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arXiv 0811.4230math.DSmath.GN
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子集上的降低拓扑熵

Lowering topological entropy over subsets

Wen Huang, Xiangdong Ye, Guohua Zhang

摘要:

设$(X, T)$是一个拓扑动力系统(TDS),$h (T, K)$是$X$的子集$K$的拓扑熵. $(X, T)$是{ \it lowerable},如果对于每个$0\le h\le h (T, X)$,存在具有熵$h$的非空紧子集;是{ \it遗传lowerable},如果每个非空紧子集是lowerable;是{ \it遗传一致lowerable},如果对于每个非空紧子集$K$和每个$0\le h\le h (T, K)$,存在具有$h (T, K_h)= h$和$K_h$的非空紧子集$K_h\subseteq K$,最多有一个极限点。证明了每个有限熵的TDS是可降的,并且TDS $(X, T)$是遗传一致可降的当且仅当它是渐近$h$ -扩张的.

英文摘要:

Let $(X, T)$ be a topological dynamical system (TDS), and $h (T, K)$ the topological entropy of a subset $K$ of $X$. $(X, T)$ is {\it lowerable} if for each $0\le h\le h (T, X)$ there is a non-empty compact subset with entropy $h$; is {\it hereditarily lowerable} if each non-empty compact subset is lowerable; is {\it hereditarily uniformly lowerable} if for each non-empty compact subset $K$ and each $0\le h\le h (T, K)$ there is a non-empty compact subset $K_h\subseteq K$ with $h (T, K_h)= h$ and $K_h$ has at most one limit point. It is shown that each TDS with finite entropy is lowerable, and that a TDS $(X, T)$ is hereditarily uniformly lowerable if and only if it is asymptotically $h$-expansive.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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