Smoothness of the joint density for spatially homogeneous SPDEs
Smoothness of the joint density for spatially homogeneous SPDEs
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空间均匀 SPDE 的联合密度的平滑度
DOI:
10.2969/jmsj/06741605
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发表时间:
2014-10
期刊:
影响因子:
--
通讯作者:
Sun Xiaobin
中科院分区:
文献类型:
--
作者:
11Hu Yaozhong;Huang Jingyu;Nualart David;Sun Xiaobin
In this paper we consider a general class of second order stochastic partial differential equations on $\mathbb{R}^d$ driven by a Gaussian noise which is white in time and it has a homogeneous spatial covariance. Using the techniques of Malliavin calculus we derive the smoothness of the density of the solution at a fixed number of points $(t,x_1), \dots, (t,x_n)$, $t>0$, assuming some suitable regularity and non degeneracy assumptions. We also prove that the density is strictly positive in the interior of the support of the law.
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Stochastic Partial Differential Equations: Analysis and Computations
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