Gambling for Resurrection and the Heat Equation on a Triangle

Gambling for Resurrection and the Heat Equation on a Triangle
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复活赌博和三角形上的热方程

DOI:
10.1007/s00245-020-09741-9
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发表时间:
2019
影响因子:
1.8
通讯作者:
Chao Zhou
Chao Zhou
中科院分区:
数学2区
文献类型:
--
作者:
S. Ankirchner;Christophette Blanchet;N. Kazi;Chao Zhou

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我们考虑的问题,控制扩散系数的扩散与恒定的负漂移率,使击中一个给定的较低的障碍,一些有限的时间范围内的概率最小化。我们假设扩散率可以以渐进可测量的方式选择,其值在区间[0,1]内。我们证明了值函数是正则的,凹的空间变量,它解决了相关的HJB方程。为此,我们证明了直角三角形上的热方程,其边界条件在角上是不连续的,具有光滑解。
We consider the problem of controlling the diffusion coefficient of a diffusion with constant negative drift rate such that the probability of hitting a given lower barrier up to some finite time horizon is minimized. We assume that the diffusion rate can be chosen in a progressively measurable way with values in the interval [0, 1]. We prove that the value function is regular, concave in the space variable, and that it solves the associated HJB equation. To do so, we show that the heat equation on a right triangle, with a boundary condition that is discontinuous in the corner, possesses a smooth solution.
DOI: 10.2307/2670145
发表时间: 1996-06
期刊: --
影响因子: --
作者:
A. Borodin;P. Salminen
通讯作者: A. Borodin;P. Salminen