On the analytic expression of the relativistic radial wave functions obtained from the analytic perturbation theory for screened Coulomb potentials

We look for the possibilities to express the radial functions (from the radial Dirac equation) by hypergeometric functions. This research is motivated by the fact that the screened wave functions could have many applications and it is useful to have different ways of writing the screened wave functions. Each form presents some advantages compared to the other. (author)