The Spin Free Particle with the diffluence in the Center Mass System is described. The momentum of this particle is non parallel to velocity. The Klein-Gordon equation for this case is modified.

The method of Bogoliubov’s regularization in Kadyshevsky’s representation for elektromagnetic-meson interaction is described.

Some thoughts concerning the role of theoretical physics in educating the teachers of physics are presented by the authors of the paper. They evaluate the importance of theoretical physics in the university syllabi and ...

Paper discusses the general causality condition formulated basing on the generalized scheme of axiomatic quantum field theory of N.N. Bogolubov.