Rearrangements of gaussian fields

Details Rearrangements of gaussian fields Rearrangements of gaussian fields

2009-09-07

arxiv.org/abs/0909.1288v3

Mathematics

Probability

28 pages

Scientific paper

The monotone rearrangement of a function is the non-decreasing function with the same distribution. The convex rearrangement of a smooth function is obtained by integrating the monotone rearrangement of its derivative. This operator can be applied to regularizations of a stochastic process to measure quantities of interest in econometrics. A multivariate generalization of these operators is proposed, and the almost sure convergence of rearrangements of regularized Gaussian fields is given. For the Fractional Brownian field or the Brownian sheet approximated on a simplicial grid, it appears that the limit object depends on the orientation of the simplices.

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