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arXiv math/0311187math.DS
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同宿轨道和异宿轨道的曲面自同态的最小熵模型

Entropy-minimising models of surface diffeomorphisms relative to homoclinic and heteroclinic orbits

Pieter Collins

摘要:

在与同宿和异宿轨道相关的曲面超同态理论中,可以计算任何不可约合痕类的一维代表映射。这个图的代表的拓扑熵等于一个给定周期的本质Nielsen类的数目的增长率,并且因此是该图同态的拓扑熵的一个下界。本文证明了这个熵界是合痕类中同构拓扑熵的无穷大,并给出了无穷大熵为最小的充要条件。

英文摘要:

In the theory of surface diffeomorphisms relative to homoclinic and heteroclinic orbits, it is possible to compute a one-dimensional representative map for any irreducible isotopy class. The topological entropy of this graph representative is equal to the growth rate of the number of essential Nielsen classes of a given period, and hence is a lower bound for the topological entropy of the diffeomorphism. In this paper, we show that this entropy bound is the infemum of the topological entropies of diffeomorphisms in the isotopy class, and give necessary and sufficient conditions for the infemal entropy to be a minimum.

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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