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arXiv 1111.5137math.PR
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具有无界终端条件的马尔可夫二次和超二次倒向随机微分方程

Markovian quadratic and superquadratic BSDEs with an unbounded terminal condition

Adrien Richou

摘要:

研究了具有无界终端条件的二次和超二次马尔可夫倒向随机微分方程解的存在唯一性。我们的研究结果与一个强大的先验估计$Z$,利用马尔可夫框架。这个估计使我们能够证明黏性解的存在性的半线性抛物型偏微分方程与非线性具有二次或超二次增长的梯度的解决方案。这个估计也使我们能够给出明确的收敛速度的时间近似的二次或超二次马尔可夫倒向随机微分方程。

英文摘要:

This article deals with the existence and the uniqueness of solutions to quadratic and superquadratic Markovian backward stochastic differential equations (BSDEs for short) with an unbounded terminal condition. Our results are deeply linked with a strong a priori estimate on $Z$ that takes advantage of the Markovian framework. This estimate allows us to prove the existence of a viscosity solution to a semilinear parabolic partial differential equation with nonlinearity having quadratic or superquadratic growth in the gradient of the solution. This estimate also allows us to give explicit convergence rates for time approximation of quadratic or superquadratic Markovian BSDEs.

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