%0 Journal Article %T Postnikov pieces and BZ/p-homotopy theory %A Natalia Castellana %A Juan A. Crespo %A Jerome Scherer %J Mathematics %D 2004 %I arXiv %X We present a constructive method to compute the cellularization with respect to K(Z/p, m) for any integer m > 0 of a large class of H-spaces, namely all those which have a finite number of non-trivial K(Z/p, m)-homotopy groups (the pointed mapping space map(K(Z/p, m), X) is a Postnikov piece). We prove in particular that the K(Z/p, m)-cellularization of an H-space having a finite number of K(Z/p, m)-homotopy groups is a p-torsion Postnikov piece. Along the way we characterize the BZ/p^r-cellular classifying spaces of nilpotent groups. %U http://arxiv.org/abs/math/0409399v1