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arXiv 0802.3112math.PR
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Lévy过程的多重Stratonovich积分和Hu-Meyer公式

Multiple Stratonovich integral and Hu--Meyer formula for Lévy processes

Mercè Farré, Maria Jolis, Frederic Utzet

摘要:

在向量测度和随机多重积分的组合方法的框架下,引入了Rota和Wallstrom [Ann. Probab. 25(1997)1257--1283]中,我们给出了关于有限阶矩的Lévy过程的Itô多重积分和Stratonovich多重积分.在这样的框架中,Stratonovich多重积分是关于乘积随机测度的积分,而Itô多重积分对应于关于对角集为零质量的随机测度的积分。给出了两个积分之间关系的一般Hu-Meyer公式。作为特例,导出了布朗运动和泊松过程的经典Hu-Meyer公式.进而给出了多重积分关于从属算子的路径解释。

英文摘要:

In the framework of vector measures and the combinatorial approach to stochastic multiple integral introduced by Rota and Wallstrom [Ann. Probab. 25 (1997) 1257--1283], we present an Itô multiple integral and a Stratonovich multiple integral with respect to a Lévy process with finite moments up to a convenient order. In such a framework, the Stratonovich multiple integral is an integral with respect to a product random measure whereas the Itô multiple integral corresponds to integrate with respect to a random measure that gives zero mass to the diagonal sets. A general Hu--Meyer formula that gives the relationship between both integrals is proved. As particular cases, the classical Hu--Meyer formulas for the Brownian motion and for the Poisson process are deduced. Furthermore, a pathwise interpretation for the multiple integrals with respect to a subordinator is given.

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