The embedding problem in topological dynamics and Takens’ theorem

The embedding problem in topological dynamics and Takens’ theorem
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DOI:
10.1088/1361-6544/aa9464
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发表时间:
2017-08
期刊:
影响因子:
1.7
通讯作者:
Yonatan Gutman;Yixiao Qiao;G. Szabó
Yonatan Gutman;Yixiao Qiao;G. Szabó
中科院分区:
数学2区
文献类型:
--
作者:
Yonatan Gutman;Yixiao Qiao;G. Szabó

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证明了平均维小于D/2的ZK作用(X,ZK,T)允许(Y,ZK,S)不大于L的罗克林维因子嵌入([0,1](L+1)D)ZK×Y,σ×S),其中D∈N,L∈N∪{0}和σ是希尔伯特立方体([0,1](L+1)D)ZK上的移位;特别地,当(Y,ZK,S)是k-环面上的无理ZK-旋转时,(X,ZK,T)嵌入(([0,1]2kD+1)ZK,σ),这与Gutman,Lindenstrauss和Tsukamoto(2016 Geom.功能。肛门。3778-817)。此外,我们给出了Z-作用具有连续可观测性的Takens嵌入定理的完整而详细的证明,并推出了关于ZK-作用的类似结果。最后,我们证明了关于Z-作用的Lindenstrauss-Tsukamoto猜想一般成立,讨论了Gutman,Qiao和Tsukamoto(2017arxiv:1709.00125)中关于ZK-作用的一个类似的猜想,并验证了它对于有限维空间上的ZK-作用。
We prove that every Zk-action (X,Zk,T) of mean dimension less than D/2 admitting a factor (Y,Zk,S) of Rokhlin dimension not greater than L embeds in (([0,1](L+1)D)Zk×Y,σ×S), where D∈N, L∈N∪{0} and σ is the shift on the Hilbert cube ([0,1](L+1)D)Zk; in particular, when (Y,Zk,S) is an irrational Zk-rotation on the k-torus, (X,Zk,T) embeds in (([0,1]2kD+1)Zk,σ), which is compared to a previous result in Gutman, Lindenstrauss and Tsukamoto (2016 Geom. Funct. Anal. 3 778–817). Moreover, we give a complete and detailed proof of Takens’ embedding theorem with a continuous observable for Z-actions and deduce the analogous result for Zk-actions. Lastly, we show that the Lindenstrauss–Tsukamoto conjecture for Z-actions holds generically, discuss an analogous conjecture for Zk-actions in Gutman, Qiao and Tsukamoto (2017 arXiv:1709.00125) and verify it for Zk-actions on finite dimensional spaces.