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arXiv 2102.11754math.PR
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非凸楔形体中反射布朗运动的平稳分布

On the stationary distribution of reflected Brownian motion in a non-convex wedge

Guy Fayolle, Sandro Franceschi, Kilian Raschel

摘要:

本文研究了非凸楔形体中的平稳反射布朗运动,与其凸模拟模型相比,在概率论文献中很少分析。我们证明了它的平稳分布可以通过求解一条曲线上的二维向量边值问题(BVP)的相应的拉普拉斯变换得到。这种向量边值问题的约化在文献中似乎是新的。相比之下,在凸情况下,一个单一的边界条件就足够了。当模型的参数(漂移、反射角协方差阵)关于圆锥的平分线对称时,模型可简化为凸锥中的标准反射布朗运动。最后,我们构造了一个单参数的分布族,它令人惊讶地提供了,对于任何楔形(凸或不凸),一个特定的例子,固定分布的反射布朗运动。

英文摘要:

We study the stationary reflected Brownian motion in a non-convex wedge, which, compared to its convex analogue model, has been much rarely analyzed in the probabilistic literature. We prove that its stationary distribution can be found by solving a two dimensional vector boundary value problem (BVP) on a single curve for the associated Laplace transforms. The reduction to this kind of vector BVP seems to be new in the literature. As a matter of comparison, one single boundary condition is sufficient in the convex case. When the parameters of the model (drift, reflection angles and covariance matrix) are symmetric with respect to the bisector line of the cone, the model is reducible to a standard reflected Brownian motion in a convex cone. Finally, we construct a one-parameter family of distributions, which surprisingly provides, for any wedge (convex or not), one particular example of stationary distribution of a reflected Brownian motion.

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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