Resumen de Maximal and Area Integral Characterizations of Hardy-Sobolev Spaces in the Unit Ball of Cn.
Patrick Ahern, Joaquim Bruna i Floris 
In this paper we deal with several characterizations of the Hardy-Sobolev spaces in the unit ball of Cn, that is, spaces of holomorphic functions in the ball whose derivatives up to a certain order belong to the classical Hardy spaces. Some of our characterizations are in terms of maximal functions, area functions or Littlewood-Paley functions involving only complex-tangential derivatives. A special case of our results is a characterization of Hp itself involving only complex-tangential derivatives.
