BONAMI, Aline; JAMING, Philippe; KAROUI, Abderrazek

doi:10.1063/1.5140496

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BONAMI, Aline
Mathématiques - Analyse, Probabilités, Modélisation - Orléans [MAPMO]

JAMING, Philippe
Institut de Mathématiques de Bordeaux [IMB]

KAROUI, Abderrazek
Département de mathématiques

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Journal of Mathematical Physics. 2021, vol. 62, p. 033511

American Institute of Physics (AIP)

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Prolate spheroidal wave functions have recently attracted a lot of attention in applied harmonic analysis, signal processing and mathematical physics. They are eigenvectors of the Sinc-kernel operator Qc : the time-and band-limiting operator. The corresponding eigenvalues play a key role and it is the aim of this paper to obtain precise non-asymptotic estimates for these eigenvalues, within the three main regions of the spectrum of Qc. This issue is rarely studied in the literature, while the asymptotic behaviour of the spectrum of Qc has been well established from the sixties. As applications of our non-asymptotic estimates, we first provide estimates for the constants appearing in Remez and Turàn-Nazarov type concentration inequalities. Then, we give an estimate for the hole probability, associated with a random matrix from the Gaussian Unitary Ensemble (GUE).< Leer menos

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Non-Asymptotic behaviour of the spectrum of the Sinc Kernel Operator and Related Applications

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