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arXiv 2103.00280math.OCmath.PR
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拟平稳分布与遍历控制问题

Quasistationary Distributions and Ergodic Control Problems

Amarjit Budhiraja, Paul Dupuis, Pierre Nyquist, Guo-Jhen Wu

摘要:

本文介绍并研究了两个与扩散过程$X$关于有界区域的拟平稳分布(QSD)相关的遍历随机控制问题的基本性质。这两个问题在某种意义上是对偶的,一个是根据与$X$相关的生成元定义的,另一个是根据它的伴随元定义的。除了证明相关的Hamilton-Jacobi-Bellman方程的适定性,我们描述了它们如何可以用来表征QSD的重要属性。特别值得注意的是,QSD本身可以被识别,直到归一化,在与伴随相关的控制问题的成本潜力方面。

英文摘要:

We introduce and study the basic properties of two ergodic stochastic control problems associated with the quasistationary distribution (QSD) of a diffusion process $X$ relative to a bounded domain. The two problems are in some sense dual, with one defined in terms of the generator associated with $X$ and the other in terms of its adjoint. Besides proving wellposedness of the associated Hamilton-Jacobi-Bellman equations, we describe how they can be used to characterize important properties of the QSD. Of particular note is that the QSD itself can be identified, up to normalization, in terms of the cost potential of the control problem associated with the adjoint.

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