Divergence of the perturbation-theory series and pseudoparticles
Lipatov L.N.
It is shown that the asymptotic form of the coefficients of expansion of the Gell-Mann-Low function in scalar theories of the form Hint = φ4/4! is determined by spherically symmetrical solutions of the classical equations in Euclidean 4-dimensional space and by the quantum fluctuations near these solutions.