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arXiv 1405.3540math.PR
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具有非控制强度的随机控制问题的后向SDE表示

Backward SDE Representation for Stochastic Control Problems with Non Dominated Controlled Intensity

Sébastien Choukroun, Andrea Cosso

摘要:

我们感兴趣的随机控制问题来自数学金融,特别是,与模型的不确定性,其中的不确定性影响波动率和强度。这类随机控制问题对应于一个完全非线性的积分-偏微分方程,它的特点是表征跳变部分的测度$(λ(a,\cdot))_a$不是固定的,而是依赖于一个参数$a$,该参数存在于某个欧氏空间$\R^q$的紧集$A$中.我们并不假定家族$(λ(a,\cdot))_a$是劣势的。此外,扩散部分可以是退化的。我们的目标是给出一个Bertmann表示,称为非线性Feynman-Kac公式,与这些控制问题相关的值函数。为此,我们引入了一类带跳跃和部分约束扩散部分的倒向随机微分方程。我们寻找最小的解决方案,这个家庭的BSDES,我们证明了唯一性和存在性的惩罚参数。然后,我们表明,最小的解决方案,我们的Besides提供了唯一的黏性解,我们完全非线性积分-偏微分方程。

英文摘要:

We are interested in stochastic control problems coming from mathematical finance and, in particular, related to model uncertainty, where the uncertainty affects both volatility and intensity. This kind of stochastic control problems is associated to a fully nonlinear integro-partial differential equation, which has the peculiarity that the measure $(λ(a,\cdot))_a$ characterizing the jump part is not fixed but depends on a parameter $a$ which lives in a compact set $A$ of some Euclidean space $\R^q$. We do not assume that the family $(λ(a,\cdot))_a$ is dominated. Moreover, the diffusive part can be degenerate. Our aim is to give a BSDE representation, known as nonlinear Feynman-Kac formula, for the value function associated to these control problems. For this reason, we introduce a class of backward stochastic differential equations with jumps and partially constrained diffusive part. We look for the minimal solution to this family of BSDEs, for which we prove uniqueness and existence by means of a penalization argument. We then show that the minimal solution to our BSDE provides the unique viscosity solution to our fully nonlinear integro-partial differential 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。

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