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arXiv · 2406.18231

Return time sets and product recurrence

Jian Li·Xianjuan Liang·Yini Yang
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Abstract

Let $G$ be a countable infinite discrete group. We show that a subset $F$ of $G$ contains a return time set of some piecewise syndetic recurrent point $x$ in a compact Hausdorff space $X$ with a $G$-action if and only if $F$ is a quasi-central set. As an application, we show that if a nonempty closed subsemigroup $S$ of the Stone-\v{C}ech compactification $\beta G$ contains the smallest ideal $K(\beta G)$ of $\beta G$ then $S$-product recurrent is equivalent to distality, which partially answers a question of Auslander and Furstenberg (Trans. Amer. Math. Soc. 343, 1994, 221--232).

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Jian Li, Xianjuan Liang, Yini Yang. 2024-06-26. Return time sets and product recurrence. https://doi.org/10.4064/fm241006-2-1

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