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arXiv 1012.5399math.MGmath.DS
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一维自共形集的分形曲率测度和Minkowski容度

Fractal curvature measures and Minkowski content for one-dimensional self-conformal sets

Marc Kesseböhmer, Sabrina Kombrink

摘要:

证明了满足开集条件的一维共形迭代函数系的不变集的分形曲率测度存在的充要条件是其对应的几何势函数是非格的.在非格情形下,我们得到了Minkowski容度的存在性,并证明了分形曲率测度是$δ$ -共形测度的常数倍,其中$δ$表示不变集的Minkowski维数.对于第一个分形曲率测度,这个常数因子与不变集的Minkowski容度一致。在格的情况下,我们给出了充分条件的Minkowski内容的不变集存在,对比的事实,Minkowski内容的自相似格分形从来没有存在。然而,每一个满足开集条件的自相似集都有一个Minkowski可测的$\mathcal{C}^{1+α}$同构像。无论是在晶格和非晶格的情况下,平均版本的分形曲率措施总是存在的。

英文摘要:

We show that the fractal curvature measures of invariant sets of one-dimensional conformal iterated function systems satisfying the open set condition exist, if and only if the associated geometric potential function is nonlattice. Moreover, in the nonlattice situation we obtain that the Minkowski content exists and prove that the fractal curvature measures are constant multiples of the $δ$-conformal measure, where $δ$ denotes the Minkowski dimension of the invariant set. For the first fractal curvature measure, this constant factor coincides with the Minkowski content of the invariant set. In the lattice situation we give sufficient conditions for the Minkowski content of the invariant set to exist, contrasting the fact that the Minkowski content of a self-similar lattice fractal never exists. However, every self-similar set satisfying the open set condition exhibits a Minkowski measurable $\mathcal{C}^{1+α}$ diffeomorphic image. Both in the lattice and nonlattice situation average versions of the fractal curvature measures are shown to always exist.

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