  Constraint Molecular dynamics CoMD calculations have been performed for
symmetric nuclear matter (NM) by using a simple effective interactions of the
Skyrme type. The set of parameter values reproducing common accepted saturation
properties of nuclear matter have been obtained for different degree of
stiffness characterizing the iso-vectorial potential density dependence. A
comparison with results obtained in the limit of the Semi-Classical Mean Field
approximation performed using the same kind of interaction put in evidence the
role played by the many-body correlations present in the model explaining also
the noticeable differences obtained in the parameter values in the two cases
