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arXiv 1601.04025math.DS
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拓扑熵与李雅普诺夫指数之间的联系

A link between Topological Entropy and Lyapunov Exponents

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摘要:

我们证明了一般的非部分双曲辛同态$C^1-$ $f$的拓扑熵等于其双曲周期点的正李雅普诺夫指数之和的上确界.此外,我们还证明了$f$的拓扑熵近似于$f$的拓扑熵限制在基本双曲集上.特别地,拓扑熵映射在远离部分双曲性的辛同态的$C^1-$脱殊集中是下连续的。

英文摘要:

We show that a $C^1-$generic non partially hyperbolic symplectic diffeomorphism $f$ has topological entropy equal to the supremum of the sum of the positive Lyapunov exponents of its hyperbolic periodic points. Moreover, we also prove that $f$ has topological entropy approximated by the topological entropy of $f$ restrict to basic hyperbolic sets. In particular, the topological entropy map is lower semicontinuous in a $C^1-$generic set of symplectic diffeomorphisms far from partial hyperbolicity.

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