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arXiv 1102.5619math.PR
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粗糙道路空间上的微分结构与流方程

Differential Structure and Flow equations on Rough Path Space

Zhongmin Qian, Jan Tudor

摘要:

本文在巴拿赫空间V(2<p<3)上引入了弱几何p粗路空间的一个微分结构。我们首先考虑一个自然家庭的光滑粗糙的道路和微分截断张量系列。得到的对象有一个明确的解释,即使是非光滑的粗糙路径,我们采取的切空间的一个元素。我们可以将它唯一地关联到一个等价曲线类,等价由我们的微分结构定义。因此,对于粗糙道路空间上的泛函,我们可以定义切线方向上的导数,类似于定义维纳空间上泛函的Cameron-Martin方向上的导数。我们的切空间比Cameron-Martin空间包含更多的方向,并且我们不要求Wiener测度的拟不变性。此外,我们还局部(整体)求解了一类满足局部(整体)Lipshitz型条件的向量场的相关流方程。

英文摘要:

We introduce a differential structure for the space of weakly geometric p rough paths over a Banach space V for 2<p<3. We begin by considering a certain natural family of smooth rough paths and differentiating in the truncated tensor series. The resulting object has a clear interpretation, even for non-smooth rough paths, which we take to be an element of the tangent space. We can associate it uniquely to an equivalence class of curves, with equivalence defined by our differential structure. Thus, for a functional on rough path space, we can define the derivative in a tangent direction analogous to defining the derivative in a Cameron-Martin direction of a functional on Wiener space. Our tangent space contains many more directions than the Cameron-Martin space and we do not require quasi-invariance of Wiener measure. In addition we also locally (globally) solve the associated flow equation for a class of vector fields satisfying a local (global) Lipshitz type condition.

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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