## The multiplier problem for the ball.(English)Zbl 0234.42009

### MSC:

 42B05 Fourier series and coefficients in several variables 47B37 Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.) 46E30 Spaces of measurable functions ($$L^p$$-spaces, Orlicz spaces, Köthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.)
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