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arXiv 2007.16178math.PR
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分数阶布朗运动驱动的微分方程的精确局部估计:椭圆情形

Precise Local Estimates for Differential Equations driven by Fractional Brownian Motion: Elliptic Case

Xi Geng, Cheng Ouyang, Samy Tindel

摘要:

本文研究了由具有Hurst参数$H>1/4$的$d$维分数布朗运动驱动的随机微分方程,在粗糙路径意义下理解.当方程的系数满足一致椭圆性条件时,我们建立了相应的控制距离函数的精确局部估计和解的密度的精确局部下估计.

英文摘要:

This article is concerned with stochastic differential equations driven by a $d$ dimensional fractional Brownian motion with Hurst parameter $H>1/4$, understood in the rough paths sense. Whenever the coefficients of the equation satisfy a uniform ellipticity condition, we establish a sharp local estimate on the associated control distance function and a sharp local lower estimate on the density of the solution.

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