Obtaining the expicit expression for a point charge field potential in
three-dimensional electrodynamics when the vacuum polarization is taken into
account; comparison of the results obtained by the different methods of calculation.
The present work is a continuation of Ref. [1]. It is of interest from the point of
view of further studying the chiral symmetry dynamic breaking in QED 3 [2-11] and
the properties of planar structures in solid physics [12-15]
