
It is shown that the Helson constant of a finite abelian group, G, is exactly ( Card G ) 1 / 2 {({\text {Card}}\;G)^{1/2}} .
Fourier and Fourier-Stieltjes transforms on locally compact and other abelian groups, Duality and reflexivity in normed linear and Banach spaces, Trigonometric interpolation
Fourier and Fourier-Stieltjes transforms on locally compact and other abelian groups, Duality and reflexivity in normed linear and Banach spaces, Trigonometric interpolation
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