A stability theorem for solutions of general time interval multidimensional BSDEs with uniformly continuous generators
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摘要: 在生成元g关于y满足对t不一致的Osgood条件,关于z满足对t不一致的一致连续条件且g的第i个分量仅仅依赖于(w,t,y)及矩阵z的第i行的条件下,范胜君等在2015年证明了一般时间终端多维倒向随机微分方程(简称BSDE)解的存在性和唯一性.在此基础上,本文利用一致连续函数可用Lipschitz函数一致逼近的性质、迭代技术、Girsanov变换及Bihari不等式等工具,首次建立了上述条件下一般时间终端多维BSDE解的一个稳定性定理.
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关键词:
- 多维倒向随机微分方程 /
- 稳定性定理 /
- 一致连续 /
- 一般时间终端
Abstract: The existence and uniqueness of solutions for general time interval multi-dimensional backward stochastic differential equations (BSDEs) was proved in Fan et al. (2015) under assumptions that the generator g satisfies the Osgood condition in y and the uniformly continuous condition in z both non-uniformly with respect to t, and the i-th component gi of g depends only on(w, t, y) and the i-th row of the matrix z. In this paper, by virtue of a uniform approximation of uniformly continuous functions by a sequence of Lipschitz functions, the theorem of Girsanov, and the Bihari inequality, we establish, for the first time, a stability theorem for the solutions of the general time interval multidimensional BSDEs with uniformly continuous generators. -
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