arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.02192math.OC
收藏

期望约束下最优停时的动态规划原理

Dynamic Programming Principles for Optimal Stopping with Expectation Constraint

Erhan Bayraktar, Song Yao

摘要:

我们分析了一个具有期望费用约束的最优停止问题。当报酬函数和费用函数在状态变量上是Lipschitz连续的时,我们证明了这样一个最优停止问题的值在当前状态和预算水平上都是一个连续函数.然后,我们推导出一个动态规划原则(DPP)的价值函数,其中的条件期望成本作为一个额外的状态过程。由于具有期望约束的最优停止问题可以转化为具有上鞅控制的随机最优化问题,我们研究了价值函数的第二个DPP,从而解决了[S. Ankirchner,M. Klein和T.张文,等,一个求解具有期望约束的最优停止问题的验证定理,应用数学与优化,2017,pp. 1-33]。基于这两个DPP,我们将值函数刻画为相关的完全非线性抛物型Hamilton-Jacobi-Bellman方程的黏性解。

英文摘要:

We analyze an optimal stopping problem with a constraint on the expected cost. When the reward function and cost function are Lipschitz continuous in state variable, we show that the value of such an optimal stopping problem is a continuous function in current state and in budget level. Then we derive a dynamic programming principle (DPP) for the value function in which the conditional expected cost acts as an additional state process. As the optimal stopping problem with expectation constraint can be transformed to a stochastic optimization problem with supermartingale controls, we explore a second DPP of the value function and thus resolve an open question recently raised in [S. Ankirchner, M. Klein, and T. Kruse, A verification theorem for optimal stopping problems with expectation constraints, Appl. Math. Optim., 2017, pp. 1-33]. Based on these two DPPs, we characterize the value function as a viscosity solution to the related fully non-linear parabolic Hamilton-Jacobi-Bellman equation.

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。

↑