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arXiv 1312.3232math.PR
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$\mathbb{R}^{N}$中半鞅的一个占据时间公式

An occupation time formula for semimartingales in $\mathbb{R}^{N}$

Andrea Bevilacqua, Franco Flandoli

摘要:

受几何测度论中余面积公式的启发,证明了$\mathbb{R}^{N}$中连续半鞅的一个占据时间公式。对于$N\geq2$,半鞅的占有测度关于勒贝格测度是奇异的,但在适当的假设下,它有一个有界的密度“横切”于叶理。在特定的情况下,当地的距离函数从一个流形的叶理,横向密度有关的几何局部时间的半鞅在流形的叶理。

英文摘要:

Inspired by coarea formula in geometric measure theory, an occupation time formula for continuous semimartingales in $\mathbb{R}^{N}$ is proven. The occupation measure of a semimartingale, for $N\geq2$, is singular with respect to Lebesgue measure but it has a bounded density "transversal" to a foliation, under proper assumptions. In the particular case of the foliation given locally by the distance function from a manifold, the transversal density is related to a geometric local time of the semimartingale at the manifolds of the foliation.

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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