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arXiv math/0602625math.PR
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与风险敏感控制相关的遍历型Bellman方程解的结构

On the structure of solutions of ergodic type Bellman equation related to risk-sensitive control

Hidehiro Kaise, Shuenn-Jyi Sheu

摘要:

考虑了与风险敏感控制相关的各态历经型Bellman方程。本文研究了非线性项在解的一阶偏导数上为正二次型的情况,包括线性指数二次型高斯控制问题。本文证明了该方程一般有多个解。我们将指定所有经典解的集合,并通过与给定解相关联的扩散过程的全局行为对解进行分类。与遍历扩散过程相关的解起着特殊的作用。我们还将证明这种解的唯一性。此外,给出遍历性的解在系数扰动下是稳定的。最后,我们得到了遍历扩散方程解的一个表示结果。

英文摘要:

Bellman equations of ergodic type related to risk-sensitive control are considered. We treat the case that the nonlinear term is positive quadratic form on first-order partial derivatives of solution, which includes linear exponential quadratic Gaussian control problem. In this paper we prove that the equation in general has multiple solutions. We shall specify the set of all the classical solutions and classify the solutions by a global behavior of the diffusion process associated with the given solution. The solution associated with ergodic diffusion process plays particular role. We shall also prove the uniqueness of such solution. Furthermore, the solution which gives us ergodicity is stable under perturbation of coefficients. Finally, we have a representation result for the solution corresponding to the ergodic diffusion.

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