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arXiv 1503.00073math.NAcs.NA
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半线性随机波动方程的完全离散化(由乘性噪声驱动)

Full discretisation of semi-linear stochastic wave equations driven by multiplicative noise

Umeå University(于默奥大学);University of Innsbruck(因斯布鲁克大学);Chalmers University of Technology and University of Gothenburg(查尔姆斯理工大学和哥德堡大学);Central South University(中南大学)

Rikard Anton, David Cohen, Stig Larsson, Xiaojie Wang

AI总结:

本文提出了一种完全离散化方法,用于求解由乘性噪声驱动的半线性随机波动方程。采用线性有限元方法进行空间离散,结合随机三角函数方法进行时间离散,该方法在均方误差界上与空间离散无关,不依赖于步长限制,且满足近似迹公式。

摘要:

本文提出了一种完全离散化方法,用于求解由乘性噪声驱动的半线性随机波动方程。采用线性有限元方法进行空间离散,结合随机三角函数方法进行时间离散。该显式时间积分器允许均方误差界与空间离散无关,因此不受到如常用于Störmer-Verlet-leap-frog方案那样的步长限制。此外,它满足几乎迹公式(即问题能量期望值的线性漂移)。数值实验验证了理论结果。

英文摘要:

A fully discrete approximation of the semi-linear stochastic wave equation driven by multiplicative noise is presented. A standard linear finite element approximation is used in space and a stochastic trigonometric method for the temporal approximation. This explicit time integrator allows for mean-square error bounds independent of the space discretisation and thus do not suffer from a step size restriction as in the often used Störmer-Verlet-leap-frog scheme. Furthermore, it satisfies an almost trace formula (i.e., a linear drift of the expected value of the energy of the problem). Numerical experiments are presented and confirm the theoretical results.

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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