Smooth zero-entropy diffeomorphisms with ergodic derivative extension

Smooth zero-entropy diffeomorphisms with ergodic derivative extension
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具有遍历导数扩展的平滑零熵微分同胚

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发表时间:
2020
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通讯作者:
Philipp Kunde
Philipp Kunde
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作者:
Philipp Kunde

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在任何允许平滑非平凡圆作用的 2 维平滑紧连通流形上,我们构造拓扑熵为零的 C∞-微分同胚,其微分相对于切丛投影中的平滑测度而言是各态遍历的。该证明基于“共轭近似”方法的一个版本。
On any smooth compact and connected manifold of dimension 2 admitting a smooth nontrivial circle action we construct C∞-diffeomorphisms of topological entropy zero whose differential is ergodic with respect to a smooth measure in the projectivization of the tangent bundle. The proof is based on a version of the “approximation by conjugation”-method.