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arXiv 2403.18552math.NAcs.NAmath.OC
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深度BSDE方法的广义收敛性:迈向全耦合FBSDE的一步及其在随机控制中的应用

Generalized convergence of the deep BSDE method: a step towards fully-coupled FBSDEs and applications in stochastic control

Balint Negyesi, Zhipeng Huang, Cornelis W. Oosterlee

AI总结:

本文推广深度BSDE方法的收敛性分析至漂移系数依赖Z的全耦合FBSDE,给出可验证的收敛条件,解释不收敛现象,并通过高维实验验证,适用于随机控制问题。

摘要:

我们关注由Han等人(2018)提出的深度BSDE方法所近似的高维耦合FBSDE系统。Han和Long(2020)已证明,当后向方程仅通过Y过程耦合到前向扩散中时,深度BSDE方法引起的误差具有依赖于损失函数的后验估计。我们将此结果推广到漂移系数也可能依赖于Z的情形,并在标准假设下给出收敛的充分条件。所得条件对任何方程均可直接验证。因此,与早期理论不同,我们的收敛性分析能够处理源自随机最优控制问题的FBSDE。特别地,我们为近期文献中观察到的深度BSDE方法不收敛现象提供了理论解释,并给出了在实践中何时能保证收敛的直接指导。我们的理论发现得到了若干高维数值实验的支持。

英文摘要:

We are concerned with high-dimensional coupled FBSDE systems approximated by the deep BSDE method of Han et al. (2018). It was shown by Han and Long (2020) that the errors induced by the deep BSDE method admit a posteriori estimate depending on the loss function, whenever the backward equation only couples into the forward diffusion through the Y process. We generalize this result to drift coefficients that may also depend on Z, and give sufficient conditions for convergence under standard assumptions. The resulting conditions are directly verifiable for any equation. Consequently, unlike in earlier theory, our convergence analysis enables the treatment of FBSDEs stemming from stochastic optimal control problems. In particular, we provide a theoretical justification for the non-convergence of the deep BSDE method observed in recent literature, and present direct guidelines for when convergence can be guaranteed in practice. Our theoretical findings are supported by several numerical experiments in high-dimensional settings.

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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