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Convergence problems of multiple trigonometric series and spectral decompositions. I. (English) Zbl 0367.42008


MSC:

42A20 Convergence and absolute convergence of Fourier and trigonometric series
42C15 General harmonic expansions, frames
42A24 Summability and absolute summability of Fourier and trigonometric series
35D10 Regularity of generalized solutions of PDE (MSC2000)
42B05 Fourier series and coefficients in several variables
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