Equations of electrodynamics in a spherical universe

Lorentz condition can be written in spinor form. Five-dimensional approach to the equations of electrodynamics in the spherical De Sitter world is developed. It turns out that the equations take an especially interesting form when the Lorentz condition is taken into account. It is shown how the limit transition from the spherical world to the flat world can be performed. The results obtained make it possible to apply to the electrodynamics the “invariant box” method.