1. The problem statement, all variables and given/known data Find the vector potential from two oscillating point charges on the z axis. 2. Relevant equations [itex]z_+ = -z_0cos(\omega t) [/itex] [itex]q1_+ = q2_+ = q [/itex] 3. The attempt at a solution I know how to solve this problem when the two charges are equal and opposite, but now the two oscillating charges on the z-axis are both positive. Is this even possible? and if so, how is this different from the generic Hertzian problem? I also question my [itex]z_+[/itex] equation, does this look correct?