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Strangely dispersed minimal sets in the quasiperiodically forced Arnold circle map

机译:拟周期性强迫阿诺德圆图中的奇异分散极小集

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摘要

We study quasiperiodically forced circle endomorphisms, homotopic to the identity, and show that under suitable conditions these exhibit uncountably many minimal sets with a complicated structure, to which we refer to as 'strangely dispersed'. Along the way, we generalize some well-known results about circle endomorphisms to the uniquely ergodically forced case. Namely, all rotation numbers in the rotation interval of a uniquely ergodically forced circle endomorphism are realized on minimal sets, and if the rotation interval has a non-empty interior then the topological entropy is strictly positive. The results apply in particular to the quasiperiodically forced Arnold circle map, which serves as a paradigm example.
机译:我们研究了同位同位的准周期性强迫内同态,并表明在合适的条件下,它们表现出无数个具有复杂结构的最小集合,我们称之为“奇怪分散”。在此过程中,我们将关于圆内同态的一些众所周知的结果推广到了独特的人体工程学强迫情况下。即,在唯一的遍历遍历的强迫圆同态的旋转间隔中的所有旋转数都在极小集合上实现,并且如果旋转间隔具有非空内部,则拓扑熵严格为正。该结果尤其适用于准周期强迫的Arnold圆图,它是一个范例。

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