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arXiv 1005.3565math.PRmath.APmath.OCq-fin.PR
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具有无界障碍的二次反射倒向随机微分方程

Quadratic Reflected BSDEs with Unbounded Obstacles

Erhan Bayraktar, Song Yao

摘要:

本文研究了一类具有无界障碍和无界终端条件的实值反射倒向随机微分方程,当它的生成元$f$在$z$ -变量上具有二次增长时.特别是,我们得到的存在性,比较和稳定性的结果,并考虑最佳停止二次$g$评估。作为我们的结果的应用,我们分析了半线性抛物型偏微分方程的障碍问题,其中的非线性表现为梯度的平方。最后,我们证明了这些障碍问题的比较定理时,发生器是凸或凹的$z$ -变量。

英文摘要:

In this paper, we analyze a real-valued reflected backward stochastic differential equation (RBSDE) with an unbounded obstacle and an unbounded terminal condition when its generator $f$ has quadratic growth in the $z$-variable. In particular, we obtain existence, comparison, and stability results, and consider the optimal stopping for quadratic $g$-evaluations. As an application of our results we analyze the obstacle problem for semi-linear parabolic PDEs in which the non-linearity appears as the square of the gradient. Finally, we prove a comparison theorem for these obstacle problems when the generator is convex or concave in the $z$-variable.

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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