Abstract
We establish estimates for the sequence of norms of nonlinear functional appearing in the problem of strong summability on disks of the Fourier series of functions continuous in a two-dimensional torus.
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Kuznetsova, O.I. On the problem of strong summability on disks. Ukr Math J 48, 699–705 (1996). https://doi.org/10.1007/BF02384236
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DOI: https://doi.org/10.1007/BF02384236