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arXiv 0912.0328math.PR
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类时图上的马尔可夫过程

Markov processes on time-like graphs

Krzysztof Burdzy, Soumik Pal

摘要:

本文研究了在有向图中用路径代替时间参数的马氏过程。如果两条有向路径不相互作用,则在适当的意义下,这两条路径上的过程的分布是条件独立的,给定它们在两条路径的公共端点处的值。支持这些过程的图上的条件(例如,六边形晶格)。接下来,我们分析一类特别合适的马尔可夫过程,称为线束,其中包括布朗运动和其他Lévy过程,在这样的类时图。最后,我们研究了类时图序列上的线束的连续极限,该序列在适当的意义下具有极限。

英文摘要:

We study Markov processes where the "time" parameter is replaced by paths in a directed graph from an initial vertex to a terminal one. Along each directed path the process is Markov and has the same distribution as the one along any other directed path. If two directed paths do not interact, in a suitable sense, then the distributions of the processes on the two paths are conditionally independent, given their values at the common endpoint of the two paths. Conditions on graphs that support such processes (e.g., hexagonal lattice) are established. Next we analyze a particularly suitable family of Markov processes, called harnesses, which includes Brownian motion and other Lévy processes, on such time-like graphs. Finally we investigate continuum limits of harnesses on a sequence of time-like graphs that admits a limit in a suitable sense.

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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