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arXiv 2001.10192math.PR
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四种新的泰勒-伊藤和泰勒-斯特劳诺维奇展开式及其在伊藤随机微分方程高阶强数值方法中的应用

Four New Forms of the Taylor-Ito and Taylor-Stratonovich Expansions and its Application to the High-Order Strong Numerical Methods for Ito Stochastic Differential Equations

Peter the Great Saint-Petersburg Polytechnic University(彼得大帝圣彼得堡理工大学)

Dmitriy F. Kuznetsov

AI总结:

本文提出四种新的泰勒-伊藤和泰勒-斯特劳诺维奇展开式,用于构建高阶强数值方法,以提高伊藤随机微分方程的数值计算精度。

摘要:

考虑伊藤随机过程在固定时间点邻域内的泰勒-伊藤和泰勒-斯特劳诺维奇展开问题。将经典的泰勒-伊藤和泰勒-斯特劳诺维奇展开式转换为四种新的表示形式,其中包括最小的迭代伊藤和斯特劳诺维奇随机积分集。因此,这些表示(所谓的统一泰勒-伊藤和泰勒-斯特劳诺维奇展开)更方便于构建伊藤随机微分方程的高阶强数值方法。基于统一的泰勒-伊藤和泰勒-斯特劳诺维奇展开式,推导出具有收敛阶1.0、1.5、2.0、2.5和3.0的显式单步强数值方案。这些数值方案中,通过多重傅里叶-勒让德级数(乘数1到6)构造了迭代伊藤和斯特劳诺维奇随机积分的有效均方近似。

英文摘要:

The problem of the Taylor-Ito and Taylor-Stratonovich expansions of the Ito stochastic processes in a neighborhood of a fixed moment of time is considered. The classical forms of the Taylor-Ito and Taylor-Stratonovich expansions are transformed to the four new representations, which includes the minimal sets of different types of iterated Ito and Stratonovich stochastic integrals. Therefore, these representations (the so-called unified Taylor-Ito and Taylor-Stratonovich expansions) are more convenient for constructing of high-order strong numerical methods for Ito stochastic differential equations. Explicit one-step strong numerical schemes with the orders of convergence 1.0, 1.5, 2.0, 2.5, and 3.0 based on the unified Taylor-Ito and Taylor-Stratonovich expansions are derived. Effective mean-square approximations of iterated Ito and Stratonovich stochastic integrals from these numerical schemes are constructed on the base of the multiple Fourier-Legendre series with multiplicities 1 to 6.

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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