau$ be a locally convex topology of $X$ weaker than the $d$-topology such that the metric $d$ is $\tau$-lower semicontinuous. Let $K$ be a $d$--separable and $\tau$--compact convex subset of $X$. We show that every jointly $\tau$-continuous and super asymptotically $d$-nonexpansive action $S\times K\mapsto K$ of $S$ has a common fixed point. Similar results in the locally convex space setting are provided.

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Bui Ngoc Muoi, Ngai-Ching Wong. 2020-06-27. Super Asymptotically Nonexpansive Actions of Semitopological Semigroups on Frechet and Locally Convex Spaces. https://arxiv.org/abs/2007.00439

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