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Let $B_t$ be a standard Wiener motion. What can we say about $\text{d}M_t$ and $\text{d}B_t$ when $M_t=\max_{0\leq s\leq t}B_s$? Is there a relation?

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    Do you know how to relate $P(M_t\leq x)$ to probabilities involving $B_t$? If you have this relation, you can deduce the generator of $M_t$ by looking at $\lim_{t\rightarrow t_0} \frac{\mathbb{E}[f(M_t)]-f(M_{t_0})}{t-t_0}$2012-12-21
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    No, since $M_t=\max_{0\leq s \leq t}B_s$, I am not sure how to find the distribution of $M$. What is $f$?2012-12-22
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    The question is quite vague (and, as such, should probably be closed) but the OP might be referring to theorems relating (|B|,M) to a Brownian motion and its local time at zero.2012-12-28

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