2 papers
math.DS2011
Infinite-step nilsystems, independence and complexity
P. D. Dong, S. Donoso, A. Maass +2
An -step nilsystem is an inverse limit of minimal nilsystems. In this article is shown that a minimal distal system is an -step nilsystem if and only if it has no n…
math.DS2009
Product recurrent properties, disjointness and weak disjointness
Pandeng Dong, Song Shao, Xiangdong Ye
Let $\F$ be a collection of subsets of and be a dynamical system. is $\F$-recurrent if for each neighborhood of , $\{n\in\Z_+:T^n x\in U\}\in \F$. $x…