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arXiv 2602.07255math.PR
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带有反应项的路径依赖麦肯PDE:对概率解释和粒子近似的讨论

Path-dependent McKean PDEs with reaction: a discussion on probabilistic interpretations and particle approximations

University of Milano(米兰大学);University of Oslo(奥斯陆大学)

Daniela Morale, Leonardo Tarquini, Stefania Ugolini

AI总结:

本文讨论了路径依赖麦肯PDE的两种概率解释及对应的粒子近似方法,并分析了其在求解PDE中的应用。

摘要:

在本文中,我们讨论并比较了将随机微分方程与带有反应项和路径依赖系数的麦肯型偏微分方程关联的两种概率方法。宏观动力学的非保守性质导致了子概率测度和关联SDE方程在微观尺度上的两种可能解释:一方面,作为费曼-卡茨型方程的测度解;另一方面,作为定义到生存时间的SDE的子概率,其速率依赖于反应。这些不同的解释导致了两种不同的微观随机模型,从而导致了两种不同的概率分析技术。最后,通过考虑与这两种模型相关的相互作用粒子系统,我们讨论了它们的经验密度如何为PDE解提供两种不同的核估计器。

英文摘要:

In this paper, we discuss and compare two probabilistic approaches for associating a stochastic differential equation with a McKean-type partial differential equation featuring a reaction term and path-dependent coefficients. The non-conservative nature of the macroscopic dynamics leads to two possible interpretations of the sub-probability measure and of the associated SDE equation at the microscale: on the one hand, as a measure-valued solution of a Feynman-Kac-type equation; on the other hand, as the sub-probability associated with an SDE defined up to a survival time with a reaction-dependent rate. These different interpretations give rise to two different microscopic stochastic models and therefore to two different techniques of probabilistic analysis. Finally, by considering the interacting particle systems associated with both models, we discuss how their empirical densities provide two different kernel estimators for the PDE solution.

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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