We present a regularization operator for the Nedelec tetraedric finite elem
ents. This operator requires only a minimal regularity when the classical o
perators need very more. Its construction relies on some macro-elements ass
ociated to the edges of the considered triangulation and uses dual function
s of the classical basis. We present the main properties of this operator a
nd give its local and global approximation estimates. (C) 2001 Academie des
sciences/Editions scientifiques et medicales Elsevier SAS.