Space-time topology as a consequence of the dynamics of closed boson strings. II. The second approximation

The possibility of constructing a theory where the space-time topology would be determined by the dynamics of closed boson strings is analyzed. The analysis has the form of an expansion into a series with respect to the coupling constant. The second-order expansion is considered. Some new constraints on the admissible space-time topology are found in addition to those in the first-order approximation.