A note on double Fourier coefficients
Serdica Mathematical Journal, Tome 46 (2020) no. 2, pp. 101-108.

Voir la notice de l'article provenant de la source Bulgarian Digital Mathematics Library

We estimate the order of magnitude of double Fourier coefficients of functions of \((\phi,\psi)\)-\((\Lambda,\Gamma)\)-bounded variation in the sense of Vitali and Hardy.
Keywords: double Fourier series, order of magnitude, functions of \((\phi,\psi)\)-\((\Lambda,\Gamma)\)-bounded variation, 42B05, 26B30, 26D15
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Darji, Kiran; Vyas, Rajendra. A note on double Fourier coefficients. Serdica Mathematical Journal, Tome 46 (2020) no. 2, pp. 101-108. http://geodesic.mathdoc.fr/item/SMJ2_2020_46_2_a0/