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

生成讲解博客的中文版本

生成AI智能校验的中文版本