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arXiv 2207.03312math.PRmath.OC
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关于直线上鞅扩散之间的特定相对熵

On the specific relative entropy between martingale diffusions on the line

Julio Backhoff-Veraguas, Clara Unterberger

AI总结:

本文研究了特定相对熵在直线上鞅扩散情形下的闭式表达式,首次部分证明了 Gantert 和 Foellmer 提出的关于连续鞅律与其二次变分之间关系的猜想。

摘要:

由 N. Gantert 引入的特定相对熵,允许量化潜在相互奇异测度的律之间的差异。它作为 Donsker 不变性原理随机化版本中的大偏差速率函数自然出现,同时也出现在 H. Foellmer 最近推导的一种新型传输信息不等式中。上述作者提出的一个猜想涉及连续鞅律之间的特定相对熵以其二次变分表示的闭式表达式。我们在此方向上提供了首个部分结果,通过在直线上行为良好的鞅扩散情况下证明该猜想。

英文摘要:

The specific relative entropy, introduced by N. Gantert, allows to quantify the discrepancy between the laws of potentially mutually singular measures. It appears naturally as the large deviations rate function in a randomized version of Donsker's invariance principle, as well as in a novel transport-information inequality recently derived by H. Foellmer. A conjecture, put forward by the aforementioned authors, concerns a closed form expression for the specific relative entropy between continuous martingale laws in terms of their quadratic variations. We provide a first partial result in this direction, by establishing this conjecture in the case of well-behaved martingale diffusions on the line.

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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