arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1907.02442math.PR
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非正则g-测度与变长记忆链

Non-regular g-measures and variable length memory chains

Ricardo F. Ferreira, Sandro Gallo, Frédéric Paccaut

摘要:

众所周知,总是存在至少一个与连续g-函数g相容的平稳测度。本文证明了如果g-函数g的间断集在由某种渐近方法得到的候选测度下有零测度,则该候选测度与g相容。我们探讨了这一结果的几个影响,并讨论了与文献有关的假设和例子的比较。本文的重要部分是关于变长记忆链的情形,在新的假设下,我们得到了它的存在性、唯一性和弱Bernoulcity(或$β$ -mixing).这些结果是专门为变长记忆模型设计的,并且不需要消失的均匀变化。我们还进一步讨论了一些相关的概念,如随机上下文过程,非本质不连续性,最后给出了处处不连续平稳测度的例子。

英文摘要:

It is well-known that there always exists at least one stationary measure compatible with a continuous g-function g. Here we prove that if the set of discontinuities of the g-function g has null measure under a candidate measure obtained by some asymptotic procedure, then this candidate measure is compatible with g. We explore several implications of this result, and discuss comparisons with the literature concerning assumptions and examples. Important part of the paper is concerned with the case of variable length memory chains, for which we obtain existence, uniqueness and weak-Bernoullicity (or $β$-mixing) under new assumptions. These results are specially designed for variable length memory models, and do not require vanishing uniform variation. We also provide a further discussion on some related notions, such as random context processes, non-essential discontinuities, and finally an example of everywhere discontinuous stationary measure.

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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