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arXiv 1409.2387math.PR
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具有奇异边界点的一维扩散方程的准定常分布

Quasistationary distributions for one-dimensional diffusions with singular boundary points

Alexandru Hening, Martin Kolb

摘要:

在目前的工作中,我们描述的存在准平稳分布的扩散$(0,\infty)$允许奇异行为在$0$和$\infty$。如果在0处的吸收是确定的,我们表明,存在一个准平稳分布,只要发生器的频谱是严格正的。这补充了Collet等人(Ann.Probab. 2009)和Kolb和Steinsaltz(Ann.Probab. 2012)对于$0$是正则边界点,并扩展了Collet等人的结果(Ann.Probab. 2009年),在奇异扩散。

英文摘要:

In the present work we characterize the existence of quasistationary distributions for diffusions on $(0,\infty)$ allowing singular behavior at $0$ and $\infty$. If absorption at 0 is certain, we show that there exists a quasistationary distribution as soon as the spectrum of the generator is strictly positive. This complements results of Collet et al. (Ann. Probab. 2009) and Kolb and Steinsaltz (Ann. Probab. 2012) for $0$ being a regular boundary point and extends results by Collet et al. (Ann. Probab. 2009) on singular diffusions.

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