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arXiv 1111.3795math.PR
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巴拿赫空间上跳过程的耦合与强Feller

Coupling and Strong Feller for Jump Processes on Banach Spaces

Feng-Yu Wang, Jian Wang

摘要:

利用Lévy测度w.r.t.的下界条件,给出了一个新的Lévy测度的估计.研究了巴拿赫空间上一类由(非圆柱)Lévy过程驱动的线性偏微分方程所对应的马尔可夫半群的耦合性和强Feller性质.与有限维情形不同,在有限维情形中,这些性质也被证实为没有漂移的Lévy过程,在无限维情形中,漂移项的出现对于通过移动初始数据来确保过程的准不变性是必不可少的。梯度估计和指数收敛性也进行了研究。主要结果通过Wiener空间和可分希尔伯特空间上的具体模型来说明。

英文摘要:

By using lower bound conditions of the Lévy measure w.r.t. a nice reference measure, the coupling and strong Feller properties are investigated for the Markov semigroup associated with a class of linear SDEs driven by (non-cylindrical) Lévy processes on a Banach space. Unlike in the finite-dimensional case where these properties have also been confirmed for Lévy processes without drift, in the infinite-dimensional setting the appearance of a drift term is essential to ensure the quasi-invariance of the process by shifting the initial data. Gradient estimates and exponential convergence are also investigated. The main results are illustrated by specific models on the Wiener space and separable Hilbert spaces.

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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