Small ball probabilities, metric entropy and Gaussian rough paths
Small ball probabilities, metric entropy and Gaussian rough paths
复制标题
小球概率、度量熵和高斯粗糙路径
DOI:
10.1016/j.jmaa.2021.125697
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发表时间:
2022
影响因子:
1.3
通讯作者:
Salkeld W
中科院分区:
文献类型:
--
作者:
Salkeld W
We study the Small Ball Probabilities (SBPs) of Gaussian rough paths. While many works on rough paths study the Large Deviations Principles (LDPs) for stochastic processes driven by Gaussian rough paths, it is a noticeable gap in the literature that SBPs have not been extended to the rough path framework. LDPs provide macroscopic information about a measure for establishing Integrability type properties. SBPs provide microscopic information and are used to establish a locally accurate approximation for a measure. Given the compactness of a Reproducing Kernel Hilbert space (RKHS) ball, its metric entropy provides invaluable information on how to approximate the law of a Gaussian rough path.As an application, we are able to find upper and lower bounds for the rate of convergence of an empirical rough Gaussian measure to its true law in pathspace.
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