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arXiv 1605.08804math.PR
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半鞅问题的鞅性质

Martingale Property in Terms of Semimartingale Problems

David Criens, Kathrin Glau

摘要:

从70年代开始,数学家们就面临着一个问题:一个非负的局部鞅是真的还是严格的局部鞅。在这篇文章中,我们从半鞅的角度回答这个问题。我们将鞅性质与半鞅问题的存在性、唯一性和拓扑性质联系起来。这不仅给出了鞅性质的有价值的刻画,而且揭示了半鞅问题的存在唯一性的新结果。作为一个例子,我们得到了由无穷维布朗运动驱动的随机指数的鞅性的显式条件。

英文摘要:

Starting from the seventies mathematicians face the question whether a non-negative local martingale is a true or a strict local martingale. In this article we answer this question from a semimartingale perspective. We connect the martingale property to existence, uniqueness and topological properties of semimartingale problems. This not only leads to valuable characterizations of the martingale property, but also reveals new existence and uniqueness results for semimartingale problems. As a case study we derive explicit conditions for the martingale property of stochastic exponentials driven by infinite-dimensional Brownian motion.

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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