Theory of an Adiabatic Potential of Simple Metals. I. Exchange and Correlation Effects of Electrons

A method of irreducible vertex functions for the description of many‐electron interaction is introduced allowing the exact evaluation of the electron—electron interaction in every series term of the perturbation theory in pseudopotential by which the electron part of the adiabatic potential is presented. The equations for fully many‐particle amplitudes are obtained. Fully many‐particle amplitudes are found assuming that the irreducible vertex functions depend only on the momenta q transfered to electrons scattered from the pseudopotential. Limiting values (with q → O) of irreducible vertex functions are derived using exact relations of the Fermi‐liquid theory. [Russian Text Ignored]