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arXiv 2609.35092math.DS

Gatzouras--Lalley 测度的多重分形分析

Multifractal analysis of Gatzouras--Lalley measures

Thomas Jordan, István Kolossváry, Alex Rutar

AI总结:

本文研究 Gatzouras--Lalley 型自仿射测度的多重分形分析,证明 Olsen 谱的变分公式,并指出多重分形形式在可微点成立,但一般可能失败且存在跳跃间断和多个相变。

AI中文摘要:

我们研究了支撑在 Gatzouras--Lalley 型平面地毯上的自仿射测度的多重分形分析。我们主要使用 Olsen 的 $L^q$ 谱的 Hausdorff 维数变体,记为 $\vartheta(q)$。我们证明了 $\vartheta$ 的一个变分公式,由此得出,在 $\vartheta(q)$ 可微的所有 $q$ 值处,多重分形形式成立。然而,一般来说,$\vartheta$ 不一定可微,多重分形形式可能失败。事实上,多重分形谱可能不可微,并且在其支撑的内部存在跳跃间断,并且在 $q$ 的负值和正值处都可能出现多个相变。

英文摘要:

We study the multifractal analysis of self-affine measures supported on planar carpets of type Gatzouras--Lalley. We work primarily with Olsen's Hausdorff-dimensional variant of the $L^q$ spectrum, which we denote by $\vartheta(q)$. We prove a variational formula for $\vartheta$, from which it follows that multifractal formalism holds at all values $q$ for which $\vartheta(q)$ is differentiable. However, in general, $\vartheta$ need not be differentiable and the multifractal formalism may fail. In fact, the multifractal spectrum may be non-differentiable and have jump discontinuities in the interior of its support, and there may be multiple phase transitions at both negative and positive values of $q$.

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