A study of the generalized Hubbard model in the ferromagnetic phase by means of the COM is reported in Ref. . In particular the following properties have been computed:
The COM results have been analyzed in relation with the ones obtained by:
A ferromagnetic solution for the 2D Extended Hubbard model has been found by means of a fully self-consistent approximation enforcing Pauli symmetry constrains. The transition results to be of the second order both lowering the filling and the interaction strength. The saturation is reached by increasing . An increment of the parameter lowers the magnetization. These results are in qualitative agreement with the ones by W. Nolting et al.  for the three-dimensional Hubbard model and permit an easy determination of the critical values for the filling and the Coulomb interaction in the two-dimensional case.