Note on the transformation from the Lorenz gauge to the Coulomb gauge
arXiv:2405.16530
Abstract
There is a simple formula for the gauge function of the transformation from the Lorenz gauge to the Coulomb gauge, valid under a condition that is satisfied by some charge densities employed in the literature. An equation for the gauge function of this transformation that is alternative but equivalent to a formula of Jackson is derived also.
A co-author added and extended; 6 pages