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arXiv 1407.4080math.PR
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指数为$H<1/2$的空间分数噪声随机偏微分方程

SPDEs with fractional noise in space with index $H<1/2$

Raluca Balan, Maria Jolis, Lluis Quer-Sardanyons

摘要:

在这篇文章中,我们考虑了具有非零初始条件的$\mathbb{R}$上的随机波动方程和热方程,由时间上是白色的高斯噪声驱动,在空间上表现为指数为$H$的分数布朗运动,其中$1/4<H<1/2$。我们假设扩散系数由仿射函数$σ(x)=ax+b$给出,初值函数是有界的,并且是$H$阶Hölder连续的.我们证明了这两个方程的温和的解决方案的存在性和唯一性。证明了对任意$p \geq 2$,解是$L^{2}(Ω)$ -连续的,其$p$阶矩是一致有界的.

英文摘要:

In this article, we consider the stochastic wave and heat equations on $\mathbb{R}$ with non-vanishing initial conditions, driven by a Gaussian noise which is white in time and behaves in space like a fractional Brownian motion of index $H$, with $1/4<H<1/2$. We assume that the diffusion coefficient is given by an affine function $σ(x)=ax+b$, and the initial value functions are bounded and Hölder continuous of order $H$. We prove the existence and uniqueness of the mild solution for both equations. We show that the solution is $L^{2}(Ω)$-continuous and its $p$-th moments are uniformly bounded, for any $p \geq 2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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