On the existence of paths between points in high level excursion sets of Gaussian random fields

Authors:
  • RARobert J. Adler
    Robert J. Adler
  • EMElina Moldavskaya
    Elina Moldavskaya
  • GSGennady Samorodnitsky
    Gennady Samorodnitsky
Open Access
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Abstract
The structure of Gaussian random fields over high levels is a well researched and well understood area, particularly if the field is smooth. However, the question as to whether or not two or more points which lie in an excursion set belong to the same connected component has constantly eluded analysis. We study this problem from the point of view of large deviations, finding the asymptotic probabilities that two such points are connected by a path laying within the excursion set, and so belong to the same component. In addition, we obtain a characterization and descriptions of the most likely paths, given that one exists.