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arXiv 1111.1846math.PR
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$\RR$上布朗流的三个例子

Three examples of Brownian flows on $\RR$

Yves Le Jan, Olivier Raimond

摘要:

我们证明了在$\RR$ $$dX_t = 1_{\{X_t>0\}}W_+(dt) + 1_{\{X_t<0\}}dW_-(dt),$$上求解随机微分方程的唯一流是一个聚结流,我们记为$\p^{\pm}$,其中$W^+$和$W^-$是两个独立的白噪声。流$\p^\pm$是维纳解。此外,$K^+=\E[δ_{\p^\pm}|W_+]$是对于$s的双$$K^+_{s,t}f(x)=f(x)+\int_s^t K_{s,u}(1_{\RR^+}f')(x)W_+(du)+(1/2) \int_s^t K_{s,u}f"(x) du$$的唯一解(它也是Wiener解

英文摘要:

We show that the only flow solving the stochastic differential equation (SDE) on $\RR$ $$dX_t = 1_{\{X_t>0\}}W_+(dt) + 1_{\{X_t<0\}}dW_-(dt),$$ where $W^+$ and $W^-$ are two independent white noises, is a coalescing flow we will denote $\p^{\pm}$. The flow $\p^\pm$ is a Wiener solution. Moreover, $K^+=\E[δ_{\p^\pm}|W_+]$ is the unique solution (it is also a Wiener solution) of the SDE $$K^+_{s,t}f(x)=f(x)+\int_s^t K_{s,u}(1_{\RR^+}f')(x)W_+(du)+(1/2) \int_s^t K_{s,u}f"(x) du$$ for $s

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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