On relations between operators on R^{N}, T^{N} and Z^{N}
On relations between operators on R^{N}, T^{N} and Z^{N}
We study different discrete versions of maximal operators and g-functions arising from a convolution operator on R. This allows us, in particular, to complete connections with the results of de Leeuw [L] and Kenig and Tomas [KT] in the setting of the grou