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
中科院分区:
文献类型:
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作者:
Yonatan Gutman;Yixiao Qiao;G. Szabó
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.