We show that if log(2 - Delta)f epsilon L-2(R-d), then the inverse Fourier transform of f converges almost everywhere. Here the partial integrals in the Fourier inversion formula come from dilates of a closed bounded neighbourhood of the origin which is star shaped with respect to 0. Our proof is based on a simple application of the Rademacher-Menshov Theorem. In the special case of spherical partial integrals, the theorem was proved by Carbery and Soria. We obtain some partial results when root(log(2 - Delta))f epsilon L-2(R-d) and log log(4 - Delta)f epsilon L-2(R-d). We also consider sequential convergence for general elements of L-2(R-d).

Colzani, L., Meaney, C., Prestini, E. (2006). Almost everywhere convergence of inverse fourier transforms. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 134(6), 1651-1660 [10.1090/S0002-9939-05-08329-2].

Almost everywhere convergence of inverse fourier transforms

PRESTINI, ELENA
2006-01-01

Abstract

We show that if log(2 - Delta)f epsilon L-2(R-d), then the inverse Fourier transform of f converges almost everywhere. Here the partial integrals in the Fourier inversion formula come from dilates of a closed bounded neighbourhood of the origin which is star shaped with respect to 0. Our proof is based on a simple application of the Rademacher-Menshov Theorem. In the special case of spherical partial integrals, the theorem was proved by Carbery and Soria. We obtain some partial results when root(log(2 - Delta))f epsilon L-2(R-d) and log log(4 - Delta)f epsilon L-2(R-d). We also consider sequential convergence for general elements of L-2(R-d).
2006
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MAT/05 - ANALISI MATEMATICA
English
Inverse Fourier transform; Rademacher-Menshov Theorem; Series of orthogonal functions
Colzani, L., Meaney, C., Prestini, E. (2006). Almost everywhere convergence of inverse fourier transforms. PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, 134(6), 1651-1660 [10.1090/S0002-9939-05-08329-2].
Colzani, L; Meaney, C; Prestini, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/38923
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