Spectrum of the product of Toeplitz matrices with application in probability

Details Spectrum of the product of Toeplitz matrices with application in probability Spectrum of the product of Toeplitz matrices with application in probability

2007-12-10

arxiv.org/abs/0712.1302v1

Mathematics

Functional Analysis

16 pages

Scientific paper

We study the spectrum of the product of two Toeplitz operators. Assume that the symbols of these operators are continuous and real-valued and that one of them is non-negative. We prove that the spectrum of the product of finite section Toeplitz matrices converges to the spectrum of the product of the semi-infinite Toeplitz operators. We give an example showing that the supremum of this set is not always the supremum of the product of the two symbols. Finally, we provide an application in probability which is the first motivation of this study. More precisely, we obtain a large deviation principle for Gaussian quadratic forms.

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