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arXiv 2007.10203math.PR
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含时无关噪声的随机wave equation的精确渐近性

Exact asymptotics of the stochastic wave equation with time-independent noise

Raluca M. Balan, Le Chen, Xia Chen

摘要:

本文研究了由不依赖于时间的高斯噪声$\dot{W}$驱动的高维随机波动方程$d\leq 3$.我们假设噪声是白噪声,或者噪声的协方差函数满足类似于里斯核的缩放性质。该解决方案是解释在Skorohod意义上使用Malliavin演算。我们得到了解的$p$阶矩的精确渐近行为,无论是当时间很大或当$p$很大。对于临界情形,即当$d=3$和噪声为白噪声时,我们得到了二阶矩为有限的精确跃迁时间。

英文摘要:

In this article, we study the stochastic wave equation in all dimensions $d\leq 3$, driven by a Gaussian noise $\dot{W}$ which does not depend on time. We assume that either the noise is white, or the covariance function of the noise satisfies a scaling property similar to the Riesz kernel. The solution is interpreted in the Skorohod sense using Malliavin calculus. We obtain the exact asymptotic behaviour of the $p$-th moment of the solution either when the time is large or when $p$ is large. For the critical case, that is the case when $d=3$ and the noise is white, we obtain the exact transition time for the second moment to be finite.

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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