Kusuoka-Stroock gradient bounds for the solution of the filtering equation
Kusuoka-Stroock gradient bounds for the solution of the filtering equation
复制标题
滤波方程解的 Kusuoka-Stroock 梯度界限
DOI:
10.1016/j.jfa.2014.12.009
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发表时间:
2015
影响因子:
1.7
通讯作者:
Crisan D
中科院分区:
文献类型:
--
作者:
Crisan D
We obtain sharp gradient bounds for perturbed diffusion semigroups. In contrast with existing results, the perturbation is here random and the bounds obtained are pathwise. Our approach builds on the classical work of Kusuoka and Stroock [13], [14], [16], [17], and extends their program developed for the heat semi-group to solutions of stochastic partial differential equations. The work is motivated by and applied to nonlinear filtering. The analysis allows us to derive pathwise gradient bounds for the un-normalised conditional distribution of a partially observed signal. It uses a pathwise representation of the perturbed semigroup following Ocone [22]. The estimates we derive have sharp small time asymptotics.
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影响因子:
2
作者:
S. Kusuoka;D. Stroock
通讯作者:
D. Stroock
影响因子:
1.7
作者:
J. Bismut;D. Michel
通讯作者:
D. Michel
影响因子:
1.7
作者:
D. Nualart;M. Zakai
通讯作者:
M. Zakai
DOI:
10.1007/978-3-319-00413-6_4
发表时间:
2013
期刊:
Inf. Control.
影响因子:
--
作者:
D. Crisan;K. Manolarakis;C. Nee
通讯作者:
C. Nee
影响因子:
2
作者:
J.M.C. Clark;D. Crisan
通讯作者:
D. Crisan