> 42-XX Fourier analysis > 42BXX Fourier analysis in several variables

42B05 Fourier series and coefficients	42B08 Summability	42B10 Fourier and Fourier-Stieltjes transforms and other transforms of Fourier type
42B15 Multipliers	42B20 Singular integrals (Calderón-Zygmund, etc.)	42B25 Maximal functions, Littlewood-Paley theory
42B30 $H^p$-spaces	42B35 Function spaces arising in harmonic analysis	42B99 None of the above, but in this section

42BXX Fourier analysis in several variables