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Название: Trigonometric Series With (k,s)-Monotone Coefficients in Spaces with Mixed Quasinorm
Автор: Simonov D.V.
Аннотация:
We estimate the sums of double series in sines and cosines with multiply monotone coefficients
and other more general coefficients. We obtain necessary and sufficient conditions for membership
of the sums of these series in the spaces with mixed quasinorm.