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arXiv 1202.2707math.NAcs.NAmath.PR
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时空白噪声驱动的随机偏微分方程的Euler格式不变测度的逼近

Approximation of the invariant measure with an Euler scheme for Stochastic PDE's driven by Space-Time White Noise

ENS Cachan Bretagne - IRMAR, Université Rennes 1(巴黎高等师范学校卡尚校区布列塔尼分校-雷恩第一大学数学研究所)

Charles-Edouard Bréhier

AI总结:

针对时空白噪声驱动的抛物型随机偏微分方程,在非线性项有界且满足耗散性假设下,证明了半隐式Euler时间离散格式的不变测度以1/2阶精度逼近真实不变测度。

摘要:

本文考虑一类由时空白噪声驱动的抛物型随机偏微分方程及其半隐式Euler时间离散格式。当非线性项有界时,满足耗散性假设,确保该随机偏微分方程存在唯一的不变概率测度,该测度是遍历且强混合的——以指数速度收敛到平衡态。考虑$\mathcal{C}^2$类有界且导数有界的测试函数,我们证明可以利用数值格式逼近该不变测度,逼近阶为时间步长的1/2阶。

英文摘要:

In this article, we consider a stochastic PDE of parabolic type, driven by a space-time white-noise, and its numerical discretization in time with a semi-implicit Euler scheme. When the nonlinearity is assumed to be bounded, then a dissipativity assumption is satisfied, which ensures that the SDPE admits a unique invariant probability measure, which is ergodic and strongly mixing - with exponential convergence to equilibrium. Considering test functions of class $\mathcal{C}^2$, bounded and with bounded derivatives, we prove that we can approximate this invariant measure using the numerical scheme, with order 1/2 with respect to the time step.

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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