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arXiv math/9807184math.PR
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超布朗运动出口测度的非退化条件

Non-degenerate conditionings of the exit measures of super-Brownian motion

Thomas S. Salisbury, John Verzani

摘要:

引入了超布朗运动的退出测度律的几种测度鞅变换。这些测度的变化包括并推广了一个条件所产生的出口措施,以收费的边界上的一个点的2维区域。在我们讨论的情况下,这是一个非退化条件。我们用具有质量迁移的“不朽粒子”分支过程给出了新过程的特征,并给出了它在研究D中Lu = cu^2解中的应用。的表示是相关的那些在较早的文件,其中处理的情况下,退化的条件。

英文摘要:

We introduce several martingale changes of measure of the law of the exit measure of super Brownian motion. These changes of measure include and generalize one arising by conditioning the exit measures to charge a point on the boun dary of a 2-dimensional domain. In the case we discuss this is a non-degenerate conditioning. We give characterizations of the new processes in terms of "immortal particle" branching processes with immigration of mass, and give application s to the study of solutions to Lu = cu^2 in D. The representations are related to those in an earlier paper, which treated the case of degenerate conditionings.

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