COMMENTS ON THE DEPENDENCE BETWEEN ELECTRIC CHARGE AND MAGNETIC CHARGE

By using the two four-dimensional potential formulation of electromagnetic (EM) field theory introduced in Ref. 1, we found that the SO(2) duality symmetric EM field theory can be reduced to the magnetic source-free case by a special choice of SO(2) parameter, we called this special case nature picture of the EM field theory, the reduction condition led to a result, i.e. the electric charge and magnetic charge are no longer independent. Some comments to Ref. 10 are also mentioned.