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The Hardy—Littlewood theorem for double Fourier—Haar series from mixed metric Lebesgue L[0, 1]2 and net Np̄, q̄(M) spaces

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Abstract

We obtain a criterion given in terms of the Fourier-Haar co-efficients for the function f(x1, x2) to belong to the net space Np̄, q̄(M) and to the Lebesgue space L[0, 1]2 with mixed metric, where 1 < < ∞,0 < ≤ ∞, =(p1, p2), =(q1, q2) and M is the set of all rectangles in ℝ2. We prove the Hardy-Littlewood theorem for multiple Fourier-Haar series.

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Correspondence to E. D. Nursultanov.

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This work was supported by the Ministry of Education and Science of the Republic of Kazakhstan (Grant AP08856479).

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Bashirova, A.N., Nursultanov, E.D. The Hardy—Littlewood theorem for double Fourier—Haar series from mixed metric Lebesgue L[0, 1]2 and net Np̄, q̄(M) spaces. Anal Math 48, 5–17 (2022). https://doi.org/10.1007/s10476-022-0115-0

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  • DOI: https://doi.org/10.1007/s10476-022-0115-0

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