数学理论与应用 ›› 2025, Vol. 45 ›› Issue (2): 22-39.doi: 10.3969/j.issn.1006-8074.2025.02.002

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具有单边Lipschitz系数的半线性随机微分方程周期解的驯服Euler方法

郭雨佳,牛原玲*   

  1. 中南大学数学与统计学院, 长沙, 410083
  • 出版日期:2025-06-28 发布日期:2025-08-09

The Tamed Euler Method for Random Periodic Solution of Semilinear SDEs with One-sided Lipschitz Coefficient

GUO Yujia , NIU Yuanling*   

  1. School of Mathematics and Statistics, Central South University, Changsha 410083, China
  • Online:2025-06-28 Published:2025-08-09
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (Nos.12471394, 12371417) and Natural Science Foundation of Changsha (kq2502101)

摘要: 本文研究一类具有单边 Lipschitz 系数的半线性随机微分方程的驯服 Euler 方法对随机周期解的近似. 我们提出一种新的误差分析方法,该方法不依赖于数值解的高阶矩有界性. 理论分析表明,本文提出的数值格式具有 1 阶均方收敛率. 此外,本文通过数值算例验证了理论结果的正确性.

关键词: 驯服Euler方法, 随机周期解, 单边Lipschitz系数 , 1阶均方收敛率

Abstract:

 This paper aims to investigate the tamed Euler method for the random periodic solution of semilinear SDEs with one-sided Lipschitz coefficient. We introduce a novel approach to analyze mean-square error bounds of the novel schemes, without relying on a priori high-order moment bound of the numerical approximation. The expected order-one mean square convergence is attained for the proposed scheme.Moreover, a numerical example is presented to verify our theoretical analysis.

Key words: Tamed Euler method , Random periodic solution , One-sided Lipschitz coefficient , Order-one mean square convergence