Non-zero Lyapunov exponents and uniform hyperbolicity

Non-zero Lyapunov exponents and uniform hyperbolicity
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DOI:
10.1088/0951-7715/16/4/316
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发表时间:
2003
期刊:
影响因子:
1.7
通讯作者:
Yongluo Cao
Yongluo Cao
中科院分区:
数学2区
文献类型:
--
作者:
Yongluo Cao

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本文证明了如果f是一个C_1局部微分同胚,且每个f不变概率测度的Lyapunov指数都是正的,则f是一致展开的。对于具有非一致双曲集的微分同胚,我们也给出了这一结果的一种形式。
In this paper, we proved that if f is a C1 local diffeomorphism such that the Lyapunov exponents of every f invariant probability measure are positive, then f is uniformly expanding. We also present a version of this result for diffeomorphism with a non-uniformly hyperbolic set.