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arXiv 1504.07162math.APmath.PR
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全空间上的乘性随机heat equations

Multiplicative stochastic heat equations on the whole space

Martin Hairer, Cyril Labbé

摘要:

在无界区域上构造了一类不适定的乘性随机热方程。我们的结果覆盖的两个主要方程,一方面是$\mathbf{R}^3$上的抛物线Anderson模型,另一方面是通过Cole-Hopf变换的$\mathbf{R}$上的KPZ方程。要执行这些建设,我们适应的正则性结构的理论设置加权Besov空间。我们构造的一个特别的特点是,它允许人们从初始时刻的狄拉克质量开始两个方程。

英文摘要:

We carry out the construction of some ill-posed multiplicative stochastic heat equations on unbounded domains. The two main equations our result covers are, on the one hand the parabolic Anderson model on $\mathbf{R}^3$, and on the other hand the KPZ equation on $\mathbf{R}$ via the Cole-Hopf transform. To perform these constructions, we adapt the theory of regularity structures to the setting of weighted Besov spaces. One particular feature of our construction is that it allows one to start both equations from a Dirac mass at the initial time.

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