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arXiv math/0612699math.PR
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连续半鞅的一个广义占用时间公式

A Generalized Occupation Time Formula For Continuous Semimartingales

Raouf Ghomrasni

摘要:

我们证明了对于一类广泛的函数$F$:$$ {\lim_{ε\downarrow 0} {\frac{1}ε} \int_0^t \Big\{F(s, X_s) - F(s, X_s - ε)\Big\} d\big<X,X\big>_s} = - \int_0^t\int_{\R} F(s, x) d L_s^x $$其中$X_t$是连续半鞅,$(L_t^x, x \in \R, t \geq 0)$是局部时过程,$(\big<X,X\big>_t, t \geq 0)$是二次变差过程.

英文摘要:

We show that for a wide class of functions $F$ that: $$ {\lim_{ε\downarrow 0} {\frac{1}ε} \int_0^t \Big\{F(s, X_s) - F(s, X_s - ε)\Big\} d\big<X,X\big>_s} = - \int_0^t\int_{\R} F(s, x) d L_s^x $$ where $X_t$ is a continuous semi-martingale, $(L_t^x, x \in \R, t \geq 0)$ its local time process and $(\big<X,X\big>_t, t \geq 0)$ its quadratic variation process.

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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