Sur Le Comportement Asymptotique D'Une Transformation De La Fonction Spectrale De L'Opérateur De Laplace
Slowly oscillating functions and their application to the asymptotic evaluations of the Riesz and G... means of multiple Fourier series.
Über die G...-Summierbarkeit der verallgemeinerten Fourier-Reihen.
Über Die Gאּθ-Summierbarkeit Der Verallgemeinerten Fourier-Reihen
On Spectral Means And Some Of Their Applications
On the Asymptotic Behaviour of the Gthetak-means of Eigenfunction Expansion Related to the Slowly Oscillating Functions With Remainder Term
Sur Un Procedé de Sommation des Sèries Divergentes
On the summability of multiple Fourier series
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