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arXiv 1403.6142math.PR
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双线性随机微分方程的一阶弱平衡格式

First-order weak balanced schemes for bilinear stochastic differential equations

H. A. Mardones, C. M. Mora

摘要:

我们使用线性标量格式作为一个测试问题,证明了通过在漂移项上增加稳定化函数,可以构造几乎必然稳定的一阶弱平衡格式。然后,我们设计了多维双线性方程的平衡格式,实现了一阶弱收敛,不涉及多个随机积分。为此,我们遵循两种方法来找到合适的稳定权重;通过优化过程或基于封闭的启发式公式。数值实验表明,新的数值格式的一个有前途的性能。

英文摘要:

We use the linear scalar SDE as a test problem to show that it is possible to construct almost sure stable first-order weak balanced schemes based on the addition of stabilizing functions to the drift terms. Then, we design balanced schemes for multidimensional bilinear SDEs achieving the first order of weak convergence, which do not involve multiple stochastic integrals. To this end, we follow two methodologies to find appropriate stabilizing weights; through an optimization procedure or based on a closed heuristic formula. Numerical experiments show a promising performance of the new numerical schemes.

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