Multifractal Analysis and Wavelets
Multifractal Analysis and Wavelets
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多重分形分析和小波
DOI:
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发表时间:
2016
期刊:
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通讯作者:
S. Seuret
中科院分区:
文献类型:
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作者:
S. Seuret
In this course, we give the basics of the part of multifractal theory that intersects wavelet theory. We start by characterizing the pointwise Holder exponents by some decay rates of wavelet coefficients. Then, we give some examples of wavelet series having a multifractal behavior, and we explain how to build wavelet series with prescribed pointwise Holder exponents. Next we develop the problematics of multifractal formalism, going from the intuitive formula by Frisch and Parisi to explicit and exploitable formulas. We prove that “multifractals are everywhere,” in the sense that typical functions in Besov spaces or typical measures are multifractal in the sense of Baire categories. We finish by some well-known examples of multifractal wavelet series, random and deterministic, focusing on the influence of certain adaptive threshold procedures to the multifractal properties of signals.