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28 March 2024
 
  » arxiv » 1009.4412

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Small Ball Probabilities for Smooth Gaussian fields and Tensor Products of Compact Operators
Andrei I. Karol' ; Alexander I. Nazarov ;
Date 22 Sep 2010
AbstractWe find the logarithmic $L_2$-small ball asymptotics for a class of zero mean Gaussian fields with covariances having the structure of "tensor product". The main condition imposed on marginal covariances is slow growth at the origin of counting functions of their eigenvalues. That is valid for Gaussian functions with smooth covariances. Another type of marginal functions considered as well are classical Wiener process, Brownian bridge, Ornstein--Uhlenbeck process, etc., in the case of special self-similar measure of integration. Our results are based on new theorem on spectral asymptotics for the tensor products of compact self-adjoint operators in Hilbert space which is of independent interest. Thus, we continue to develop the approach proposed in the paper cite{KNN}, where the regular behavior at infinity of marginal eigenvalues was assumed.
Source arXiv, 1009.4412
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