1.Introduction. 2.Characterizacion of the elements of Dn and DN0. 3.The milnor number of isolated diacritical singularities in dimension 3. 4.The theorem of desingularization for 3-Dimension al holomorphics vector field with absolutely isolated singularities. 5.The theorem of desingularization for n-Dimension al holomorphics vector field with absolutely isolated singularities. 6.The theorem of desingularization for elements of D30 with algebraic multiplicity two.