Stochastic codimension conjecture for Gaussian-process images
Stochastic codimension conjecture for Gaussian-process images
Let be the Gaussian process from the almost-sure image-dimension zero-one law, let be Borel, and let and denote the lower and upper metric-Minkowski dimensions associated with the canonical metric . Write for the almost-sure value of , and let be the Euclidean dimension of the state space. Assume
Stochastic codimension conjecture. For every Borel set in the state space,
and
Equivalently, the conjectured stochastic codimension is
The claim would identify the hitting-probability threshold of the image with its almost-sure Euclidean Hausdorff dimension, extending the known estimates beyond the regularity regime of Condition . The source states that the value of is unknown for highly irregular processes, so this remains open.
Sources & referencesView supporting material
Primary source
Youssef Hakiki and Frederi Viens, “Irregularity scales for Gaussian processes: Hausdorff dimensions and hitting probabilities”, arXiv:2307.16886 (2023).
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