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arXiv 2009.14779math.PR
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二维马尔可夫过程的稳定性及其对具有无穷多个相的QBD过程的应用

Stability of two-dimensional Markov processes, with an application to QBD processes with an infinite number of phases

Stella Kapodistria, Seva Shneer

摘要:

在本文中,我们推导出一类二维马尔可夫过程的稳定性的一个简单的漂移条件,其中一个坐标(也称为{ \em阶段}为方便)有一个很好理解的行为依赖于其他坐标(也称为{ \em水平})。第一(相位)分量的转变可以取决于第二分量,并且仅被假设为最终独立。第二个(水平)分量具有部分有界跳跃,假设第一个分量处于其平稳分布中,则第二个分量具有负漂移。在这项工作中提出的结果可以应用到QBD(准生灭)型的四分之一和半平面上,相位和水平是相互依赖的过程。此外,他们提供了一个现成的技术来解决一类二维马尔可夫过程的稳定性问题。这些结果为缩小文献中存在的差距提供了垫脚石,该文献推导出了两个组件之间具有无界跳跃和相互依赖性的二维过程的易于验证的条件/标准。

英文摘要:

In this paper, we derive a simple drift condition for the stability of a class of two-dimensional Markov processes, for which one of the coordinates (also referred to as the {\em phase} for convenience) has a well understood behaviour dependent on the other coordinate (also referred as {\em level}). The first (phase) component's transitions may depend on the second component and are only assumed to be eventually independent. The second (level) component has partially bounded jumps and it is assumed to have a negative drift given that the first one is in its stationary distribution. The results presented in this work can be applied to processes of the QBD (quasi-birth-and-death) type on the quarter- and on the half-plane, where the phase and level are interdependent. Furthermore, they provide an off-the-shelf technique to tackle stability issues for a class of two-dimensional Markov processes. These results set the stepping stones towards closing the existing gap in the literature of deriving easily verifiable conditions/criteria for two-dimensional processes with unbounded jumps and interdependence between the two components.

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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