Geometric Fourier analysis. (English) Zbl 0488.42027
MSC:
42C05 | Orthogonal functions and polynomials, general theory of nontrigonometric harmonic analysis |
42B25 | Maximal functions, Littlewood-Paley theory |
42A38 | Fourier and Fourier-Stieltjes transforms and other transforms of Fourier type |
Keywords:
almost-orthogonality; Fourier transform; Hardy-Littlewood maximal function; sharp estimates for the L2-normReferences:
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