Green´s functions in evaluating fields

IN A PREVIOUS paper¹ it was shown how expressions for vector potential could be derived from corresponding values of scalar potential for a point source which are given in Tables of Green´s Functions previously published.² It then was shown how these expressions for vector potential could be used to derive the electromagnetic fields due to uniformly magnetized disks, or due to coils by building them up from magnetic doublets or individual current elements by integration. The examples given in that paper¹ were limited to those in which the field did not vary with time, since some additional concepts need to be introduced when the field varies with time.