They cover the general relativistic two-body problem, Hamiltonian dynamics of spinning compact binaries through high post-Newtonian approximations, the
covariant theory of the post-Newtonian equations of motion of extended bodies, the DSX-framework, the general relativistic theory of light propagation in multipolar gravitational fields, the back-reaction problem in cosmology, and post-Newtonian approximations in cosmology, ([umlaut] Ringgold, Inc., Portland, OR)
Recently, the author, in terms of his 5D fully
covariant theory of gravitation, has quantitatively determined the dielectric constant of the polarized vacuum in accordance with the charge-mass ratio of a charged object [14].