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arXiv 1003.2605math.DS
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一类具有重叠结构的自相似分形的投影压力和Bowen方程

Projection Pressure and Bowen's Equation for a Class of Self-similar Fractals with Overlap Structure

Chenwei Wang, Ercai Chen

摘要:

设$\{S_i\}_{i=1}^{l}$是具有吸引子K的$\mathbb{R}^d$上的迭代函数系(IFS).设$π$为正则投影。本文对$ϕ\in C(\mathbb{R}^d)$在一定的仿射IFS下定义了投影压力$P_π(ϕ)$的概念,并给出了投影压力的变分原理.进一步证明了当每个$S_i$都是压缩比相同的相似映射时,“投影压力”的唯一零根仍满足Bowen方程。利用Bowen方程的根,我们可以得到吸引子$K$的豪斯多夫维数.

英文摘要:

Let $\{S_i\}_{i=1}^{l}$ be an iterated function system(IFS) on $\mathbb{R}^d$ with attractor K. Let $π$ be the canonical projection. In this paper we define a new concept called "projection pressure" $P_π(ϕ)$ for $ϕ\in C(\mathbb{R}^d)$ under certain affine IFS, and show the variational principle about the projection pressure. Furthermore we check that the unique zero root of "projection pressure" still satisfies Bowen's equation when each $S_i$ is the similar map with the same compression ratio. Using the root of Bowen's equation, we can get the Hausdorff dimension of the attractor $K$.

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