[en] The technique of partial going out beyond the frames of the perturbation theory, when calculating the Gell-Mann-Low function (GML) and the anomalous dimension, is suggested. With the six-dimensional theory of a scalar field with the nondimensional binding constant, taken as an example, a renormalized equation for the mass operator has been obtained. The Green double-point function and the vertex function, which are necessary for determining the GML function, and calculated in a ladder approximation. Only Feynmann diagram sums are taken into account in the expressions for the mass operator and the vertex