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arXiv math/0203066math.DS
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区间上自同态的增长间隙

A growth gap for diffeomorphisms of the interval

Leonid Polterovich, Mikhail Sodin

摘要:

给定区间[0;1]上的一个保向同构,考虑其第n次迭代的微分的一致范数。我们得到了一个关于n的函数,叫做增长序列。它的渐进行为是一个有趣的不变量,自然出现在微分同胚群的几何和光滑动力学中。我们的主要结果是下面的间隙定理:这个序列的增长率是指数,或最多与n的平方。进一步,我们构造了具有相当不规则行为的增长序列的自同态。这种构造很容易推广到任意流形。

英文摘要:

Given an orientation-preserving diffeomorphism of the interval [0;1], consider the uniform norm of the differential of its n-th iteration. We get a function of n called the growth sequence. Its asymptotic behaviour is an interesting invariant which naturally appears both in geometry of the diffeomorphisms groups and in smooth dynamics. Our main result is the following Gap Theorem: the growth rate of this sequence is either exponential, or at most quadratic with n. Further, we construct diffeomorphisms with quite an irregular behaviour of the growth sequence. This construction easily extends to arbitrary manifolds.

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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