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Transformations of Wiener measure and orthogonal expansions

机译:维纳测度的变换和正交展开

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In this paper we study the structure of square integrable functionals measurable with respect to coalescing stochastic flows. The case of the Wiener process stopped at the moment of hitting an irregular continuous level is considered. Relying on the change of measure technique, we present a new construction of multiple stochastic integrals with respect to stopped Wiener process. An intrinsic analogue of the Ito-Wiener expansion for the space of square integrable functionals measurable with respect to the stopped Wiener process is constructed.
机译:在本文中,我们研究了关于可合并随机流可测量的平方可积泛函的结构。考虑到在达到不规则连续水平时维纳过程停止的情况。依靠测量技术的变化,相对于停止的维纳过程,我们提出了一种多元随机积分的新结构。构造了一个伊藤-维纳展开式的内在类似物,该展开式相对于停止的维纳过程可测量的平方可积函数的空间。

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