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arXiv 0710.1845math.DS
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分段扩张单峰映射的光滑变形

Smooth deformations of piecewise expanding unimodal maps

Viviane Baladi, Daniel Smania

摘要:

在C^k分段扩张单峰映射空间中,k>=1,我们将拓扑动力学不变的C ^1光滑映射族(“光滑变形”)刻画为与该空间中余维1子空间(“水平”方向)的连续分布相切的映射族。此外,这种余维1子空间被定义为一类显式线性泛函的核。因此,我们证明了当k>=2时,存在与每个给定的C^k水平方向相切的C^{k-1+Lip}变形。

英文摘要:

In the space of C^k piecewise expanding unimodal maps, k>=1, we characterize the C^1 smooth families of maps where the topological dynamics does not change (the "smooth deformations") as the families tangent to a continuous distribution of codimension-one subspaces (the "horizontal" directions) in that space. Furthermore such codimension-one subspaces are defined as the kernels of an explicit class of linear functionals. As a consequence we show the existence of C^{k-1+Lip} deformations tangent to every given C^k horizontal direction, for k>=2.

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