科研之友
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摘要
We consider the Wiener sausage for a Brownian motion with a constant drift up to time t associated with a closed ball. In the two or more dimensional cases, we obtain the explicit form of the expected volume of the Wiener sausage. The result says that it can be represented by the sum of the mean volumes of the multidimensional Wiener sausages without a drift. In addition, we show that the leading term of the expected volume of the Wiener sausage is written as kappa t(1+o[1]) for large t by a constant kappa. The expression for kappa is of a complicated form, but it converges to the known constant as the drift tends to 0.
- 出版日期2017-3
