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arXiv 2104.02524math.PR
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三角乘性混沌及其在广义过程中的应用

Trigonometric multiplicative chaos and Application to random distributions

Aihua Fan, Yve Meyer

摘要:

在条件$\sum |ρ_n|^2=\infty$和$ρ_n\to 0$下研究了圆$\mathbb{T}$上的随机三角级数$\sum_{n=1}^\infty ρ_n \cos (nt +ω_n)$,其中$\{ω_n\}$在$\mathbb{T}$上均匀分布.它们几乎肯定不是Fourier-Stieljes级数,而是定义了伪函数。这使我们发展了三角乘性混沌理论,它是部分和的幂运算的极限。它产生一类随机测度。证明了上述级数的部分和的行为是多重分形的。我们的理论在维数$d\ge 1$的环面$\mathbb{T}^d$上成立。

英文摘要:

The random trigonometric series $\sum_{n=1}^\infty ρ_n \cos (nt +ω_n)$ on the circle $\mathbb{T}$ are studied under the conditions $\sum |ρ_n|^2=\infty$ and $ρ_n\to 0$, where $\{ω_n\}$ are iid and uniformly distributed on $\mathbb{T}$. They are almost surely not Fourier-Stieljes series but define pseudo-functions. This leads us to develop the theory of trigonometric multiplicative chaos, which are the limits of the exponentiations of partials sums. which produces a class of random measures. The behaviors of the partial sums of the above series are proved to be multifractal. Our theory holds on the torus $\mathbb{T}^d$ of dimension $d\ge 1$.

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